WO2003035811A9 - Remediation of a hydrocarbon containing formation - Google Patents
Remediation of a hydrocarbon containing formationInfo
- Publication number
- WO2003035811A9 WO2003035811A9 PCT/US2002/034210 US0234210W WO03035811A9 WO 2003035811 A9 WO2003035811 A9 WO 2003035811A9 US 0234210 W US0234210 W US 0234210W WO 03035811 A9 WO03035811 A9 WO 03035811A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formation
- fluid
- hydrocarbons
- heat
- hydrocarbon
- Prior art date
Links
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 382
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 194
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 190
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 124
- 238000005067 remediation Methods 0.000 title description 5
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- 238000000034 method Methods 0.000 claims abstract description 65
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 229910001868 water Inorganic materials 0.000 claims description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000356 contaminant Substances 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims 1
- 238000009835 boiling Methods 0.000 claims 1
- 235000012206 bottled water Nutrition 0.000 claims 1
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- 239000011261 inert gas Substances 0.000 claims 1
- 239000011780 sodium chloride Substances 0.000 claims 1
- 238000005755 formation reaction Methods 0.000 description 334
- 238000000197 pyrolysis Methods 0.000 description 43
- 239000007789 gas Substances 0.000 description 38
- 238000010438 heat treatment Methods 0.000 description 34
- 238000011084 recovery Methods 0.000 description 28
- 238000003786 synthesis reaction Methods 0.000 description 26
- 239000000463 material Substances 0.000 description 23
- 230000035699 permeability Effects 0.000 description 15
- 239000001257 hydrogen Substances 0.000 description 14
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- 239000003245 coal Substances 0.000 description 9
- 239000011148 porous material Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000013508 migration Methods 0.000 description 8
- 230000005012 migration Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 150000002431 hydrogen Chemical class 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000007598 dipping method Methods 0.000 description 6
- 239000008398 formation water Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000004058 oil shale Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000003673 groundwater Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
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- 150000003839 salts Chemical class 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 238000007669 thermal treatment Methods 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000012184 mineral wax Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
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- 239000011435 rock Substances 0.000 description 2
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- 238000001256 steam distillation Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- YZCKVEUIGOORGS-UHFFFAOYSA-N Hydrogen atom Chemical compound [H] YZCKVEUIGOORGS-UHFFFAOYSA-N 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
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- 239000003570 air Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
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- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 150000003738 xylenes Chemical class 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2401—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection by means of electricity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/24—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by heating with electrical means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimizing the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimizing the spacing of wells comprising at least one inclined or horizontal well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
- E21B47/0224—Determining slope or direction of the borehole, e.g. using geomagnetism using seismic or acoustic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/028—Electrical or electro-magnetic connections
- E21B17/0285—Electrical or electro-magnetic connections characterised by electrically insulating elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/40—Ethylene production
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/901—Specified land fill feature, e.g. prevention of ground water fouling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0318—Processes
- Y10T137/0391—Affecting flow by the addition of material or energy
Definitions
- the present invention relates generally to methods and systems for production of hydrocarbons, hydrogen, and/or other products from various hydrocarbon containing formations. Certain embodiments relate to remediation of a treatment area after production from the treatment area.
- Hydrocarbons obtained from subterranean (e.g., sedimentary) formations are often used as energy resources, as feedstocks, and as consumer products.
- Concerns over depletion of available hydrocarbon resources and declining overall quality of produced hydrocarbons have led to development of processes for more efficient recovery, processing and/or use of available hydrocarbon resources.
- In situ processes may be used to remove hydrocarbon materials from subterranean formations.
- Chemical and/or physical properties of hydrocarbon material within a subterranean formation may need to be changed to allow hydrocarbon material to be more easily removed from the subterranean formation.
- the chemical and physical changes may include in situ reactions that produce removable fluids, composition changes, solubility changes, density changes, phase changes, and/or viscosity changes of the hydrocarbon material within the formation.
- a fluid may be, but is not limited to, a gas, a liquid, an emulsion, a slurry, and/or a stream of solid particles that has flow characteristics similar to liquid flow.
- Thermal processing may increase the permeability of a formation and allow some components (e.g., hydrocarbons, metals and/or residual formation fluids) in the formation to migrate from one area to an area adjacent to the hydrocarbon containing formation. Some of these components may be created during thermal processing of the formation. Such components may be present in higher quantities if the formation, and may be difficult to remove from the hydrocarbon containing formation. Thus there is still a need for improved methods for removal of hydrocarbons, metals, and/or other components from the hydrocarbon containing formation.
- components e.g., hydrocarbons, metals and/or residual formation fluids
- hydrocarbons within a hydrocarbon containing formation may be converted in situ within the formation to yield a mixture of relatively high quality hydrocarbon products, hydrogen, and/or other products.
- One or more heaters may be used to heat a portion of the hydrocarbon containing formation to temperatures that allow pyrolysis of the hydrocarbons.
- Hydrocarbons, hydrogen, and other formation fluids may be removed from the formation through one or more production wells.
- formation fluids may be removed in a vapor phase.
- formation fluids may be removed in liquid, vapor phases or a combination thereof.
- Temperature and pressure in at least a portion of the formation may be controlled during pyrolysis to yield improved products from the formation.
- hydrocarbons may be recovered from a hydrocarbon containing formation before, during, and/or after treatment by injecting a recovery fluid into a portion of the formation.
- the recovery fluid may cause fluids within the formation to be produced.
- the formation fluids may be separated from the recovery fluid at the surface.
- FIG. 1 depicts an illustration of stages of heating a hydrocarbon containing formation.
- FIG. 2 depicts a schematic view of an embodiment of a portion of an in situ conversion system for treating a hydrocarbon containing formation.
- FIG. 3 illustrates a schematic view of multiple heaters branched from a single well in a hydrocarbon containing formation.
- FIG. 4 illustrates an embodiment of a production well placed in a formation.
- FIG. 5 depicts an embodiment of a remediation process used to treat a treatment area.
- FIG. 6 depicts a plan view representation of an embodiment of treatment areas formed by perimeter barriers.
- hydrocarbon containing formation e.g., a formation containing coal (including lignite, sapropelic coal, etc.), oil shale, carbonaceous shale, shungites, kerogen, bitumen, oil, kerogen and oil in a low permeability matrix, heavy hydrocarbons, asphaltites, natural mineral waxes, formations wherein kerogen is blocking production of other hydrocarbons, etc.
- a hydrocarbon containing formation e.g., a formation containing coal (including lignite, sapropelic coal, etc.), oil shale, carbonaceous shale, shungites, kerogen, bitumen, oil, kerogen and oil in a low permeability matrix, heavy hydrocarbons, asphaltites, natural mineral waxes, formations wherein kerogen is blocking production of other hydrocarbons, etc.
- Such formations may be treated to yield relatively high quality hydrocarbon products, hydrogen, and other products.
- Hydrocarbons may also include other elements, such as, but not limited to, halogens, metallic elements, nitrogen, oxygen, and/or sulfur. Hydrocarbons may be, but are not limited to, kerogen, bitumen, pyrobitumen, oils, natural mineral waxes, and asphaltites. Hydrocarbons may be located within or adjacent to mineral matrices within the earth. Matrices may include, but are not limited to, sedimentary rock, sands, silicilytes, carbonates, diatomites, and other porous media. "Hydrocarbon fluids" are fluids that include hydrocarbons.
- Hydrocarbon fluids may include, entrain, or be entrained in non-hydrocarbon fluids (e.g., hydrogen ("H 2 "), nitrogen (“N 2 "), carbon monoxide, carbon dioxide, hydrogen sulfide, water, and ammonia).
- non-hydrocarbon fluids e.g., hydrogen ("H 2 "), nitrogen (“N 2 "), carbon monoxide, carbon dioxide, hydrogen sulfide, water, and ammonia.
- a “formation” includes one or more hydrocarbon containing layers, one or more non-hydrocarbon layers, an overburden, and/or an underburden.
- An “overburden” and/or an “underburden” includes one or more different types of impermeable materials.
- overburden and/or underburden may include rock, shale, mudstone, or wet/tight carbonate (i.e., an impermeable carbonate without hydrocarbons).
- an overburden and/or an underburden may include a hydrocarbon containing layer or hydrocarbon containing layers that are relatively impermeable and are not subjected to temperatures during in situ conversion processing that results in significant characteristic changes of the hydrocarbon containing layers of the overburden and/or underburden.
- an underburden may contain shale or mudstone.
- the overburden and/or underburden may be somewhat permeable.
- formation fluids and “produced fluids” refer to fluids removed from a hydrocarbon containing formation and may include pyrolyzation fluid, synthesis gas, mobilized hydrocarbon, and water (steam).
- mobilized fluid refers to fluids within the formation that are able to flow because of thermal treatment of the formation.
- Formation fluids may include hydrocarbon fluids as well as non-hydrocarbon fluids.
- a "heat source” is any system for providing heat to at least a portion of a formation substantially by conductive and/or radiative heat transfer.
- a heat source may include electric heaters such as an insulated conductor, an elongated member, and/or a conductor disposed within a conduit.
- a heat source may also include heat sources that generate heat by burning a fuel external to or within a formation, such as surface burners, downhole gas burners, flameless distributed combustors, and natural distributed combustors.
- heat provided to or generated in one or more heat sources may be supplied by other sources of energy.
- the other sources of energy may directly heat a formation, or the energy may be applied to a transfer media that directly or indirectly heats the formation. It is to be understood that one or more heat sources that are applying heat to a formation may use different sources of energy.
- some heat sources may supply heat from electric resistance heaters, some heat sources may provide heat from combustion, and some heat sources may provide heat from one or more other energy sources (e.g., chemical reactions, solar energy, wind energy, biomass, or other sources of renewable energy).
- a chemical reaction may include an exothermic reaction (e.g., an oxidation reaction).
- a heat source may include a heater that provides heat to a zone proximate and/or surrounding a heating location such as a heater well.
- a “heater” is any system for generating heat in a well or a near wellbore region.
- Heaters may be, but are not limited to, electric heaters, burners, combustors that react with material in or produced from a formation (e.g., natural distributed combustors), and/or combinations thereof.
- a “unit of heat sources” refers to a number of heat sources that form a template that is repeated to create a pattern of heat sources within a formation.
- wellbore refers to a hole in a formation made by drilling or insertion of a conduit into the formation.
- a wellbore may have a substantially circular cross section, or other cross-sectional shapes (e.g., circles, ovals, squares, rectangles, triangles, slits, or other regular or irregular shapes).
- cross-sectional shapes e.g., circles, ovals, squares, rectangles, triangles, slits, or other regular or irregular shapes.
- opening when referring to an opening in the formation may be used interchangeably with the term “wellbore.”
- Pyrolysis is the breaking of chemical bonds due to the application of heat.
- pyrolysis may include transforming a compound into one or more other substances by heat alone. Heat may be transferred to a section of the formation to cause pyrolysis.
- Pyrolyzation fluids or “pyrolysis products” refers to fluid produced substantially during pyrolysis of hydrocarbons. Fluid produced by pyrolysis reactions may mix with other fluids in a formation. The mixture would be considered pyrolyzation fluid or pyrolyzation product.
- pyrolysis zone refers to a volume of a formation (e.g., a relatively permeable formation such as a tar sands formation) that is reacted or reacting to form a pyrolyzation fluid.
- Thermal conductivity is a property of a material that describes the rate at which heat flows, in steady state, between two surfaces of the material for a given temperature difference between the two surfaces.
- “Dipping” refers to a formation that slopes downward or inclines from a plane parallel to the earth's surface, assuming the plane is flat (i.e., a "horizontal” plane).
- a “dip” is an angle that a stratum or similar feature makes with a horizontal plane.
- a “steeply dipping" hydrocarbon containing formation refers to a hydrocarbon containing formation lying at an angle of at least 20° from a horizontal plane. "Down dip” refers to downward along a direction parallel to a dip in a formation. “Up dip” refers to upward along a direction parallel to a dip of a formation. “Strike” refers to the course or bearing of hydrocarbon material that is normal to the direction of dip.
- Subsidence is a downward movement of a portion of a formation relative to an initial elevation of the surface.
- Thickness of a layer refers to the thickness of a cross section of a layer, wherein the cross section is normal to a face of the layer.
- Thermal fracture refers to fractures created in a formation caused by expansion or contraction of a formation and/or fluids within the formation, which is in turn caused by increasing/decreasing the temperature of the formation and/or fluids within the formation, and/or by increasing/decreasing a pressure of fluids within the formation due to heating.
- Hydrocarbons in formations may be treated in various ways to produce many different products. In certain embodiments, such formations may be treated in stages.
- FIG. 1 illustrates several stages of heating a hydrocarbon containing formation.
- FIG. 1 also depicts an example of yield (barrels of oil equivalent per ton) (y axis) of formation fluids from a hydrocarbon containing formation versus temperature (°C) (x axis) of the formation.
- Desorption of methane and vaporization of water occurs during stage 1 heating. Heating of the formation through stage 1 may be performed as quickly as possible. For example, when a hydrocarbon containing formation is initially heated, hydrocarbons in the formation may desorb adsorbed methane. The desorbed methane may be produced from the formation. If the hydrocarbon containing formation is heated further, water within the hydrocarbon containing formation may be vaporized. Water may occupy, in some hydrocarbon containing formations, between about 10 % to about 50 % of the pore volume in the formation. In other formations, water may occupy larger or smaller portions of the pore volume. Water typically is vaporized in a formation between about
- the vaporized water may produce wettability changes in the formation and/or increase formation pressure.
- the wettabihty changes and/or increased pressure may affect pyrolysis reactions or other reactions in the formation.
- the vaporized water may be produced from the formation. In other embodiments, the vaporized water may be used for steam extraction and/or distillation in the formation or outside the formation.
- Removing the water from and increasing the pore volume in the formation may increase the storage space for hydrocarbons within the pore volume.
- a temperature within the formation reaches (at least) an initial pyrolyzation temperature (e.g., a temperature at the lower end of the temperature range shown as stage 2).
- Hydrocarbons within the formation may be pyrolyzed throughout stage 2.
- a pyrolysis temperature range may vary depending on types of hydrocarbons within the formation.
- a pyrolysis temperature range may include temperatures between about 250 °C and about 900 °C.
- a pyrolysis temperature range for producing desired products may extend through only a portion of the total pyrolysis temperature range.
- a pyrolysis temperature range for producing desired products may include temperatures between about 250 °C to about 400 °C.
- a temperature of hydrocarbons in a formation is slowly raised through a temperature range from about 250 °C to about 400 °C
- production of pyrolysis products may be substantially complete when the temperature approaches 400 °C.
- Heating the hydrocarbon containing formation with a plurality of heat sources may establish thermal gradients around the heat sources that slowly raise the temperature of hydrocarbons in the formation through a pyrolysis temperature range.
- a temperature of the hydrocarbons to be subjected to pyrolysis may not be slowly increased throughout a temperature range from about 250 °C to about 400 °C.
- the hydrocarbons in the formation may be heated to a desired temperature (e.g., about 325 °C). Other temperatures may be selected as the desired temperature.
- Energy input into the formation from the heat sources may be adjusted to maintain the temperature in the formation substantially at the desired temperature.
- the hydrocarbons may be maintained substantially at the desired temperature until pyrolysis declines such that production of desired formation fluids from the formation becomes uneconomical.
- a portion of a hydrocarbon containing formation may be heated at a heating rate in a range from about 0.1 °C/day to about 50 °C/day or, in som embodiments, about 0.1 °C/day to about 10 °C/day.
- a majority of hydrocarbons may be produced from a formation heated at a heating rate within a range of about 0.1 °C/day to about 10 °C/day.
- a hydrocarbon containing formation may be heated at a rate of less than about 0.7 °C/day through a significant portion of a pyrolysis temperature range.
- the pyrolysis temperature range may include a range of temperatures as described in above embodiments.
- the heated portion may be heated at such a rate for a time greater than 50% of the time needed to span the temperature range, more than 75% of the time needed to span the temperature range, or more than 90% of the time needed to span the temperature range.
- Formation fluids including pyrolyzation fluids may be produced from the formation.
- the pyrolyzation fluids may include, but are not limited to, hydrocarbons, hydrogen, carbon dioxide, carbon monoxide, hydrogen sulfide, ammonia, nitrogen, water, and mixtures thereof. As the temperature of the formation increases, the amount of condensable hydrocarbons in the produced formation fluid tends to decrease.
- the formation may produce mostly methane and/or hydrogen. If a hydrocarbon containing formation is heated throughout an entire pyrolysis range, the formation may produce only small amounts of hydrogen towards an upper limit of the pyrolysis range. After all of the available hydrogen is depleted, a minimal amount of fluid production from the formation will typically occur.
- Synthesis gas generation may take place during stage 3 heating depicted in FIG. 1.
- Stage 3 may include heating a hydrocarbon containing formation to a temperature sufficient to allow synthesis gas generation.
- synthesis gas may be produced within a temperature range from about 400 °C to about 1200 °C.
- the temperature of the formation when the synthesis gas generating fluid is introduced to the formation may determine the composition of synthesis gas produced within the formation. If a synthesis gas generating fluid is introduced into a formation at a temperature sufficient to allow synthesis gas generation, synthesis gas may be generated within the formation.
- the generated synthesis gas may be removed from the formation through a production well or production wells. A large volume of synthesis gas may be produced during generation of synthesis gas.
- a hydrocarbon containing formation may be selected for treatment based on additional factors such as, but not limited to, thickness of hydrocarbon containing layers within the formation, assessed liquid production content, location of the formation, and depth of hydrocarbon containing layers.
- a hydrocarbon containing formation may include multiple layers. Such layers may include hydrocarbon containing layers, as well as layers that are hydrocarbon free or have relatively low amounts of hydrocarbons. Conditions during formation may determine the thickness of hydrocarbon and non-hydrocarbon layers in a hydrocarbon containing formation.
- a hydrocarbon containing formation to be subjected to in situ conversion will typically include at least one hydrocarbon containing layer having a thickness sufficient for economical production of formation fluids. Richness of a hydrocarbon containing layer may be a factor used to determine if a formation will be treated by in situ conversion.
- a thin and rich hydrocarbon layer may be able to produce significantly more valuable hydrocarbons than a much thicker, less rich hydrocarbon layer.
- Producing hydrocarbons from a formation that is both thick and rich is desirable.
- the types of fluids producible from the formation may be a factor in the selection of a formation for in situ conversion.
- the quality of the fluids to be produced may be assessed in advance of treatment. Assessment of the products that may be produced from a formation may generate significant cost savings since only formations that will produce desired products needed to be subjected to in situ conversion.
- a method of treating a hydrocarbon containing formation may include selecting a portion of the hydrocarbon containing formation for treatment having hydrocarbons with a hydrogen content greater than about 3 weight %, 3.5 weight %, or 4 weight % when measured on a dry, ash-free basis.
- a part of a hydrocarbon containing formation may include hydrocarbons with an atomic hydrogen to carbon ratio that falls within a range from about 0.5 to about 2, and in many instances from about 0.70 to about 1.65.
- FIG. 2 shows a schematic view of an embodiment of a portion of an in situ conversion system for treating a hydrocarbon containing formation.
- Heat sources 100 may be placed within at least a portion of the hydrocarbon containing formation.
- Heat sources 100 may include, for example, electric heaters such as insulated conductors, conductor-in-conduit heaters, surface burners, flameless distributed combustors, and/or natural distributed combustors. Heat sources 100 may also include other types of heaters.
- Heat sources 100 may provide heat to at least a portion of a hydrocarbon containing formation.
- Energy may be supplied to the heat sources 100 through supply lines 102.
- the supply lines may be structurally different depending on the type of heat source or heat sources being used to heat the formation.
- Supply lines for heat sources may transmit electricity for electric heaters, may transport fuel for combustors, or may transport heat exchange fluid that is circulated within the formation.
- a plurality of heated portions may exist within a unit of heat sources.
- a unit of heat sources refers to a minimal number of heat sources that form a template that is repeated to create a pattern of heat sources within the formation.
- the heat sources may be located within the formation.
- a large spacing may provide for a relatively slow heating rate of hydrocarbon material.
- the slow heating rate may allow for pyrolysis of hydrocarbon material with minimal coking or no coking within the formation away from areas in the vicinity of the heat sources. Heating from heat sources allows the part of the formation to reach pyrolysis temperatures so that all hydrocarbons within the part of the formation may be subject to pyrolysis reactions.
- a majority of pyrolysis fluids are produced when the part of the formation is within a range from about 0 m to about 25 m from a heat source.
- Production wells 104 may be used to remove formation fluid from the formation. Formation fluid produced from production wells 104 may be transported through collection piping 106 to treatment facilities 108. Formation fluids may also be produced from heat sources 100. For example, fluid may be produced from heat sources 100 to control pressure within the formation adjacent to the heat sources. Fluid produced from heat sources
- Treatment facilities 108 may include separation units, reaction units, upgrading units, fuel cells, turbines, storage vessels, and other systems and units for processing produced formation fluids.
- An in situ conversion system for treating hydrocarbons may include barrier wells 1 10 (wells shown with reference number 110 may, in some embodiments, be dewatering wells, freeze wells, capture wells, isolation wells, and/or other types of barriers).
- barrier wells 110 may be vacuum wells that remove liquid water and/or inhibit liquid water from entering a portion of a hydrocarbon containing formation to be heated, or to a formation being heated.
- a plurality of barrier wells 110 may surround all or a portion of a formation to be heated.
- barrier wells 110 are shown extending only along one side of heat sources 100, but barrier wells typically encircle all heat sources 100 used, or to be used, to heat the formation.
- FIG. 3 illustrates a schematic of view of multilateral or side tracked lateral heaters branched from a single well in a hydrocarbon containing formation.
- a hydrocarbon containing formation e.g., in a coal, oil shale, or tar sands formation
- an oil shale layer may have a richness greater than about 0.06 L/kg and a relatively low initial thermal conductivity. Heat provided to a thin layer with a low thermal conductivity from a horizontal wellbore may be more effectively trapped within the thin layer and reduce heat losses from the layer.
- Substantially vertical opening 112 may be placed in hydrocarbon layer 114.
- Substantially vertical opening 112 may be an elongated portion of an opening formed in hydrocarbon layer 114.
- Hydrocarbon layer 114 may be below overburden 116.
- One or more substantially horizontal openings 118 may also be placed in hydrocarbon layer 114
- Horizontal openings 118 may, in some embodiments, contain perforated liners.
- the horizontal openings 118 may be coupled to vertical opening 112.
- Horizontal openings 118 may be elongated portions that diverge from the elongated portion of vertical opening 1 12.
- Horizontal openings 118 may be formed in hydrocarbon layer 114 after vertical opening 112 has been formed.
- horizontal openings 1 18 may be angled upwards to facilitate flow of formation fluids towards the production conduit.
- Heat sources 100 may be positioned in horizontal openings 118.
- Each horizontal opening 118 may lie above or below an adjacent horizontal opening.
- six horizontal openings 118 may be formed in hydrocarbon layer 114.
- Three horizontal openings 118 may face 180°, or in a substantially opposite direction, from three additional horizontal openings 118.
- Two horizontal openings facing substantially opposite directions may lie in a substantially identical vertical plane within the formation.
- Any number of horizontal openings 118 may be coupled to a single vertical opening 112, depending on, but not limited to, a thickness of hydrocarbon layer 114, a type of formation, a desired heating rate in the formation, and a desired production rate.
- Production conduit 120 may be placed substantially vertically within vertical opening 112.
- Production conduit 120 may be substantially centered within vertical opening 112.
- Pump 122 may be coupled to production conduit 120.
- Such pump may be used, in some embodiments, to pump formation fluids from the bottom of the well.
- Pump 122 may be a rod pump, progressing cavity pump (PCP), centrifugal pump, jet pump, gas lift pump, submersible pump, rotary pump, etc.
- FIG. 4 illustrates an embodiment of production well 104 placed in hydrocarbon layer 114.
- Production well 104 may be used to produce formation fluids from hydrocarbon layer 114.
- Hydrocarbon layer 114 may be treated using an in situ conversion process.
- Production conduit 120 may be placed within production well 104.
- production conduit 120 is a hollow sucker rod placed in production well 104.
- Production well 104 may have a casing, or lining, placed along the length of the production well. The casing may have openings, or perforations, to allow formation fluids to enter production well 104.
- Formation fluids may include vapors and/or liquids.
- Production conduit 120 and production well 104 may include non-corrosive materials such as steel.
- production conduit 120 may include heat source 100.
- Heat source 100 may be a heater placed inside or outside production conduit 120 or formed as part of the production conduit.
- Heat source 100 may be a heater such as an insulated conductor heater, a conductor-in-conduit heater, or a skin-effect
- Pump 122 may be coupled to production conduit 120. Pump 122 may be used to pump formation fluids from hydrocarbon layer 114 into production conduit 120. Pump 122 may be any pump used to pump fluids, such as a rod pump, PCP, jet pump, gas lift pump, centrifugal pump, rotary pump, or submersible pump. Pump 122 may be used to pump fluids through production conduit 120 to a surface of the formation above overburden 116.
- a mixture may be produced from a hydrocarbon containing formation.
- the mixture may be produced through a heater well disposed in the formation. Producing the mixture through the heater well may increase a production rate of the mixture as compared to a production rate of a mixture produced through a non-heater well.
- a non-heater well may include a production well.
- a production well may be heated to increase a production rate.
- an average temperature within a majority of a part of the formation may be assessed by measuring temperature within a wellbore or wellbores.
- the wellbore may be a production well, heater well, or monitoring well.
- the temperature within a wellbore may be measured to monitor and/or determine operating conditions within the part of the formation.
- the measured temperature may be used as a property for input into a program for controlling production within the formation.
- a measured temperature may be used as input for a software executable on a computational system.
- a temperature within a wellbore may be measured using a moveable thermocouple.
- the moveable thermocouple may be disposed in a conduit of a heater or heater well.
- a valve system may maintain, alter, and/or control a pressure within a heated portion of a hydrocarbon containing formation.
- a heat source disposed within a hydrocarbon containing formation may be coupled to a valve.
- the valve may release fluid from the formation through the heat source.
- a pressure valve may be coupled to a production well within the hydrocarbon containing formation.
- fluids released by the valves may be collected and transported to a surface unit for further processing and/or treatment.
- a large portion of the total organic carbon content of a formation may be converted into hydrocarbon containing fluids.
- up to about 20 weight % of the total organic carbon content of hydrocarbons in the portion may be transformed into hydrocarbon fluids.
- the weight percentage of total organic carbon content of hydrocarbons in the portion removed during the in situ process may be significantly increased if synthesis gas is generated within the portion.
- heating of the part of the formation may be controlled to pyrolyze at least about 20 weight % (or in some embodiments about 25 weight %) of the hydrocarbons within the part of the formation. Conversion of selected portions of hydrocarbon layers within a formation may be avoided to inhibit subsidence of the formation. Heating at least a portion of a formation may cause some of the hydrocarbons within the portion to pyrolyze. Pyrolyzation may generate hydrocarbon fragments. The hydrocarbon fragments may be reactive and may react with other compounds in the formation and/or with other hydrocarbon fragments produced by pyrolysis. Reaction of the hydrocarbon fragments with other compounds and/or with each other, however, may reduce production of a selected product. A reducing agent in, or provided to, the portion of the formation during heating may increase production of the selected product. The reducing agent may be, but is not limited to, H 2) methane, and/or other non-condensable hydrocarbon fluids.
- molecular hydrogen may be provided to the formation to create a reducing environment. Hydrogenation reactions between the molecular hydrogen and some of the hydrocarbons within a portion of the formation may generate heat. The heat may heat the portion of the formation.
- Molecular hydrogen may also be generated within the portion of the formation.
- the generated H 2 may hydrogenate hydrocarbon fluids within a portion of a formation.
- the hydrogenation may generate heat that transfers to the formation to maintain a desired temperature within the formation.
- heating the formation may result in an increase in the thermal conductivity of a part of the heated portion.
- porosity and permeability within a part of the portion may increase substantially during heating such that heat may be transferred through the formation not only by conduction, but also by convection and/or by radiation from a heat source.
- Such radiant and convective transfer of heat may increase an apparent thermal conductivity of the part of the formation and, consequently, the thermal diffusivity.
- the large apparent thermal diffusivity may make heating at least a portion of a hydrocarbon containing formation from heat sources feasible.
- a combination of conductive, radiant, and/or convective heating may accelerate heating. Such accelerated heating may significantly decrease a time required for producing hydrocarbons and may significantly increase the economic feasibility of commercialization of the in situ conversion process.
- the in situ conversion process may generate molecular hydrogen during the pyrolysis process.
- pyrolysis tends to increase the porosity/void spaces in the formation.
- Void spaces in the formation may contain hydrogen gas generated by the pyrolysis process.
- Hydrogen gas may have about six times the thermal conductivity of nitrogen or air. The presence of hydrogen in void spaces may raise the thermal conductivity of the formation and decrease the effect of mass removal from the formation on thermal conductivity.
- Some in situ conversion process embodiments may be able to economically treat formations that were previously believed to be uneconomical to produce.
- thermal conductivity is about 0.2 W/(m °C) or below, and thermal diffusivity is below about 1.7 x 10 "3 cm /s).
- thermal conductivity is about 0.2 W/(m °C) or below, and thermal diffusivity is below about 1.7 x 10 "3 cm /s).
- thermal diffusivity is below about 1.7 x 10 "3 cm /s.”
- hydrocarbon containing resources e.g., coal
- hydrocarbon containing resources e.g., coal
- the thermal conductivity and thermal diffusivity are significantly higher (e.g., thermal conductivity at or above about 0.5 W/(m °C) and thermal diffusivity at or above 4.1 x 10 "3 cm 2 /s) than would be expected based on previous literature, such as government report No. 8364.
- the coal does not act as "an excellent thermal insulator.” Instead, heat can and does transfer and/or diffuse into the formation at significantly higher (and better) rates than would be expected according to the literature, thereby significantly enhancing economic viability of treating the formation.
- Heating the formation from heat sources placed in the formation may allow a permeability of the heated portion of a hydrocarbon containing formation to be substantially uniform.
- a substantially uniform permeability may inhibit channeling of formation fluids in the formation and allow production from substantially all portions of the heated formation.
- An assessed (e.g., calculated or estimated) permeability of any selected portion in the formation having a substantially uniform permeability may not vary by more than a factor of 10 from an assessed average permeability of the selected portion.
- Permeability of a part within the heated portion of the hydrocarbon containing formation may rapidly increase when the part of the formation is heated by conduction.
- a permeability of an impermeable hydrocarbon containing formation may be less than about 0.1 millidarcy (9.9 x 10 "17 m 2 ) before treatment.
- pyrolyzing at least a portion of a hydrocarbon containing formation may increase a permeability within a part of the portion to greater than about 10 millidarcy, 100 millidarcy, 1 darcy, 10 darcy, 20 darcy, or 50 darcy.
- a permeability of a part of the portion may increase by a factor of more than about 100, 1,000, 10,000, 100,000 or more.
- substantially uniform heating means heating such that temperature in a majority of the section does not vary by more than 100 °C from an assessed average temperature in the majority of the part of the formation (volume) being treated.
- Hydrocarbons may be removed from micropores within a portion of the formation due to heating.
- Micropores may be generally defined as pores having a cross-sectional dimension of less than about 1000 A. Removal of solid hydrocarbons may result in a substantially uniform increase in porosity within at least a part of the heated portion. Heating the portion of a hydrocarbon containing formation may substantially uniformly increase a porosity of a part within the heated portion.
- substantially uniform porosity means that the assessed (e.g., calculated or estimated) porosity of any selected portion in the formation does not vary by more than about 25% from the assessed average porosity of such selected portion.
- Physical characteristics of a portion of a hydrocarbon containing formation after pyrolysis may be similar to those of a porous bed.
- the physical characteristics of a formation subjected to an in situ conversion process may significantly differ from physical characteristics of a hydrocarbon containing formation subjected to injection of gases that burn hydrocarbons to heat the hydrocarbons and or to formations subjected to steam flood production. Gases injected into virgin or fractured formations may channel through the formation. The gases may not be uniformly distributed throughout the formation.
- a gas injected into a portion of a hydrocarbon containing formation subjected to an in situ conversion process may readily and substantially uniformly contact the carbon and/or hydrocarbons remaining in the formation. Gases produced by heating the hydrocarbons may be transferred a significant distance within the heated portion of the formation with minimal pressure loss.
- Transfer of gases in a formation over significant distances may be particularly advantageous to reduce the number of production wells needed to produce formation fluid from the formation.
- a first portion of a hydrocarbon containing formation may be subjected to an in situ conversion process.
- the volume of the formation subjected to in situ conversion may be expanded by heating abutting portions of the hydrocarbon containing formation.
- Formation fluid produced in the abutting portions of the formation may be produced from production wells in the first portion. If needed, a few additional production wells may be installed in the abutting portions of formation, but such production wells may have large separation distances.
- the ability to transfer fluid in a formation over long distances may be advantageous for treating a steeply dipping hydrocarbon containing formation.
- Production wells may be placed in an upper portion of the dipping hydrocarbon production.
- Heat sources may be inserted into the steeply dipping formation.
- the heat sources may follow the dip of the formation.
- the upper portion may be subjected to thermal treatment by activating portions of the heat sources in the upper portion.
- Abutting portions of the steeply dipping formation may be subjected to thermal treatment after treatment in the upper portion increases the permeability of the formation so that fluids in lower portions may be produced from the upper portions.
- Synthesis gas may be produced from a portion of a hydrocarbon containing formation.
- Synthesis gas may be produced from coal, oil shale, other kerogen containing formations, heavy hydrocarbons (tar sands, etc.) and other bitumen containing formations.
- the hydrocarbon containing formation may be heated prior to synthesis gas generation to produce a substantially uniform, relatively high permeability formation.
- synthesis gas production may be commenced after production of pyrolysis fluids has been exhausted or becomes uneconomical. Alternatively, synthesis gas generation may be commenced before substantial exhaustion or uneconomical pyrolysis fluid production has been achieved if production of synthesis gas will be more economically favorable. Formation temperatures will usually be higher than pyrolysis temperatures during synthesis gas generation.
- Raising the formation temperature from pyrolysis temperatures to synthesis gas generation temperatures allows further utilization of heat applied to the formation to pyrolyze the formation. While raising a temperature of a formation from pyrolysis temperatures to synthesis gas temperatures, methane and/or H 2 may be produced from the formation.
- Thermal processing may increase the permeability of a formation and allow some components (e.g., hydrocarbons, metals and/or residual formation fluids) in the formation to migrate from a treatment area to areas adjacent to the formation. Some of these components may be created during thermal processing of the formation. Such components may be present in higher quantities if the formation is not subjected to a synthesis gas generation cycle after pyrolysis.
- a recovery fluid may be introduced into the formation to remove some of the components. The recovery fluid may be provided to the formation prior to and/or after cooling of the formation has begun.
- the recovery fluid may include, but is not limited to, water, steam, hydrogen, carbon dioxide, air, hydrocarbons (e.g., methane, ethane, and/or propane), and/or a combustible gas.
- the provided recovery fluid may be recycled from another portion of the formation, another formation, and/or the portion of the formation being treated.
- a portion of the recovery fluid may react with one or more materials in the formation to volatize and/or neutralize at least some of the material.
- the recovery fluid may force components in the formation to be produced. After production the recovery fluid may be provided to an energy producing unit (e.g. turbine or combustor). For example, methane may be provided to a portion of the formation.
- an energy producing unit e.g. turbine or combustor
- Heat within the formation may transfer to the methane.
- the methane may cause production of a mixture including heavier hydrocarbons (e.g., benzene, toluene, ethyl benzene and/or xylenes).
- the mixture may be provided to a turbine, where some of the mixture is combusted to produce electricity.
- water may be provided to the formation as a recovery fluid. Steam produced from the water may entrain, distill, and/or drive components within the formation to production wells.
- organic components may be produced from the formation either by steam distillation and/or entrainment in steam.
- inorganic components may be entrained and produced in condensed water in the formation.
- Barriers may include, but are not limited to a frozen barrier, a low temperature barrier, a grout wall, dewatering wells, a sulfur cement barrier, a barrier formed by a gel produced in the formation, a barrier formed by precipitation of salts in the formation, a barrier formed by a polymerization reaction in the formation, sheets driven into the formation, or combinations thereof.
- a plurality of barrier wells 1 10 may be used to form barrier zone 132 as depicted in FIG. 5.
- barrier wells 110 are freeze wells and barrier zone 132 is frozen barrier or a low temperature barrier zone.
- Barrier zone 132 may define a volume to be treated within hydrocarbon containing material 134.
- Barrier zone 132 may inhibit fluid flow into or out of treatment area 136.
- a recovery fluid may be introduced into the formation near barrier wells 1 10 after treatment is complete.
- Injection wells 138 used for injection of the recovery fluid may include, but are not limited to, pumping wells, heat sources, freeze wells, dewatering wells, and/or production wells that have been converted into injection wells.
- wells used previously may have a sealed casing. The sealed casing may be perforated to permit fluid communication between the well and the surrounding formation.
- Recovery fluid may move some of the components in the formation towards one or more removal wells 140.
- Removal wells 140 may include wells that were converted from heat sources and/or production wells.
- a recovery fluid may be introduced into a treatment area through an innermost production well, or a production well ring, that is converted into an injection well.
- the recovery fluid may be introduced into the formation after the barrier zone has been partially thawed.
- thermal energy may be removed from the frozen barrier by circulating various fluids through the freeze well.
- a warm refrigerant may be injected into the freeze well system to be cooled and used in a surface treatment unit, a freeze well system, and/or other treatment area.
- various other fluids e.g., water, substantially non-reactive gas, etc.
- Thawed freeze wells that are exposed may be converted for use as injection wells to introduce recovery fluid into the formation.
- Introduction of the recovery fluid may heat the region adjacent to the inner row of freeze wells to an average temperature of less than a pyrolysis temperature of hydrocarbon material in the formation.
- the heat from the recovery fluid may move mobilized hydrocarbon and inorganic components. Movement of the hydrocarbon and inorganic components may be due in part to steam distillation of the fluids and/or entrainment.
- Introducing the recovery fluid at a point where the formation was previously frozen ensures that the hydrocarbon material at the injection well is unaltered.
- the unaltered hydrocarbon material may be essentially in its original natural state.
- the injected fluid may move from a natural zone to the previously treated area and be produced.
- wells previously frozen in a frozen barrier zone such as a pumping well, may be thawed and used as an injection well.
- a volume of recovery fluid required to remediate a treatment area may be greater than about one pore volume of the treatment area. Two pore volumes or more of recovery fluid may be introduced to remediate the treatment area.
- injection of a recovery fluid to remediate a treatment area may continue until concentrations of components in the removed recovery fluid are at acceptable levels deemed appropriate for a site. These acceptable levels may be based on base line surveys, regulatory requirements, future potential uses of the site, geology of the site, and accessibility. After one or more components within a treatment area are removed or reduced to acceptable levels, the treatment system for the formation may be deactivated.
- freeze wells have been utilized and if a new barrier zone around a new treatment area is to be formed, heat may be transferred between hydrocarbon containing material, in which a new barrier zone is to be formed, and the initial freeze wells using a circulated heat transfer fluid.
- Using deactivated freeze wells to cool hydrocarbon containing material in which a low temperature zone is to be formed may allow for recovery of some of the energy expended to form and maintain the initial barrier.
- using thermal energy extracted from the initial barrier to cool hydrocarbon material in which a new barrier zone is to be formed may significantly decrease a cost of forming the new barrier.
- a low temperature zone may be allowed to reach thermal equilibrium with a surrounding formation naturally.
- a frozen barrier may include an inner ring of freeze wells directly adjacent to the treatment area and an outer ring of freeze wells directly adjacent to the untreated area.
- a region of the formation near the freeze wells may remain at a temperature below the freezing point of water during pyrolysis and synthesis gas generation.
- organic components from pyrolysis may migrate through thermal fractures to a region adjacent to the inner row of freeze wells. The contaminants may become immobilized in fractures and pores in the region due to the relatively low temperatures of the region. Migration of contaminants from the treatment area may be reduced or prevented by inhibiting groundwater flow through the treatment area. For example, groundwater flow may be inhibited using a barrier.
- Barriers may include, but are not limited to naturally occurring portions (e.g., overburden and/or underburden), freeze wells, frozen barrier zones, low temperature barrier zones, grout walls, sulfur wells, dewatering wells, injection wells, a barrier formed by a gel produced in the formation, a barrier formed by precipitation of salts in the formation, a barrier formed by a polymerization reaction in the formation, sheets driven into the formation, or combinations thereof.
- portions e.g., overburden and/or underburden
- freeze wells frozen barrier zones, low temperature barrier zones, grout walls, sulfur wells, dewatering wells, injection wells, a barrier formed by a gel produced in the formation, a barrier formed by precipitation of salts in the formation, a barrier formed by a polymerization reaction in the formation, sheets driven into the formation, or combinations thereof.
- Each treatment area 136 may be a volume of formation that is, is to be, or has been subjected to an in situ conversion process.
- Perimeter barrier 144 may include installed portions and naturally occurring portions of the formation. Naturally occurring portions of the formation that form part of a perimeter barrier may include substantially impermeable layers of the formation.
- barriers may define the treatment area. Alternatively, barriers may be provided to a portion of the treatment area. Installed portions of perimeter barrier 144 may be formed as needed to define separate treatment areas 136.
- ICP In situ conversion process
- ICP wells 142 may include heat sources, production wells, treatment area dewatering wells, monitor wells, and other types of wells used during in situ conversion. Different treatment areas 136 may share common barrier sections to minimize the length of perimeter barrier 144 that needs to be formed. Perimeter barrier 144 may inhibit fluid migration into treatment area 136 undergoing in situ conversion. For example, perimeter barrier 144 may inhibit formation water from migrating into treatment area 136. Formation water typically includes water and dissolved material in the water (e.g., salts).
- Perimeter barrier 144 may inhibit undesired migration of formation fluids out of treatment area 136 during an in situ conversion process.
- a first treatment area may be undergoing pyrolysis
- a second treatment area adjacent to the first treatment area may be undergoing synthesis gas generation
- a third treatment area adjacent to the first treatment area and/or the second treatment area may be subjected to an in iitu solution mining process.
- Operating conditions within the different treatment areas may be at different temperatures, pressures, production rates, heat injection rates, etc.
- Defining a limited volume of a formation with a perimeter barrier 144 may allow operating conditions within the limited volume to be more readily controlled before, during, and/or after treatment.
- a hydrocarbon containing layer may be located in a portion of the formation that is permeable and/or fractured.
- perimeter barrier 144 Without perimeter barrier 144, formation fluid produced during in situ conversion might migrate out of the volume of formation being treated. Flow of formation fluid out of the volume of formation being treated may inhibit the ability to maintain a desired pressure within the portion of the formation being treated. Thus, defining a limited volume of formation that is to be treated by using perimeter barrier 144 may allow the pressure within the limited volume to be controlled. Controlling the amount of fluid removed from treatment area 136 through pressure relief wells, production wells and/or heat sources may allow pressure within the treatment area to be controlled.
- pressure relief wells are perforated casings placed within or adjacent to wellbores of heat sources that have sealed casings, such as flameless distributed combustors.
- perimeter barriers e.g., frozen barriers and grout walls
- Uncontrolled flow or migration of formation fluid out of treatment area 136 may adversely affect the ability to efficiently maintain a desired temperature within the treatment area.
- Perimeter barrier 144 may inhibit migration of hot formation fluid out of treatment area 136. Inhibiting fluid migration through the perimeter of treatment area 136 may limit convective heat losses to heat loss in fluid removed from the formation through production wells and/or fluid removed to control pressure within the treatment area. Further modifications and alternative embodiments of various aspects of the invention may be apparent to those skilled in the art in view of this description.
Abstract
Description
Claims
Priority Applications (1)
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---|---|---|---|
AU2002356854A AU2002356854A1 (en) | 2001-10-24 | 2002-10-24 | Remediation of a hydrocarbon containing formation |
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US33456801P | 2001-10-24 | 2001-10-24 | |
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WO2003035811A9 true WO2003035811A9 (en) | 2003-07-03 |
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PCT/US2002/034536 WO2003036039A1 (en) | 2001-10-24 | 2002-10-24 | In situ production of a blending agent from a hydrocarbon containing formation |
PCT/US2002/034266 WO2003036040A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor |
PCT/US2002/034209 WO2003036034A1 (en) | 2001-10-24 | 2002-10-24 | Coductor-in-conduit heat sources with an electrically conductive material in the overburden |
PCT/US2002/034198 WO2003036030A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing and upgrading of produced hydrocarbons |
PCT/US2002/034274 WO2003036041A2 (en) | 2001-10-24 | 2002-10-24 | In situ recovery from a hydrocarbon containing formation using barriers |
PCT/US2002/034023 WO2003040513A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation |
PCT/US2002/034263 WO2003036035A2 (en) | 2001-10-24 | 2002-10-24 | In situ upgrading of coal |
PCT/US2002/034264 WO2003035801A2 (en) | 2001-10-24 | 2002-10-24 | Producing hydrocarbons and non-hydrocarbon containing materials from a hydrocarbon containing formation |
PCT/US2002/034207 WO2003036033A1 (en) | 2001-10-24 | 2002-10-24 | Simulation of in situ recovery from a hydrocarbon containing formation |
PCT/US2002/034210 WO2003035811A1 (en) | 2001-10-24 | 2002-10-24 | Remediation of a hydrocarbon containing formation |
PCT/US2002/034384 WO2003036037A2 (en) | 2001-10-24 | 2002-10-24 | Installation and use of removable heaters in a hydrocarbon containing formation |
PCT/US2002/034265 WO2003036036A1 (en) | 2001-10-24 | 2002-10-24 | In situ recovery from lean and rich zones in a hydrocarbon containing formation |
PCT/US2002/034212 WO2003036024A2 (en) | 2001-10-24 | 2002-10-24 | Method and system for in situ heating a hydrocarbon containing formation by a u-shaped opening |
PCT/US2002/034533 WO2003036038A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well |
PCT/US2002/034272 WO2003036043A2 (en) | 2001-10-24 | 2002-10-24 | Forming openings in a hydrocarbon containing formation using magnetic tracking |
PCT/US2002/034203 WO2003036032A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation to produce heated fluids |
PCT/US2002/034201 WO2003036031A2 (en) | 2001-10-24 | 2002-10-24 | Seismic monitoring of in situ conversion in a hydrocarbon containing formation |
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Application Number | Title | Priority Date | Filing Date |
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PCT/US2002/034536 WO2003036039A1 (en) | 2001-10-24 | 2002-10-24 | In situ production of a blending agent from a hydrocarbon containing formation |
PCT/US2002/034266 WO2003036040A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor |
PCT/US2002/034209 WO2003036034A1 (en) | 2001-10-24 | 2002-10-24 | Coductor-in-conduit heat sources with an electrically conductive material in the overburden |
PCT/US2002/034198 WO2003036030A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing and upgrading of produced hydrocarbons |
PCT/US2002/034274 WO2003036041A2 (en) | 2001-10-24 | 2002-10-24 | In situ recovery from a hydrocarbon containing formation using barriers |
PCT/US2002/034023 WO2003040513A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation |
PCT/US2002/034263 WO2003036035A2 (en) | 2001-10-24 | 2002-10-24 | In situ upgrading of coal |
PCT/US2002/034264 WO2003035801A2 (en) | 2001-10-24 | 2002-10-24 | Producing hydrocarbons and non-hydrocarbon containing materials from a hydrocarbon containing formation |
PCT/US2002/034207 WO2003036033A1 (en) | 2001-10-24 | 2002-10-24 | Simulation of in situ recovery from a hydrocarbon containing formation |
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Application Number | Title | Priority Date | Filing Date |
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PCT/US2002/034384 WO2003036037A2 (en) | 2001-10-24 | 2002-10-24 | Installation and use of removable heaters in a hydrocarbon containing formation |
PCT/US2002/034265 WO2003036036A1 (en) | 2001-10-24 | 2002-10-24 | In situ recovery from lean and rich zones in a hydrocarbon containing formation |
PCT/US2002/034212 WO2003036024A2 (en) | 2001-10-24 | 2002-10-24 | Method and system for in situ heating a hydrocarbon containing formation by a u-shaped opening |
PCT/US2002/034533 WO2003036038A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well |
PCT/US2002/034272 WO2003036043A2 (en) | 2001-10-24 | 2002-10-24 | Forming openings in a hydrocarbon containing formation using magnetic tracking |
PCT/US2002/034203 WO2003036032A2 (en) | 2001-10-24 | 2002-10-24 | In situ thermal processing of a hydrocarbon containing formation to produce heated fluids |
PCT/US2002/034201 WO2003036031A2 (en) | 2001-10-24 | 2002-10-24 | Seismic monitoring of in situ conversion in a hydrocarbon containing formation |
Country Status (7)
Country | Link |
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US (16) | US7051808B1 (en) |
CN (9) | CN1575377B (en) |
AU (11) | AU2002360301B2 (en) |
CA (10) | CA2462794C (en) |
IL (4) | IL161172A0 (en) |
NZ (6) | NZ532089A (en) |
WO (17) | WO2003036039A1 (en) |
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