CN104251136B - A kind of determination method that coal bed gas well coal is not spent - Google Patents
A kind of determination method that coal bed gas well coal is not spent Download PDFInfo
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- CN104251136B CN104251136B CN201310265460.2A CN201310265460A CN104251136B CN 104251136 B CN104251136 B CN 104251136B CN 201310265460 A CN201310265460 A CN 201310265460A CN 104251136 B CN104251136 B CN 104251136B
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Abstract
A kind of determination method that coal bed gas well coal is not spent, belongs to coal bed gas well mining technical field.Detection determines the height of fluid column in the above oil sets annular space in coal seam bottom circle；It is worth on the basis of the circle of coal seam bottom, the data for deducting liquid level in oil sets annular space with the data on coal seam bottom circle must be produced coal and there are not angle value；If data are on the occasion of illustrating liquid level more than the circle of coal seam bottom；If data are negative value, illustrate that liquid level is reduced to below the circle of coal seam bottom；The degree that can accurately reflect that fluid column suppresses coal seam do not spent by coal, suits the mining reality of coal bed gas well, can provide foundation for formulating mining system, while proposing the final goal of coal bed gas well mining：Coal degree of not having is reduced to negative value, and fluid column does not suppress coal seam.
Description
Technical field
The present invention relates to a kind of determination method that coal bed gas well coal is not spent, belongs to coal bed gas well mining technical field.
Background technology
The coal bed gas well mining initial stage continues to use the mining technique of oil well and technical term, such as：Flowing bottomhole pressure (FBHP), submergence, casing pressure,
Pipe pressure etc., part term meets the Production requirement of coal bed gas well.The submergence concept of oil well is：Liquid level to Pump Suction Nozzle away from
From.For preventing the solution gas in crude oil from parsing, pump needs to keep higher submergence, hundreds of rice typically more than oil reservoir, pump and
Inlet is directly connected to（See accompanying drawing 1）.Coal bed gas well mining is by reducing coal seam pressure, making methane gas of the absorption in coal seam
The process of body parsing, is to reduce strata pressure, and coal bed gas well tubular column structure is different with oil well, and the inlet of pump is in coal seam Di Jie
（The bottom of coal seam section and the interface of other rock stratum）20 meters below, between pump and screen casing, there are 10 meters of distances（See accompanying drawing 2）.Coal seam
The main monitoring means of gas well mining are the changes for detecting hydrodynamic face, and submergence can not accurately reflect the position for setting out liquid level and coal seam
Put relation, it is impossible to which fluid column suppresses the degree in coal seam in accurate reflection oil sets annular space, according to the mining measure that submergence is formulated
Purpose is not strong, does not meet the principle of coal bed gas well fine-grained management.
In order to provide accurate target to the mining of coal bed gas well, the mining control technology of coal bed gas well is improved, needs to combine
The mining feature of coal bed gas proposes the term that accurate reflection fluid column suppresses coal seam degree, and in this context, technical staff innovates
Property propose the determination method that coal bed gas well coal is not spent.
Content of the invention
In order to overcome the deficiencies in the prior art, the present invention to provide a kind of determination method that coal bed gas well coal is not spent.The present invention
Purpose be that solving oil well term " submergence " can not accurately reflect asking for the compacting coal seam degree of fluid column in oil sets annular space
Topic, the mining system for coal bed gas well provide a clear and definite target, reach the purpose of precision management coal bed gas well.
A kind of determination method that coal bed gas well coal is not spent, containing following steps；
Detection determines the height of fluid column in the above oil sets annular space in coal seam bottom circle；It is worth on the basis of the circle of coal seam bottom, uses coal
The data of Ceng Di circle deduct the data of liquid level in oil sets annular space, must produce coal and not have angle value；If data are on the occasion of illustrating that liquid level exists
More than coal seam bottom circle；If data are negative value, illustrate that liquid level is reduced to below the circle of coal seam bottom；Coal degree of not having can accurately reflect fluid column pressure
The degree in coal seam processed, suits the mining reality of coal bed gas well, can provide foundation for formulating mining system, while proposing coal bed gas
The final goal of well mining：Coal degree of not having is reduced to negative value, and fluid column does not suppress coal seam.
It is an advantage of the invention that coal is not spent more accurately reflects the degree that fluid column suppresses coal seam than submergence, it is to formulate to close
Suitable mining system provides foundation, proposes coal bed gas well and does not spend the final mining target as negative value with coal.
Description of the drawings
When considered in conjunction with the accompanying drawings, by referring to detailed description below, more completely can more fully understand the present invention with
And the adjoint advantage of many of which is easily learnt, but accompanying drawing described herein is used for providing a further understanding of the present invention,
The part of the present invention is constituted, the schematic description and description of the present invention is used for explaining the present invention, does not constitute to this
Bright improper restriction, such as figure are wherein：
Fig. 1 is that pump is located at more than oil layer section hundreds of meter of structural representation.
Fig. 2 is that Pump Suction Nozzle is located at 20 meters of tiled configuration schematic diagrames below the circle of coal seam bottom.
Fig. 3 is that the Pump Suction Nozzle of the present invention is located at 20 meters of tiled configuration schematic diagrames below the circle of coal seam bottom.
The present invention is further described with reference to the accompanying drawings and examples.
Specific embodiment
Obviously, those skilled in the art belong to the guarantor of the present invention based on many modifications and variations done by spirit of the invention
Shield scope.
Embodiment 1：As shown in Figure 1, Figure 2, Figure 3 shows,
The determination method that coal bed gas well coal is not spent, the determination method that the coal is not spent are the new arts in CBM Drainage excavating technology
In language, specifically reflection coal bed gas pit shaft, fluid column suppresses a kind of method in coal seam.
The technical solution adopted in the present invention is to propose the determination method that coal is not spent, i.e.,：The above oil jacket annular in coal seam bottom circle
The height of fluid column in space.Be worth on the basis of the circle of coal seam bottom, liquid level in oil sets annular space is deducted with the data on coal seam bottom circle
Data, must produce coal and there be not angle value.If data are on the occasion of illustrating liquid level more than the circle of coal seam bottom；If data are negative value, illustrate liquid level
It is down to below the circle of coal seam bottom.The degree that can accurately reflect that fluid column suppresses coal seam do not spent by coal, suits the mining reality of coal bed gas well,
Foundation can be provided for formulating mining system, while proposing the final goal of coal bed gas well mining：Coal degree of not having is reduced to negative value, fluid column
Coal seam is not suppressed.Accompanying drawing 3 reflects coal and does not spend the difference with submergence.
Oil is mended away from 1, surface pipe 2, protective casing 3, reflector 4, artificial bottom of a well 5, finishing drilling well depth 6, hydrodynamic face 7, pumping
11, coal seam section 12, oil layer section 13 are not spent in entrance 8, coal seam bottom circle 9, submergence 10, coal；
In Fig. 1, pump is located at more than oil layer section hundreds of rice；In Fig. 2 and Fig. 3, Pump Suction Nozzle is located at 20 meters below the circle of coal seam bottom
Left and right.
Coal is not spent and more accurately reflects the degree that fluid column suppresses coal seam than submergence, is to formulate suitable mining system to carry
For foundation, propose coal bed gas well and the final mining target as negative value is not spent with coal.On the basis of here invention, the drop of special project is carried out
The engineering that low coal is not spent.Coal bed gas individual well coal does not spend 29 meters of average reduction, 40,000 side of the gas production that increases day by day.
Embodiment 2；
After novelty proposes the determination method that coal is not spent, do not spend for coal be on the occasion of and the larger well of data carry out dropping coal and do not have
Degree engineering.Rational mining system is formulated to the irrational well of mining system；Tubular column structure is unfavorable for reducing the well that coal is not spent
Redesign rational tubular column structure；Big to the water yield, pump can not meet the measure that the well of descending liquid demand carries out changing big pump.Coal seam
Gas individual well coal does not spend 29 meters of average reduction, 40,000 side of the gas production that increases day by day.
Embodiment 3；
Coal seam bottom circle data deduct dynamic fluid level data and show that the coal degree of not having of 013 well of Hu bottom has 95 meters, and data are larger.Through analysis
Judging dewatering needs can not be met for dropping the equipment that coal is not spent, having changed the tubing pump of big model according to demand, drop do not spent by coal
As little as 5 meters, daily output tolerance rises to 4067 sides by 2231 sides, and 1836 side of the gas production that increases day by day, effect of increasing production are obvious.
As described above, explained to embodiments of the invention, but as long as essentially without departing from this
Bright inventive point and effect can have a lot of deformations, and this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (1)
1. a kind of determination method that coal bed gas well coal is not spent, it is characterised in that containing following steps；
Detection determines the height of fluid column in the above oil sets annular space in coal seam bottom circle；It is worth on the basis of the circle of coal seam bottom, uses coal seam bottom
The data on boundary deduct the data of liquid level in oil sets annular space, must produce coal and not have angle value；If data are on the occasion of illustrating liquid level in coal seam
More than bottom circle；If data are negative value, illustrate that liquid level is reduced to below the circle of coal seam bottom；Coal degree of not having can accurately reflect fluid column compacting coal
The degree of layer, suits the mining reality of coal bed gas well, can provide foundation for formulating mining system, while proposing coal bed gas well row
The final goal that adopts：Coal degree of not having is reduced to negative value, and fluid column does not suppress coal seam.
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| CN201310265460.2A CN104251136B (en) | 2013-06-28 | 2013-06-28 | A kind of determination method that coal bed gas well coal is not spent |
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| CN104251136A CN104251136A (en) | 2014-12-31 |
| CN104251136B true CN104251136B (en) | 2017-03-15 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111305812B (en) * | 2018-11-27 | 2023-05-26 | 中国石油天然气股份有限公司 | Method, device and storage medium for detecting abnormality of coal-bed gas well |
| CN111255431A (en) * | 2018-11-30 | 2020-06-09 | 中国石油天然气集团有限公司 | Method and device for optimizing small-curvature-radius directional well |
Citations (6)
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| US4279307A (en) * | 1979-03-09 | 1981-07-21 | P. H. Jones Hydrogeology, Inc. | Natural gas production from geopressured aquifers |
| CN201756917U (en) * | 2010-08-09 | 2011-03-09 | 北京奥瑞安能源技术开发有限公司 | Production pipe for coal bed gas |
| CN102493788A (en) * | 2011-12-15 | 2012-06-13 | 中国石油天然气股份有限公司 | Method of gas recovery by water drainage for high-coal-rank coal-bed methane well |
| CN202937296U (en) * | 2012-11-17 | 2013-05-15 | 中国石油化工股份有限公司 | Multifunctional coal bed gas exploitation process pipe string |
| CN202954747U (en) * | 2012-10-31 | 2013-05-29 | 北京九尊能源技术股份有限公司 | Drainage and production string of coal-bed gas well |
| CN104100237A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Draining and mining method for coal-bed gas well |
-
2013
- 2013-06-28 CN CN201310265460.2A patent/CN104251136B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279307A (en) * | 1979-03-09 | 1981-07-21 | P. H. Jones Hydrogeology, Inc. | Natural gas production from geopressured aquifers |
| CN201756917U (en) * | 2010-08-09 | 2011-03-09 | 北京奥瑞安能源技术开发有限公司 | Production pipe for coal bed gas |
| CN102493788A (en) * | 2011-12-15 | 2012-06-13 | 中国石油天然气股份有限公司 | Method of gas recovery by water drainage for high-coal-rank coal-bed methane well |
| CN202954747U (en) * | 2012-10-31 | 2013-05-29 | 北京九尊能源技术股份有限公司 | Drainage and production string of coal-bed gas well |
| CN202937296U (en) * | 2012-11-17 | 2013-05-15 | 中国石油化工股份有限公司 | Multifunctional coal bed gas exploitation process pipe string |
| CN104100237A (en) * | 2013-04-03 | 2014-10-15 | 中国石油天然气股份有限公司 | Draining and mining method for coal-bed gas well |
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