CA2552049C - Orthoester compositions and methods of use in subterranean applications - Google Patents

Orthoester compositions and methods of use in subterranean applications Download PDF

Info

Publication number
CA2552049C
CA2552049C CA002552049A CA2552049A CA2552049C CA 2552049 C CA2552049 C CA 2552049C CA 002552049 A CA002552049 A CA 002552049A CA 2552049 A CA2552049 A CA 2552049A CA 2552049 C CA2552049 C CA 2552049C
Authority
CA
Canada
Prior art keywords
orthoester
particulates
acid
filter cake
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA002552049A
Other languages
French (fr)
Other versions
CA2552049A1 (en
Inventor
Keith A. Frost
Gary P. Funkhouser
Bessie Nita Q. Citrowske
Bradley L. Todd
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Halliburton Energy Services Inc
Original Assignee
Halliburton Energy Services Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Halliburton Energy Services Inc filed Critical Halliburton Energy Services Inc
Priority to CA002683210A priority Critical patent/CA2683210A1/en
Publication of CA2552049A1 publication Critical patent/CA2552049A1/en
Application granted granted Critical
Publication of CA2552049C publication Critical patent/CA2552049C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
    • C09K8/805—Coated proppants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
    • 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
    • Y10S507/00—Earth boring, well treating, and oil field chemistry
    • Y10S507/906—Solid inorganic additive in defined physical form
    • 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
    • Y10S507/00—Earth boring, well treating, and oil field chemistry
    • Y10S507/922—Fracture fluid
    • Y10S507/924—Fracture fluid with specified propping feature
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • Y10T428/2996—Glass particles or spheres

Abstract

The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole, for example, to at least partially degrade the acid-soluble portions of filter cakes deposited in subterranean formations. In one embodiment, the present invention provides a method of degrading an acid-soluble portion of a filter cake comprising contacting the acid-soluble portion of the filter cake with an acid generated from an orthoester.

Description

ORTHOESTER COMPOSITIONS AND METHODS
OF USE IN SUBTERRANEAN APPLICATIONS
BACKGROUND OF THE INVENTION
The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole, for example, to at least partially degrade the acid-soluble portions of filter cakes deposited in subterranean formations.
Filter cakes, e.g., residues deposited on permeable media when servicing fluids contact those media under pressure, are formed in a variety of subterranean operations such as drilling, fracturing, and gravel packing. A filter cake is often desirable, at least temporarily, as it may prevent a fluid from flowing from a desired location to the surrounding subterranean formation. Moreover, the presence of a filter cake may add strength and stability to the formation surfaces on which the filter cake forms.
Filter cakes can form in many subterranean processes. For example, a drill-in fluid in an open hole can form a filter cake. Such filter cakes generally comprise an acid-soluble portion and a polymeric portion. Filter cakes also may be formed during a fracturing operation. As a fracture is created, a portion of the fluid contained in the viscous fracturing fluid may create a filter cake comprising deposited viscosifier and/or fluid loss control additives, ihte~ alia, on the walls of the fracture and/or the formation.
No matter which process forms a filter cake, the filter cake generally acts as a physical barrier to fluid flow that may reduce fluid loss into the producing zone. The filter cake also presents a barrier to flow of liquid from the zone; thus, at some point before the well is put into production, the filter cake generally is removed so that the formation may be placed on production.
While filter cakes may be beneficial, it is generally necessary to remove filter cakes from producing zones once the well is placed into production. For example, to degrade the acid-soluble portion of a drill-in fluid filter cake, a conventional delayed-release acid system usually may be used. A common type of delayed-release acid system comprises esters that slowly hydrolyze to form acids that may ultimately degrade the acid-soluble portion of the filter cake. These delayed-release acid systems, however, can be problematic if they degrade the acid-soluble component of the filter cake too slowly or too quickly.
Removal of only 1 to 2% of the bridging solids in the filter cake can result in a significant loss of fluid to the surrounding formation. If a delayed-release acid system is designed not to dissolve more than 1 % or 2% of the acid-soluble portion of the filter cake in a chosen period of time (e.g., a 12-hour period), then total removal may take days, if not weeks. This is undesirable. On the other hand, if a delayed-release acid system is designed to totally degrade the acid-soluble portion within an acceptable "total cleanup time" (e.g., 24 to 4~ hours), it is likely to cause hole instability and potential fluid loss problems during gravel pack placement. To control such fast-acting delayed-release acid systems, buffers (which are mixtures of weak acids and their conjugate bases) may be considered to achieve a delayed interaction of the acid with the acid-soluble portion of the filter cake for a desired time period. However, such conventional buffer systems have met with little success when used with these delayed-release acid systems, iate~ alia, because the esters may undergo acid- or base-catalyzed hydrolysis at pHs much below or above 7. Also, conventional buffers may suffer when exposed to components, such as calcium carbonate, in the filter cake and, as a result, the acid component of the buffer may be quickly consumed.
SUMMARY OF THE INVENTION
The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole, for example, to at least partially degrade the acid-soluble portions of filter cakes deposited in subterranean formations.
In one embodiment, the present invention provides a method of degrading an acid-soluble portion of a filter cake comprising contacting the acid-soluble portion of the filter cake with an acid generated from an orthoester.
In another embodiment, the present invention provides a method of generating an acid in a subterranean formation comprising the steps of providing an orthoester composition that comprises an orthoester; placing the orthoester composition in the formation;
and allowing the orthoester to generate an acid in the formation.
In another embodiment, the present invention provides a method of degrading an acid-soluble component in a subterranean formation comprising the steps of providing an orthoester composition that comprises an orthoester; placing the orthoester composition in the formation; allowing the orthoester to generate a generated acid; and allowing the generated acid to at least partially degrade the acid soluble component.
In another embodiment, the present invention provides a method of degrading a filter cake in a subterranean formation comprising the steps of providing particulates coated or impregnated with an orthoester composition that comprises an orthoester;
placing the paxticulates into the subterranean formation so that they are substantially adjacent to the filter cake; allowing the orthoester to generate a generated acid; and allowing the generated acid to degrade at least a portion of an acid-soluble portion of the filter cake.
In another embodiment, the present invention provides a composition capable of degrading an acid soluble component in a subterranean formation comprising an orthoester that will generate an acid that is capable of degrading at least a portion of the acid soluble component.
The features and advantages of the present invention will be readily apparent to those skilled in the art upon a reading of the description of the preferred embodiments, which follows.
DESCRIPTION OF PREFERRED EMBODIMENTS
The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole, for example, to at least partially degrade the acid-soluble portions of filter cakes deposited in subterranean formations. One of the desirable features of the compositions and methods of the present invention is that they provide for the delayed release of an acid. The compositions and methods of the present invention are suitable for any application wherein it is desirable to generate an acid downhole that may be useful. Another instance where these compositions and methods may be useful is for reducing the viscosity of a viscosified treatment fluid.
In certain embodiments wherein the compositions and methods of the present invention are used to degrade a filter cake, one of the many benefits offered by the present invention includes the fact that the well does not need to be shut-in for long periods of time to accomplish a substantial, beneficial degradation of the filter cake so as to be able to put the well into production. With the compositions and methods of the present invention, a desirable degradation of a filter cake can be obtained in a highly desirable period of time.
The orthoester compositions of the present invention comprise orthoesters.
These orthoesters will generate acids that will degrade the acid-soluble portion of a filter cake.
Examples of suitable orthoesters have a structure defined by the formula:
RC(OR')(OR")(OR"'), wherein R', R", and R"' are not hydrogen, and R', R", and R"' may or may not be the same group. R', R", or R"' may comprise a heteroatom that may affect the solubility of the chosen orthoester in a given application. Suitable heteroatoms could include nitrogen or oxygen. Examples of suitable orthoesters and poly(orthoesters) include, but are not limited to, orthoacetates, such as trimethyl orthoacetate, triethyl orthoacetate, tripropyl orthoacetate, triisopropyl orthoacetate, and poly(orthoacetates);
orthoformates, such as trimethyl orthoformate, triethyl orthoformate, tripropyl orthoformate, triisopropyl orthoformate, and poly(orthoformates); and orthopropionates, such as trimethyl orthopropionate, triethyl orthopropionate, tripropyl orthopropionate, triisopropyl orthopropionate, and poly(orthopropionates). Suitable orthoesters also may be orthoesters of polyfunctional alcohols, such as glycerin and/or ethylene glycol. Those skilled in the art with the benefit of this disclosure will recognize suitable orthoesters that may be used in a desired application. In choosing an orthoester, one should be mindful that some orthoesters have low flash points. Therefore, the choice of which particular orthoester to use should be guided by such considerations as environmental factors. The orthoester may comprise less than about 1 % to about 100% of the orthoester composition.
To allow the orthoester to hydrolyze to produce an acid, a source of water is needed.
The water should be present in an amount from about 2 moles of water for about every 1 mole of orthoester to an excess of water, which may help ensure the solubility of the reaction product of the reaction between the generated acid and the acid-soluble component, e.g., solubility with the acid-soluble portion of a filter cake. One of ordinary skill in the art with the benefit of this disclosure will recognize whether a suitable amount of water is present in either the orthoester composition or in the well bore for a desired application.
The orthoester compositions of the present invention also may comprise an inhibitor, which may delay the generation of the acid from the orthoester of the orthoester composition and also may neutralize the generated acid during the delay period. Suitable inhibitors include bases. Examples of some preferred inhibitors may include sodium hydroxide, potassium hydroxide, amines such as hexamethylenetetramine, sodium carbonate, and combinations thereof. In certain embodiments, a small amount of a strong base as opposed to a large amount of a relatively weak base is preferred to achieve the delayed generation of the acid and the neutralization of the generated acid for a desired delay period.
The orthoester compositions of the present invention can have any suitable form. For instance, these compositions can be used in a solution form, a gel form, or an emulsion form.
In certain applications, a solution form may be useful, e.g., when a faster break of a treatment fluid or a faster degradation of a filter cake, is desired; in other applications, e.g., when a slower break or degradation is desirable, a gel or emulsion form may be used.
For the solution form, suitable exemplary solvents include propylene glycol, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and ethylene glycol monobutyl ether. In some embodiments, mixtures of solvents and water may be beneficial, for example, to keep the orthoester solubilized. The gel form of the orthoester composition may be gelled with suitable polymers and/or surfactants. For the emulsion form, suitable emulsifiers include emulsifiers like "WS-44," which is commercially available from Halliburton Energy Services, Duncan, Oklahoma.
In some embodiments of the present invention wherein an orthoester composition of the present invention is used to degrade a filter cake, if desired, chemical components that can degrade a polymeric portion of a filter cake may be used in conjunction with an orthoester composition of the present invention. Suitable examples include compatible oxidizers and/or enzymes that are capable of degrading the polymeric components of the filter cake. These oxidizers or enzymes may be in any suitable form, for example, encapsulated or otherwise contained to create a beneficial release of the oxidizer or enzyme.
In alternative embodiments of the methods of the present invention, an orthoester composition of the present invention may be coated or impregnated onto a particulate that will be placed downhole in a subterranean treatment such as fracturing or gravel packing.
When the orthoester ultimately hydrolyzes and generates the acid, the acid may degrade the acid-soluble portion of a filter cake, e.g., at least that portion substantially adjacent to the coated particulates. The generated acid also may act as a breaker for a viscosified treatment fluid, such as a fracturing or gravel pack fluid.
Any particulate suitable for use in conjunction with subterranean applications is suitable for use as particulates in these embodiments of the methods of the present invention.

For instance, natural sand, quartz sand, particulate garnet, glass, ground walnut hulls, polymeric pellets, bauxite, ceramics, or the like are all suitable. Suitable sizes range from about 4 to about 100 U.S. mesh, in certain preferred embodiments, the sizes may range from about 10 to about 70 U.S. mesh.
The orthoester compositions of the present invention may be coated onto a particulate material by any means known in the art. For instance, in one embodiment, the particulates may be coated with an orthoester composition "on-the-fly." The term "on-the-fly" is used herein to refer to an instance where one flowing stream is continuously introduced into another flowing stream so that the streams are combined and mixed while continuing to flow as a single stream as part of am ongoing treatment. Such mixing can also be described as "real-time" mixing. Batch or partial batch mixing processes may also be suitable. The coated particulate as described herein may be used as gravel particles in sand control operations, as proppant particles in fracturing operations, or as any other particulate employed in subterranean operations that may be placed substantially adjacent to a filter cake comprising an acid-soluble component.
Where the orthoester composition is a relatively solid material at ambient temperatures, it may be advantageous to mix the orthoester composition with a solvent to facilitate the coating of the orthoester composition onto the particulates. A
variety of solvents known in the art may be suitable. Some such solvents include, but are not limited to, acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or combinations thereof.
In some embodiments of the present invention, the particulates are coated with from about 0.1% to about 20% orthoester composition by weight of the particulates, more preferably from about 0.5% to about 10% orthoester composition by weight of the particulates, and most preferably from about 1 % to about 8% orthoester composition by weight of the particulate material.
In some embodiments, 100% of the particulates are coated with an orthoester composition of the present invention; in other embodiments, only a portion of the particulates may be coated. Where less than 100% of the particulates are coated with an orthoester composition of the present invention, it may be desirable to use a higher concentration of orthoester composition relative to that portion of the particulates to be coated. It is within the ability of one skilled in the art with the benefit of this disclosure to determine the amount of orthoester composition that will be necessary to sufficiently degrade the filter cake and to coat a portion of particulates with enough orthoester composition to achieve that goal.
Where the coated particulates are used in a sand control operation such as gravel packing, the gravel pack may be formed using any technique known in the art.
In one technique, gravel particles (at least a portion of which are partially coated with an orthoester composition of the present invention) are slurried into a treatment fluid and pumped into the well bore having a filter cake deposited therein substantially adjacent to the zone of the subterranean formation that has been fitted with a gravel pack screen. In alternative embodiments, it is possible to not use a screen if desired. The gravel particulates are separated from the slurry as the delivery fluid is forced into the well bore through the screen if a screen is used. The gravel particulates are not able to flow through the mesh of the screen and are left behind, forming a gravel pack. The acid generated by the orthoester composition on the particulates then degrades the acid-soluble portion of the adjacent filter cake.
When the coated particulates are used in a fracturing operation, the proppant pack formed inside a fracture from at least some of the coated particulates of the present invention may be formed using any technique known in the art. In one technique, proppant particulates comprising at least some coated particulates of the present invention are slurried into a fracturing fluid and pumped into a subterranean formation at a pressure sufficient to create or enhance a fracture in the formation. At least a portion of those particulates is then placed in a fracture and forms a proppant pack substantially adjacent to the walls of the fracture. The fracturing fluid also forms a filter cake on the surfaces of the fracture.
Once the proppant pack is substantially formed, the orthoester composition produces an acid that at least partially degrades the filter cake on the surfaces of the fracture.
Although this invention has been described in terms of some specific uses of the orthoester compositions of the present invention, the orthoester compositions may be used in other applications, for example, to degrade other acid-soluble components in a subterranean formation like the formation itself, calcium carbonate, acid-soluble components of completion equipment such as plugs, or resins (e.g., thermosetting resins).

To facilitate a better understanding of the present invention, the following examples of preferred embodiments are given. In no way should the following examples be read to limit the scope of the invention.
EXAMPLES
Six samples were prepared to illustrate the acid generated by the orthoester compositions and its reaction with calcium carbonate. These six samples are shown in Table l and were prepared by the following procedure. In a suitable flask, a quantity of water was added. Then to the flask, a quantity of "WS-44" emulsifier was added. The orthoester composition was then added. This was then stirred for 5 minutes to create an emulsion.
While continuing to stir, calcium carbonate was added. A sodium hydroxide solution was added. The mixture was heated to a temperature of 135°F. The C02 gas generation was then monitored to observe the extent of calcium carbonate dissolution with time.
Tables 2 through 7 illustrate these results for each sample.
Table 1- Composition of Samples Component Sample Sample Sample Sample Sample Sample Water (ml) 39 37 36 35 34 33 Ezrzulsifier1 1 1 1 1 1 (zrzl) tz~ietlzylortho-20 20 20 20 20 20 ormate (zzzl) calcium 2 2 2 2 2 2 caz~bouate ( ) 0.2 MNaOH 0 2 3 4 5 6 (nzl) Table 2 - Results for Sample 1 Time (hr) C02Volume (ml) 55.8 Table 3 - Results for Sample 2 Time (hr) C02Volume (ml) 3 0.4 6 1.2 8 22.6 58.5 23 94.5 Table 4 - Results for Sample 3 Time (hr) C02Volume (ml) 1 0.4 14 0.4 17 53.4 21 68.8 Table 5 - Results for Sample 4 Time (hr) C02Volume (ml) 1 1.2 2 1.2 3 1.8 1.8 6 1.8 7 1.8 8 1.8 23.5 1.8 25 53.8 26 58.5 30 71.6 Table 6 - Results for Sample 5 Time (hr) C02Volume (ml) 21 1.2 22 1.2 23 1.2 24 1.2 25 1.2 27 1.2 28 1.2 29 1.2 30 1.2 34.5 22.2 Table 7 - Results for Sample 6 Time (hr) C02Volume (ml) 1 0.4 2 0.6 3 0.8 6 1.6 7 1.6 8 1.6 24 1.6 25 1.6 26 1.6 27 1.6 29 1.6 30 1.6 31 1.6 49 85.2 50 88.2 Thus, the present invention is well adapted to carry out the objects and attain the ends and advantages mentioned as well as those, which are inherent therein. While numerous changes may be made by those skilled in the art, such changes are encompassed within the spirit and scope of this invention as defined by the appended claims.

Claims (50)

1. A method of degrading an acid-soluble portion of a filter cake comprising contacting the acid-soluble portion of the filter cake with an acid generated from an orthoester.
2. The method of claim 1 wherein the orthoester has the general formula RC(OR')(OR")(OR"'), wherein R', R", and R"' are not hydrogen, and R', R", and R"' may or may not be the same group.
3. The method of claim 2 wherein R', ", or R"' comprise a heteroatom.
4. The method of claim 3 wherein the heteroatom is nitrogen or oxygen.
5. The method of claim 1 wherein the orthoester comprises an orthoacetate, an orthoformate, or an orthopropionate.
6. The method of claim 1 wherein the orthoester comprises an orthoester of a polyfunctional alcohol.
7. The method of claim 1 wherein the orthoester comprises a poly(orthoester).
8. The method of claim 1 wherein the filter cake further comprises a polymeric portion, and wherein a component is used to at least partially degrade the polymeric portion of the filter cake.
9. The method of claim 8 wherein the component used for degrading the polymeric portion of the filter cake comprises an enzyme or an oxidizer.
10. The method of claim 1 wherein at least a portion of the orthoester is coated or impregnated onto particulates to form coated particulates or impregnated particulates.
11. The method of claim 10 wherein the particulates comprise natural sand, quartz sand, particulate garnet, glass, ground walnut hull, polymeric pellet, bauxite, or a ceramic.
12. The method of claim 10 wherein the particulates are in a size range from about 4 to about 100 U.S. mesh.
13. The method of claim 10 wherein the particulates are in a size range from about 10 to about 70 U.S. mesh.
14. The method of claim 10 wherein the orthoester is coated onto the particulates using an on-the-fly method.
15. The method of claim 10 wherein the orthoester is coated onto the particulates in a batch process.
16. The method of claim 10 wherein the coated particulates or impregnated particulates comprise a portion of a fracturing or gravel pack fluid.
17. A method of generating an acid in a subterranean formation comprising the steps of:

providing an orthoester composition that comprises an orthoester;
placing the orthoester composition in the formation; and allowing the orthoester to generate an acid in the formation.
18. The method of claim 17 wherein the orthoester has the general formula RC(OR')(OR")(OR"'), wherein R', R", and R"' are not hydrogen, and R', ", and R"' may or may not be the same group.
19. The method of claim 18 wherein R', R", or R"' comprise a heteroatom.
20. The method of claim 19 wherein the heteroatom is nitrogen, or oxygen.
21. The method of claim 17 wherein the orthoester comprises an orthoacetate, an orthoformate, or an orthopropionate.
22. The method of claim 17 wherein the orthoester comprises an orthoester of a polyfunctional alcohol.
23. The method of claim 17 wherein the orthoester comprises from about 1% to about 100% of the orthoester composition.
24. The method of claim 17 wherein the orthoester composition comprises an inhibitor.
25. The method of claim 24 wherein the inhibitor comprises sodium hydroxide, potassium hydroxide, an amine, sodium carbonate or a combination thereof.
26. The method of claim 17 wherein at least a portion of the orthoester composition is coated or impregnated onto particulates to form coated particulates or impregnated particulates.
27. The method of claim 26 wherein the coated particulates or impregnated particulates comprise a portion of a fracturing or gravel pack fluid.
28. The method of claim 26 wherein less than 100% of the particulates are coated or impregnated with the orthoester composition.
29. The method of claim 17 wherein the orthoester composition is in a solution form, gel form, or an emulsion form.
30. The method of claim 29 wherein the solution form comprises propylene glycol, propylene glycol monomethyl ether, dipropylene glycol monomethyl ether, ethylene glycol monobutyl ether, or water.
31. The method of claim 29 wherein the gel form comprises a polymer or a surfactants.
32. The method of claim 29 wherein the emulsion form comprises an emulsifier.
33. A method of degrading an acid soluble component in a subterranean formation comprising the steps of:

providing an orthoester composition that comprises an orthoester;
placing the orthoester composition in the formation;

allowing the orthoester to generate a generated acid; and allowing the generated acid to at least partially degrade the acid soluble component.
34. The method of claim 33 wherein the acid soluble component is a portion of a filter cake.
35. The method of claim 33 wherein the orthoester has the general formula RC(OR')(OR")(OR"'), wherein R', R", and R"' are not hydrogen, and R', R', and R"' may or may not be the same group.
36. The method of claim 35 wherein R', R", or R"' comprise a heteroatom.
37. The method of claim 36 wherein the heteroatom is nitrogen or oxygen.
38. The method of claim 33 wherein the orthoester comprises an orthoester of a polyfunctional alcohol.
39. The method of claim 33 wherein the orthoester composition comprises an inhibitor for interacting with the acid so as to delay the degradation of the acid soluble component by the acid.
40. The method of claim 39 wherein the inhibitor comprises sodium hydroxide, potassium hydroxide, an amine, sodium carbonate, or a combination thereof.
41. The method of claim 33 wherein at least a portion of the orthoester composition is coated or impregnated onto particulates to form coated particulates or impregnated particulates.
42. The method of claims 33 wherein the orthoester composition is in a solution form, gel form, or an emulsion form.
43. The method of claim 33 wherein the acid soluble component comprises a portion of the subterranean formation, calcium carbonate, a thermosetting resin, or a portion of a piece of completion equipment.
44. A method of degrading a filter cake in a subterranean formation comprising the steps of:

providing particulates coated or impregnated with an orthoester composition that comprises an orthoester;

placing the particulates into the subterranean formation so that they are substantially adjacent to the filter cake;

allowing the orthoester to generate a generated acid; and allowing the generated acid to degrade at least a portion of an acid-soluble portion of the filter cake.
45. The method of claim 44 wherein the orthoester has the general formula RC(OR')(OR")(OR"'), wherein R', R", and R"' are not hydrogen, and R', R", and R"' may or may not be the same group.
46. The method of claim 45 wherein R', R", or R"' comprise a heteroatom.
47. The method of claim 44 wherein the orthoester comprises an orthoester of a polyfunctional alcohol.
48. The method of claim 44 wherein the orthoester composition comprises an inhibitor for delaying the degradation of the acid soluble portion of the filter cake by the generated acid.
49. The method of claim 48 wherein the inhibitor comprises sodium hydroxide, potassium hydroxide, an amine, sodium carbonate, or a combination thereof.
50. The method of claim 44 wherein the particulates comprise natural sand, quartz sand, particulate garnet, glass, ground walnut hull, polymeric pellet, bauxite, or a ceramic.
CA002552049A 2004-01-07 2004-12-17 Orthoester compositions and methods of use in subterranean applications Expired - Fee Related CA2552049C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002683210A CA2683210A1 (en) 2004-01-07 2004-12-17 Orthoester compositions and methods of use in subterranean applications

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/752,752 US7140438B2 (en) 2003-08-14 2004-01-07 Orthoester compositions and methods of use in subterranean applications
US10/752,752 2004-01-07
PCT/GB2004/005309 WO2005066451A1 (en) 2004-01-07 2004-12-17 Orthoester compositions and methods of use in subterranean applications

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002683210A Division CA2683210A1 (en) 2004-01-07 2004-12-17 Orthoester compositions and methods of use in subterranean applications

Publications (2)

Publication Number Publication Date
CA2552049A1 CA2552049A1 (en) 2005-07-21
CA2552049C true CA2552049C (en) 2010-02-02

Family

ID=34749353

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002683210A Abandoned CA2683210A1 (en) 2004-01-07 2004-12-17 Orthoester compositions and methods of use in subterranean applications
CA002552049A Expired - Fee Related CA2552049C (en) 2004-01-07 2004-12-17 Orthoester compositions and methods of use in subterranean applications

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA002683210A Abandoned CA2683210A1 (en) 2004-01-07 2004-12-17 Orthoester compositions and methods of use in subterranean applications

Country Status (4)

Country Link
US (1) US7140438B2 (en)
CA (2) CA2683210A1 (en)
RU (1) RU2371572C2 (en)
WO (1) WO2005066451A1 (en)

Families Citing this family (92)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7168489B2 (en) * 2001-06-11 2007-01-30 Halliburton Energy Services, Inc. Orthoester compositions and methods for reducing the viscosified treatment fluids
US20050130848A1 (en) * 2003-06-27 2005-06-16 Halliburton Energy Services, Inc. Compositions and methods for improving fracture conductivity in a subterranean well
US7228904B2 (en) * 2003-06-27 2007-06-12 Halliburton Energy Services, Inc. Compositions and methods for improving fracture conductivity in a subterranean well
US7178596B2 (en) * 2003-06-27 2007-02-20 Halliburton Energy Services, Inc. Methods for improving proppant pack permeability and fracture conductivity in a subterranean well
US8541051B2 (en) 2003-08-14 2013-09-24 Halliburton Energy Services, Inc. On-the fly coating of acid-releasing degradable material onto a particulate
US7497278B2 (en) * 2003-08-14 2009-03-03 Halliburton Energy Services, Inc. Methods of degrading filter cakes in a subterranean formation
US7833944B2 (en) 2003-09-17 2010-11-16 Halliburton Energy Services, Inc. Methods and compositions using crosslinked aliphatic polyesters in well bore applications
US7674753B2 (en) 2003-09-17 2010-03-09 Halliburton Energy Services, Inc. Treatment fluids and methods of forming degradable filter cakes comprising aliphatic polyester and their use in subterranean formations
US7829507B2 (en) * 2003-09-17 2010-11-09 Halliburton Energy Services Inc. Subterranean treatment fluids comprising a degradable bridging agent and methods of treating subterranean formations
US7195068B2 (en) * 2003-12-15 2007-03-27 Halliburton Energy Services, Inc. Filter cake degradation compositions and methods of use in subterranean operations
US7096947B2 (en) * 2004-01-27 2006-08-29 Halliburton Energy Services, Inc. Fluid loss control additives for use in fracturing subterranean formations
US7156174B2 (en) * 2004-01-30 2007-01-02 Halliburton Energy Services, Inc. Contained micro-particles for use in well bore operations
US7036586B2 (en) * 2004-01-30 2006-05-02 Halliburton Energy Services, Inc. Methods of cementing in subterranean formations using crack resistant cement compositions
US7204312B2 (en) * 2004-01-30 2007-04-17 Halliburton Energy Services, Inc. Compositions and methods for the delivery of chemical components in subterranean well bores
US7172022B2 (en) * 2004-03-17 2007-02-06 Halliburton Energy Services, Inc. Cement compositions containing degradable materials and methods of cementing in subterranean formations
GB2412389A (en) * 2004-03-27 2005-09-28 Cleansorb Ltd Process for treating underground formations
US20070078063A1 (en) * 2004-04-26 2007-04-05 Halliburton Energy Services, Inc. Subterranean treatment fluids and methods of treating subterranean formations
US7475728B2 (en) * 2004-07-23 2009-01-13 Halliburton Energy Services, Inc. Treatment fluids and methods of use in subterranean formations
US20060032633A1 (en) * 2004-08-10 2006-02-16 Nguyen Philip D Methods and compositions for carrier fluids comprising water-absorbent fibers
US20060046938A1 (en) * 2004-09-02 2006-03-02 Harris Philip C Methods and compositions for delinking crosslinked fluids
US7299869B2 (en) * 2004-09-03 2007-11-27 Halliburton Energy Services, Inc. Carbon foam particulates and methods of using carbon foam particulates in subterranean applications
US7413017B2 (en) * 2004-09-24 2008-08-19 Halliburton Energy Services, Inc. Methods and compositions for inducing tip screenouts in frac-packing operations
US7553800B2 (en) * 2004-11-17 2009-06-30 Halliburton Energy Services, Inc. In-situ filter cake degradation compositions and methods of use in subterranean formations
US7648946B2 (en) 2004-11-17 2010-01-19 Halliburton Energy Services, Inc. Methods of degrading filter cakes in subterranean formations
US7491682B2 (en) * 2004-12-15 2009-02-17 Bj Services Company Method of inhibiting or controlling formation of inorganic scales
US20060169182A1 (en) 2005-01-28 2006-08-03 Halliburton Energy Services, Inc. Methods and compositions relating to the hydrolysis of water-hydrolysable materials
US8030249B2 (en) * 2005-01-28 2011-10-04 Halliburton Energy Services, Inc. Methods and compositions relating to the hydrolysis of water-hydrolysable materials
US7267170B2 (en) * 2005-01-31 2007-09-11 Halliburton Energy Services, Inc. Self-degrading fibers and associated methods of use and manufacture
US20080009423A1 (en) 2005-01-31 2008-01-10 Halliburton Energy Services, Inc. Self-degrading fibers and associated methods of use and manufacture
US7353876B2 (en) * 2005-02-01 2008-04-08 Halliburton Energy Services, Inc. Self-degrading cement compositions and methods of using self-degrading cement compositions in subterranean formations
US20060169448A1 (en) * 2005-02-01 2006-08-03 Halliburton Energy Services, Inc. Self-degrading cement compositions and methods of using self-degrading cement compositions in subterranean formations
US20060172894A1 (en) * 2005-02-02 2006-08-03 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US8598092B2 (en) 2005-02-02 2013-12-03 Halliburton Energy Services, Inc. Methods of preparing degradable materials and methods of use in subterranean formations
US20060172895A1 (en) * 2005-02-02 2006-08-03 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US20070298977A1 (en) * 2005-02-02 2007-12-27 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US20060169450A1 (en) * 2005-02-02 2006-08-03 Halliburton Energy Services, Inc. Degradable particulate generation and associated methods
US7506689B2 (en) * 2005-02-22 2009-03-24 Halliburton Energy Services, Inc. Fracturing fluids comprising degradable diverting agents and methods of use in subterranean formations
US7216705B2 (en) * 2005-02-22 2007-05-15 Halliburton Energy Services, Inc. Methods of placing treatment chemicals
US7677315B2 (en) * 2005-05-12 2010-03-16 Halliburton Energy Services, Inc. Degradable surfactants and methods for use
US7662753B2 (en) 2005-05-12 2010-02-16 Halliburton Energy Services, Inc. Degradable surfactants and methods for use
US20060276345A1 (en) * 2005-06-07 2006-12-07 Halliburton Energy Servicers, Inc. Methods controlling the degradation rate of hydrolytically degradable materials
US7299877B2 (en) * 2005-08-09 2007-11-27 Halliburton Energy Services, Inc. Methods for effecting controlled break in pH dependent foamed fracturing fluid
US20070049501A1 (en) * 2005-09-01 2007-03-01 Halliburton Energy Services, Inc. Fluid-loss control pills comprising breakers that comprise orthoesters and/or poly(orthoesters) and methods of use
US7713916B2 (en) 2005-09-22 2010-05-11 Halliburton Energy Services, Inc. Orthoester-based surfactants and associated methods
US7461697B2 (en) * 2005-11-21 2008-12-09 Halliburton Energy Services, Inc. Methods of modifying particulate surfaces to affect acidic sites thereon
US7598209B2 (en) * 2006-01-26 2009-10-06 Bj Services Company Porous composites containing hydrocarbon-soluble well treatment agents and methods for using the same
US7608566B2 (en) * 2006-03-30 2009-10-27 Halliburton Energy Services, Inc. Degradable particulates as friction reducers for the flow of solid particulates and associated methods of use
US20080026959A1 (en) * 2006-07-25 2008-01-31 Halliburton Energy Services, Inc. Degradable particulates and associated methods
US8329621B2 (en) 2006-07-25 2012-12-11 Halliburton Energy Services, Inc. Degradable particulates and associated methods
US7921912B2 (en) * 2006-08-10 2011-04-12 Halliburton Energy Services, Inc. Non-acid acidizing methods and compositions
US7926568B2 (en) * 2006-08-10 2011-04-19 Halliburton Energy Services, Inc. Non-acid acidizing methods and compositions
US7678742B2 (en) * 2006-09-20 2010-03-16 Halliburton Energy Services, Inc. Drill-in fluids and associated methods
US7678743B2 (en) * 2006-09-20 2010-03-16 Halliburton Energy Services, Inc. Drill-in fluids and associated methods
US7687438B2 (en) * 2006-09-20 2010-03-30 Halliburton Energy Services, Inc. Drill-in fluids and associated methods
US8012914B2 (en) * 2006-10-27 2011-09-06 Halliburton Energy Services, Inc. Ortho ester breakers for viscoelastic surfactant gels and associated methods
US8008236B2 (en) * 2006-10-27 2011-08-30 Halliburton Energy Services, Inc. Ortho ester breakers for viscoelastic surfactant gels and associated methods
US7686080B2 (en) 2006-11-09 2010-03-30 Halliburton Energy Services, Inc. Acid-generating fluid loss control additives and associated methods
US8242060B2 (en) * 2006-12-21 2012-08-14 Dorf Ketal Specialty Catalysts, LLC Stable solutions of zirconium hydroxyalkylethylene diamine complex and use in oil field applications
US8220548B2 (en) 2007-01-12 2012-07-17 Halliburton Energy Services Inc. Surfactant wash treatment fluids and associated methods
US8236739B2 (en) * 2007-03-30 2012-08-07 Dork Ketal Speciality Catalysts, LLC Zirconium-based cross-linker compositions and their use in high pH oil field applications
US8413721B2 (en) * 2007-05-22 2013-04-09 Halliburton Energy Services, Inc. Viscosified fluids for remediating subterranean damage
US8727001B2 (en) * 2007-09-25 2014-05-20 Halliburton Energy Services, Inc. Methods and compositions relating to minimizing particulate migration over long intervals
US7950455B2 (en) * 2008-01-14 2011-05-31 Baker Hughes Incorporated Non-spherical well treating particulates and methods of using the same
US8153564B2 (en) * 2008-03-07 2012-04-10 Dorf Ketal Speciality Catalysts, Llc Zirconium-based cross-linking composition for use with high pH polymer solutions
US8006760B2 (en) 2008-04-10 2011-08-30 Halliburton Energy Services, Inc. Clean fluid systems for partial monolayer fracturing
US7814980B2 (en) * 2008-04-10 2010-10-19 Halliburton Energy Services, Inc. Micro-crosslinked gels and associated methods
US7906464B2 (en) * 2008-05-13 2011-03-15 Halliburton Energy Services, Inc. Compositions and methods for the removal of oil-based filtercakes
US7833943B2 (en) 2008-09-26 2010-11-16 Halliburton Energy Services Inc. Microemulsifiers and methods of making and using same
EP2352898A4 (en) * 2008-11-07 2012-11-28 Mi Llc Non-aqueous breaker fluids and methods of use thereof
US7998910B2 (en) 2009-02-24 2011-08-16 Halliburton Energy Services, Inc. Treatment fluids comprising relative permeability modifiers and methods of use
US8082992B2 (en) 2009-07-13 2011-12-27 Halliburton Energy Services, Inc. Methods of fluid-controlled geometry stimulation
US10822536B2 (en) 2010-07-19 2020-11-03 Baker Hughes, A Ge Company, Llc Method of using a screen containing a composite for release of well treatment agent into a well
US9976070B2 (en) 2010-07-19 2018-05-22 Baker Hughes, A Ge Company, Llc Method of using shaped compressed pellets in well treatment operations
US9010430B2 (en) 2010-07-19 2015-04-21 Baker Hughes Incorporated Method of using shaped compressed pellets in treating a well
US9029300B2 (en) 2011-04-26 2015-05-12 Baker Hughes Incorporated Composites for controlled release of well treatment agents
US8646528B2 (en) * 2010-12-16 2014-02-11 Halliburton Energy Services, Inc. Compositions and methods relating to establishing circulation in stand-alone-screens without using washpipes
US8664168B2 (en) 2011-03-30 2014-03-04 Baker Hughes Incorporated Method of using composites in the treatment of wells
EP2760966A1 (en) * 2011-09-29 2014-08-06 Saudi Arabian Oil Company In-situ generated buffer system
US20150175871A1 (en) * 2012-07-09 2015-06-25 M-I, L.L.C. Breaker fluid
US8739871B2 (en) 2012-09-18 2014-06-03 Halliburton Energy Services, Inc. Thermally-activated, high temperature particulate suspending agents and methods relating thereto
EP2981636B1 (en) 2013-04-02 2021-05-26 Alltemp Products Company Limited Improved neutralization and removal of acids in hvac systems through the use of drying agents
EP3186331B1 (en) 2014-07-23 2022-05-04 Baker Hughes Holdings LLC Composite comprising well treatment agent and/or a tracer adhered onto a calcined substrate of a metal oxide coated core and a method of using the same
US9656237B2 (en) 2014-07-31 2017-05-23 Baker Hughes Incorporated Method of scavenging hydrogen sulfide and mercaptans using well treatment composites
US10641083B2 (en) 2016-06-02 2020-05-05 Baker Hughes, A Ge Company, Llc Method of monitoring fluid flow from a reservoir using well treatment agents
US10413966B2 (en) 2016-06-20 2019-09-17 Baker Hughes, A Ge Company, Llc Nanoparticles having magnetic core encapsulated by carbon shell and composites of the same
CN106522885A (en) * 2016-12-21 2017-03-22 崔虹雯 Wax removing method for oil well in oil extraction process
GB2572904B (en) 2017-03-03 2022-06-22 Halliburton Energy Services Inc Downhole fluids containing cyclic orthoesters and brine and methods for using the same
US11254861B2 (en) 2017-07-13 2022-02-22 Baker Hughes Holdings Llc Delivery system for oil-soluble well treatment agents and methods of using the same
EP3704206A1 (en) 2017-11-03 2020-09-09 Baker Hughes Holdings Llc Treatment methods using aqueous fluids containing oil-soluble treatment agents
US11299668B2 (en) 2017-11-09 2022-04-12 Halliburton Energy Services, Inc. Methods and compositions for acidizing and stabilizing formation of fracture faces in the same treatment
US10961444B1 (en) 2019-11-01 2021-03-30 Baker Hughes Oilfield Operations Llc Method of using coated composites containing delayed release agent in a well treatment operation
NO20230538A1 (en) 2020-10-28 2023-05-08 Cleansorb Ltd Composition and method of reducing deposition of formate in underground formations

Family Cites Families (133)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2238671A (en) 1940-02-09 1941-04-15 Du Pont Method of treating wells
US2703316A (en) 1951-06-05 1955-03-01 Du Pont Polymers of high melting lactide
CH336370A (en) * 1955-06-27 1959-02-28 Hoffmann La Roche Process for the production of carotenoids
US3173484A (en) 1958-09-02 1965-03-16 Gulf Research Development Co Fracturing process employing a heterogeneous propping agent
US3272650A (en) 1963-02-21 1966-09-13 Union Carbide Corp Process for cleaning conduits
US3195635A (en) 1963-05-23 1965-07-20 Pan American Petroleum Corp Spacers for fracture props
US3302719A (en) 1965-01-25 1967-02-07 Union Oil Co Method for treating subterranean formations
US3366178A (en) 1965-09-10 1968-01-30 Halliburton Co Method of fracturing and propping a subterranean formation
US3455390A (en) 1965-12-03 1969-07-15 Union Oil Co Low fluid loss well treating composition and method
US3364995A (en) 1966-02-14 1968-01-23 Dow Chemical Co Hydraulic fracturing fluid-bearing earth formations
US3658832A (en) * 1969-12-08 1972-04-25 American Cyanamid Co Novel antimicrobial nitroimidazolyl-1 2 4-oxadiazoles
US3784585A (en) 1971-10-21 1974-01-08 American Cyanamid Co Water-degradable resins containing recurring,contiguous,polymerized glycolide units and process for preparing same
US3819525A (en) 1972-08-21 1974-06-25 Avon Prod Inc Cosmetic cleansing preparation
US3828854A (en) 1973-04-16 1974-08-13 Shell Oil Co Dissolving siliceous materials with self-acidifying liquid
US3912692A (en) 1973-05-03 1975-10-14 American Cyanamid Co Process for polymerizing a substantially pure glycolide composition
US3968840A (en) 1973-05-25 1976-07-13 Texaco Inc. Controlled rate acidization process
US3948672A (en) 1973-12-28 1976-04-06 Texaco Inc. Permeable cement composition and method
US3955993A (en) 1973-12-28 1976-05-11 Texaco Inc. Method and composition for stabilizing incompetent oil-containing formations
US3868998A (en) 1974-05-15 1975-03-04 Shell Oil Co Self-acidifying treating fluid positioning process
US3960736A (en) 1974-06-03 1976-06-01 The Dow Chemical Company Self-breaking viscous aqueous solutions and the use thereof in fracturing subterranean formations
US4172066A (en) 1974-06-21 1979-10-23 The Dow Chemical Company Cross-linked, water-swellable polymer microgels
US3998744A (en) 1975-04-16 1976-12-21 Standard Oil Company Oil fracturing spacing agents
US3998272A (en) 1975-04-21 1976-12-21 Union Oil Company Of California Method of acidizing wells
CA1045027A (en) 1975-09-26 1978-12-26 Walter A. Hedden Hydraulic fracturing method using sintered bauxite propping agent
US4169798A (en) 1976-11-26 1979-10-02 Celanese Corporation Well-treating compositions
US4261421A (en) 1980-03-24 1981-04-14 Union Oil Company Of California Method for selectively acidizing the less permeable zones of a high temperature subterranean formation
US4460052A (en) 1981-08-10 1984-07-17 Judith Gockel Prevention of lost circulation of drilling muds
US4526695A (en) 1981-08-10 1985-07-02 Exxon Production Research Co. Composition for reducing the permeability of subterranean formations
US4498995A (en) 1981-08-10 1985-02-12 Judith Gockel Lost circulation drilling fluid
US4716964A (en) 1981-08-10 1988-01-05 Exxon Production Research Company Use of degradable ball sealers to seal casing perforations in well treatment fluid diversion
US4387769A (en) 1981-08-10 1983-06-14 Exxon Production Research Co. Method for reducing the permeability of subterranean formations
US4470915A (en) 1982-09-27 1984-09-11 Halliburton Company Method and compositions for fracturing subterranean formations
US4715967A (en) 1985-12-27 1987-12-29 E. I. Du Pont De Nemours And Company Composition and method for temporarily reducing permeability of subterranean formations
US4694905A (en) 1986-05-23 1987-09-22 Acme Resin Corporation Precured coated particulate material
US4785884A (en) 1986-05-23 1988-11-22 Acme Resin Corporation Consolidation of partially cured resin coated particulate material
US4693808A (en) 1986-06-16 1987-09-15 Shell Oil Company Downflow fluidized catalytic cranking reactor process and apparatus with quick catalyst separation means in the bottom thereof
MX168601B (en) 1986-10-01 1993-06-01 Air Prod & Chem PROCEDURE FOR THE PREPARATION OF A HIGH MOLECULAR WEIGHT VINYLAMINE HOMOPOLYMER
US4817721A (en) 1987-12-14 1989-04-04 Conoco Inc. Reducing the permeability of a rock formation
US4809783A (en) 1988-01-14 1989-03-07 Halliburton Services Method of dissolving organic filter cake
US4957165A (en) 1988-02-16 1990-09-18 Conoco Inc. Well treatment process
US4848467A (en) 1988-02-16 1989-07-18 Conoco Inc. Formation fracturing process
US4886354A (en) 1988-05-06 1989-12-12 Conoco Inc. Method and apparatus for measuring crystal formation
US5216050A (en) 1988-08-08 1993-06-01 Biopak Technology, Ltd. Blends of polyactic acid
US4986353A (en) 1988-09-14 1991-01-22 Conoco Inc. Placement process for oil field chemicals
US4986354A (en) 1988-09-14 1991-01-22 Conoco Inc. Composition and placement process for oil field chemicals
US4961466A (en) 1989-01-23 1990-10-09 Halliburton Company Method for effecting controlled break in polysaccharide gels
US4986355A (en) 1989-05-18 1991-01-22 Conoco Inc. Process for the preparation of fluid loss additive and gel breaker
US5464060A (en) 1989-12-27 1995-11-07 Shell Oil Company Universal fluids for drilling and cementing wells
US5082056A (en) 1990-10-16 1992-01-21 Marathon Oil Company In situ reversible crosslinked polymer gel used in hydrocarbon recovery applications
US5247059A (en) 1992-01-24 1993-09-21 Cargill, Incorporated Continuous process for the manufacture of a purified lactide from esters of lactic acid
US5211234A (en) * 1992-01-30 1993-05-18 Halliburton Company Horizontal well completion methods
US5249628A (en) 1992-09-29 1993-10-05 Halliburton Company Horizontal well completions
US5325923A (en) 1992-09-29 1994-07-05 Halliburton Company Well completions with expandable casing portions
US5396957A (en) 1992-09-29 1995-03-14 Halliburton Company Well completions with expandable casing portions
US5338822A (en) 1992-10-02 1994-08-16 Cargill, Incorporated Melt-stable lactide polymer composition and process for manufacture thereof
US5295542A (en) 1992-10-05 1994-03-22 Halliburton Company Well gravel packing methods
US5363916A (en) 1992-12-21 1994-11-15 Halliburton Company Method of gravel packing a well
US5316587A (en) 1993-01-21 1994-05-31 Church & Dwight Co., Inc. Water soluble blast media containing surfactant
JPH06225848A (en) 1993-02-01 1994-08-16 Tootaru Service:Kk Cleaning method for outer wall surface of building
US5330005A (en) 1993-04-05 1994-07-19 Dowell Schlumberger Incorporated Control of particulate flowback in subterranean wells
CA2497728C (en) 1993-04-05 2008-02-19 Roger J. Card Control of particulate flowback in subterranean wells
US5360068A (en) 1993-04-19 1994-11-01 Mobil Oil Corporation Formation fracturing
US5373901A (en) 1993-07-27 1994-12-20 Halliburton Company Encapsulated breakers and method for use in treating subterranean formations
US5359026A (en) 1993-07-30 1994-10-25 Cargill, Incorporated Poly(lactide) copolymer and process for manufacture thereof
US5386874A (en) 1993-11-08 1995-02-07 Halliburton Company Perphosphate viscosity breakers in well fracture fluids
US5402846A (en) 1993-11-15 1995-04-04 Mobil Oil Corporation Unique method of hydraulic fracturing
DK0656459T3 (en) 1993-11-27 2001-06-18 Aea Technology Plc Process for treating oil wells
US5607905A (en) 1994-03-15 1997-03-04 Texas United Chemical Company, Llc. Well drilling and servicing fluids which deposit an easily removable filter cake
US5460226A (en) 1994-05-18 1995-10-24 Shell Oil Company Formation fracturing
US5504235A (en) * 1994-06-15 1996-04-02 Kanegafuchi Chemical Industry Co., Ltd. Method for decomposing polysiloxane
US5499678A (en) 1994-08-02 1996-03-19 Halliburton Company Coplanar angular jetting head for well perforating
US5591700A (en) 1994-12-22 1997-01-07 Halliburton Company Fracturing fluid with encapsulated breaker
US5604186A (en) 1995-02-15 1997-02-18 Halliburton Company Encapsulated enzyme breaker and method for use in treating subterranean formations
GB9503949D0 (en) 1995-02-28 1995-04-19 Atomic Energy Authority Uk Oil well treatment
US5833000A (en) 1995-03-29 1998-11-10 Halliburton Energy Services, Inc. Control of particulate flowback in subterranean wells
US6209643B1 (en) 1995-03-29 2001-04-03 Halliburton Energy Services, Inc. Method of controlling particulate flowback in subterranean wells and introducing treatment chemicals
US5775425A (en) 1995-03-29 1998-07-07 Halliburton Energy Services, Inc. Control of fine particulate flowback in subterranean wells
US6047772A (en) 1995-03-29 2000-04-11 Halliburton Energy Services, Inc. Control of particulate flowback in subterranean wells
US5497830A (en) 1995-04-06 1996-03-12 Bj Services Company Coated breaker for crosslinked acid
US5670473A (en) 1995-06-06 1997-09-23 Sunburst Chemicals, Inc. Solid cleaning compositions based on hydrated salts
US6028113A (en) 1995-09-27 2000-02-22 Sunburst Chemicals, Inc. Solid sanitizers and cleaner disinfectants
US5849401A (en) 1995-09-28 1998-12-15 Cargill, Incorporated Compostable multilayer structures, methods for manufacture, and articles prepared therefrom
US5985312A (en) 1996-01-26 1999-11-16 Brown University Research Foundation Methods and compositions for enhancing the bioadhesive properties of polymers
US5698322A (en) 1996-12-02 1997-12-16 Kimberly-Clark Worldwide, Inc. Multicomponent fiber
US5765642A (en) 1996-12-23 1998-06-16 Halliburton Energy Services, Inc. Subterranean formation fracturing methods
US5791415A (en) 1997-03-13 1998-08-11 Halliburton Energy Services, Inc. Stimulating wells in unconsolidated formations
US6169058B1 (en) 1997-06-05 2001-01-02 Bj Services Company Compositions and methods for hydraulic fracturing
US5924488A (en) 1997-06-11 1999-07-20 Halliburton Energy Services, Inc. Methods of preventing well fracture proppant flow-back
US5908073A (en) 1997-06-26 1999-06-01 Halliburton Energy Services, Inc. Preventing well fracture proppant flow-back
US6004400A (en) 1997-07-09 1999-12-21 Phillip W. Bishop Carbon dioxide cleaning process
US5909774A (en) * 1997-09-22 1999-06-08 Halliburton Energy Services, Inc. Synthetic oil-water emulsion drill-in fluid cleanup methods
US6135987A (en) 1997-12-22 2000-10-24 Kimberly-Clark Worldwide, Inc. Synthetic fiber
EP0926310A1 (en) * 1997-12-24 1999-06-30 Shell Internationale Researchmaatschappij B.V. Apparatus and method for injecting treatment fluids into an underground formation
US6162766A (en) 1998-05-29 2000-12-19 3M Innovative Properties Company Encapsulated breakers, compositions and methods of use
US6024170A (en) 1998-06-03 2000-02-15 Halliburton Energy Services, Inc. Methods of treating subterranean formation using borate cross-linking compositions
US6686328B1 (en) * 1998-07-17 2004-02-03 The Procter & Gamble Company Detergent tablet
US6114410A (en) 1998-07-17 2000-09-05 Technisand, Inc. Proppant containing bondable particles and removable particles
GB2340147A (en) * 1998-07-30 2000-02-16 Sofitech Nv Wellbore fluid
US6242390B1 (en) * 1998-07-31 2001-06-05 Schlumberger Technology Corporation Cleanup additive
US6131661A (en) 1998-08-03 2000-10-17 Tetra Technologies Inc. Method for removing filtercake
US6189615B1 (en) 1998-12-15 2001-02-20 Marathon Oil Company Application of a stabilized polymer gel to an alkaline treatment region for improved hydrocarbon recovery
US6140277A (en) * 1998-12-31 2000-10-31 Schlumberger Technology Corporation Fluids and techniques for hydrocarbon well completion
GB9906484D0 (en) * 1999-03-19 1999-05-12 Cleansorb Ltd Method for treatment of underground reservoirs
US6380138B1 (en) * 1999-04-06 2002-04-30 Fairmount Minerals Ltd. Injection molded degradable casing perforation ball sealers fluid loss additive and method of use
US6209646B1 (en) 1999-04-21 2001-04-03 Halliburton Energy Services, Inc. Controlling the release of chemical additives in well treating fluids
US6387986B1 (en) * 1999-06-24 2002-05-14 Ahmad Moradi-Araghi Compositions and processes for oil field applications
GB9915354D0 (en) * 1999-07-02 1999-09-01 Cleansorb Ltd Method for treatment of underground reservoirs
CA2318703A1 (en) * 1999-09-16 2001-03-16 Bj Services Company Compositions and methods for cementing using elastic particles
US6214773B1 (en) * 1999-09-29 2001-04-10 Halliburton Energy Services, Inc. High temperature, low residue well treating fluids and methods
US6357527B1 (en) * 2000-05-05 2002-03-19 Halliburton Energy Services, Inc. Encapsulated breakers and method for use in treating subterranean formations
US6444316B1 (en) * 2000-05-05 2002-09-03 Halliburton Energy Services, Inc. Encapsulated chemicals for use in controlled time release applications and methods
US6394185B1 (en) * 2000-07-27 2002-05-28 Vernon George Constien Product and process for coating wellbore screens
US6390195B1 (en) * 2000-07-28 2002-05-21 Halliburton Energy Service,S Inc. Methods and compositions for forming permeable cement sand screens in well bores
US6202751B1 (en) * 2000-07-28 2001-03-20 Halliburton Energy Sevices, Inc. Methods and compositions for forming permeable cement sand screens in well bores
US6494263B2 (en) * 2000-08-01 2002-12-17 Halliburton Energy Services, Inc. Well drilling and servicing fluids and methods of removing filter cake deposited thereby
US6422314B1 (en) * 2000-08-01 2002-07-23 Halliburton Energy Services, Inc. Well drilling and servicing fluids and methods of removing filter cake deposited thereby
CA2432160C (en) * 2001-01-09 2010-04-13 Bj Services Company Well treatment fluid compositions and methods for their use
US7080688B2 (en) * 2003-08-14 2006-07-25 Halliburton Energy Services, Inc. Compositions and methods for degrading filter cake
WO2003027431A2 (en) * 2001-09-26 2003-04-03 Cooke Claude E Jr Method and materials for hydraulic fracturing of wells
US6861394B2 (en) * 2001-12-19 2005-03-01 M-I L.L.C. Internal breaker
GB0216277D0 (en) * 2002-07-12 2002-08-21 Cleansorb Ltd Process for treatment of underground reservoirs
US7049272B2 (en) * 2002-07-16 2006-05-23 Santrol, Inc. Downhole chemical delivery system for oil and gas wells
US7066260B2 (en) * 2002-08-26 2006-06-27 Schlumberger Technology Corporation Dissolving filter cake
US6886635B2 (en) * 2002-08-28 2005-05-03 Tetra Technologies, Inc. Filter cake removal fluid and method
US6817414B2 (en) * 2002-09-20 2004-11-16 M-I Llc Acid coated sand for gravel pack and filter cake clean-up
US6896058B2 (en) * 2002-10-22 2005-05-24 Halliburton Energy Services, Inc. Methods of introducing treating fluids into subterranean producing zones
ATE350428T1 (en) * 2002-10-28 2007-01-15 Schlumberger Technology Bv SELF-RENDING FILTER CAKE
US6681856B1 (en) * 2003-05-16 2004-01-27 Halliburton Energy Services, Inc. Methods of cementing in subterranean zones penetrated by well bores using biodegradable dispersants
US7066258B2 (en) * 2003-07-08 2006-06-27 Halliburton Energy Services, Inc. Reduced-density proppants and methods of using reduced-density proppants to enhance their transport in well bores and fractures
US20050028976A1 (en) * 2003-08-05 2005-02-10 Nguyen Philip D. Compositions and methods for controlling the release of chemicals placed on particulates
US8541051B2 (en) * 2003-08-14 2013-09-24 Halliburton Energy Services, Inc. On-the fly coating of acid-releasing degradable material onto a particulate
US7000701B2 (en) * 2003-11-18 2006-02-21 Halliburton Energy Services, Inc. Compositions and methods for weighting a breaker coating for uniform distribution in a particulate pack
US7195068B2 (en) * 2003-12-15 2007-03-27 Halliburton Energy Services, Inc. Filter cake degradation compositions and methods of use in subterranean operations

Also Published As

Publication number Publication date
WO2005066451A1 (en) 2005-07-21
CA2683210A1 (en) 2005-07-21
RU2006128591A (en) 2008-02-20
CA2552049A1 (en) 2005-07-21
US7140438B2 (en) 2006-11-28
US20050034868A1 (en) 2005-02-17
RU2371572C2 (en) 2009-10-27

Similar Documents

Publication Publication Date Title
CA2552049C (en) Orthoester compositions and methods of use in subterranean applications
CA2557148C (en) Orthoester compositions and methods for reducing the viscosity of viscosified treatment fluids
US7497278B2 (en) Methods of degrading filter cakes in a subterranean formation
CA2694151C (en) Treatment fluids comprising clarified xanthan and associated methods
RU2443856C2 (en) Compositions for slow increase in adhesive ability, and relative methods involving particle migration
EP1766185B1 (en) System stabilizers and performance enhancers for aqueous fluids gelled with viscoelastic surfactants
AU2007299784B2 (en) Nano-sized particles for stabilizing viscoelastic surfactant fluids
CA2576157C (en) Stabilizing crosslinked polymer guars and modified guar derivatives
RU2422487C2 (en) Plurality of proppant particles coated with delayed action tackifying composition, and treatment composition based on said particles
US7080688B2 (en) Compositions and methods for degrading filter cake
US8413721B2 (en) Viscosified fluids for remediating subterranean damage
US7662756B2 (en) Methods for effecting controlled break in pH dependent foamed fracturing fluid
US20110214868A1 (en) Clean Viscosified Treatment Fluids and Associated Methods
US20110214859A1 (en) Clean Viscosified Treatment Fluids and Associated Methods
MXPA06007868A (en) Orthoester compositions and methods of use in subterranean applications

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20161219