CN109184635A - A kind of method of discrimination of coal bed gas well main product gas-bearing formation - Google Patents
A kind of method of discrimination of coal bed gas well main product gas-bearing formation Download PDFInfo
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- CN109184635A CN109184635A CN201811149491.0A CN201811149491A CN109184635A CN 109184635 A CN109184635 A CN 109184635A CN 201811149491 A CN201811149491 A CN 201811149491A CN 109184635 A CN109184635 A CN 109184635A
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- gas
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- mining
- coal seam
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- 239000003245 coal Substances 0.000 title claims abstract description 71
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005065 mining Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000012856 packing Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 238000003795 desorption Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 8
- 239000002356 single layer Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/006—Production of coal-bed methane
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/14—Obtaining from a multiple-zone well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/34—Arrangements for separating materials produced by the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Examining Or Testing Airtightness (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention belongs to cbm development and mining technical field, the method for discrimination of specifically a kind of coal bed gas well main product gas-bearing formation.Include the following steps, the existing oil pipe of coal bed gas well is produced into water, the mining system of annular space production gas is changed to oil pipe and produces gas water production system；In oil pipe bottom connector rails formula plunger pump, upper and lower in pump is separately connected mechanical packer；According to the different buried depths of multilayer coal, position is specifically fixed toward deep pump setting depth and the packer of being sequentially adjusted in from shallow, by opening packer, realizes effective packing and single layer mining to adjacent coal seam above and below target zone；To target zone mining certain time, after gas yield is basicly stable, packer is closed, adjust position corresponding to pump setting depth to next layer of purpose coal seam, after gas stable yield, successively adjustment pump hangs the position with packer downwards, realizes the single layer mining one by one to multilayer coal；Average product after stablizing according to each purpose coal seam mining, judges the main product gas-bearing formation of coal bed gas well.
Description
Technical field
The invention belongs to cbm development and mining technical field, the differentiation side of specifically a kind of coal bed gas well main product gas-bearing formation
Method.
Background technique
In the cbm development in multilayer coal region, in order to improve cbm development efficiency, cost, many coal bed gas are reduced
Well carries out coal-bed gas exploitation by the way of developing multiple target zones simultaneously.But it should tend not to clearly judge in the process
Which coal seam the gas of coal bed gas well output is mainly derived from, and brings additional trouble to coal bed gas extraction instead, or even have
Interlayer interference can be generated between a little coal seams, the whole of coal bed gas well is reduced and produces gas effect.Therefore, a regional coal-seam gas well is found out
It is significant to improve gas producing efficiency to cbm development is instructed for main product gas-bearing formation.
Summary of the invention
For the present invention in order to solve in multiple seam regional coal-seam gas development process, main product gas-bearing formation is indefinite to produce band to coal bed gas
The problem come, provides a kind of method of discrimination of coal bed gas well main product gas-bearing formation.
The present invention takes following technical scheme: a kind of method of discrimination of coal bed gas well main product gas-bearing formation, comprising the following steps:
1) in oil pipe bottom connector rails formula plunger pump, bottom union tail and silk plug are pumped.
2) it is separately connected a mechanical packer in the top/bottom part of rod-type plunger pump, the spacing of two packers is greater than quilt
Test the thickness in coal seam.
3) by packer and plunger pump tripping in, temporary close packer.
4) mining equipment is run after being installed, water flooding is entered in oil pipe by plunger pump, and via ground tubes rows
Out.
5) after when shaft bottom, head of liquid is reduced to coal seam critical desorption pressures, coal seam starts to desorb, when well head pressure gauge is rigid
When having pressure display, packer work is opened, realizes the effect insulated to coal seam top/bottom part.
6) it is again started up mining system, gas liquid mixture is discharged well head through oil pipe and enters in moisture trap, separates
Water afterwards enters in blowoff basin, and the gas after separation enters gathering station through appendix.
7) after mining, coal bed gas well gas production is relatively stable, without when changing by a relatively large margin, records coal bed gas in the period
The daily output after the total gas production and stabilization of well.
8) plunger pump and packer are adjusted to next purpose coal seam, recycle coal by the length for increasing oil pipe by ground
The draining of layer, until daily output tends towards stability, then carries out the packing in third coal seam, test, repeatedly.
9) the production gas situation in the multiple coal seams of Comprehensive Correlation, judges the main product gas-bearing formation of coal bed gas well.
Compared with prior art, the invention has the following advantages:
(1) it is simple to sentence knowledge method, strong operability.The coal bed gas well main product gas-bearing formation sentences knowledge method core component only by two
Packer and plunger pump composition, downhole tool is few, and connection structure is simple, can reduce the failure rate in the course of work, improves system
Operability.
(2) main product layer identifying result is reliable.Effectively purpose coal seam can be kept apart by the effect of two packers,
The interference for avoiding closing on coal seam divides the conjunction layer mining in multiple coal seams and is independent single layer coal mining unit, ensures main product gas
Layer sentences the reliability of knowledge.
Detailed description of the invention
Fig. 1 is that coal bed gas well main product gas-bearing formation sentences knowledge method connection schematic diagram；
The coal seam 1- in figure, the coal seam 2-, the coal seam 3-, 4- silk plug, 5- tail pipe, 6- packer, 7- plunger pump, 8- casing, 9- oil jacket ring
Sky, 10- oil pipe, 11- sucker rod, 12- pressure gauge, 13- ring flange, 14- pressure limiting valve, 15- moisture trap, 16- electronic flow
Meter, 17- appendix, 18- solenoid valve, 19- blowoff basin.
Specific embodiment
Fig. 1 is that coal bed gas well main product gas-bearing formation sentences knowledge method connection schematic diagram, and packer and plunger pump are lowered into top coal
The position of layer 1.Packer is closed in advance, runs ground mining system, and ground is discharged in the well tubing in pit shaft.Work as well head pressure
When table has pressure display, packer is opened, 1 top and the bottom of coal seam are insulated, avoids closing on coal seam its yield is affected.This
When, the gas liquid mixture of output enters ground moisture trap through oil pipe, when the liquid isolated ought highly reach setting
When position, solenoid valve is opened, and water is entered in blowoff basin by drainpipe.The gas isolated, well air delivering pipeline enter gathering station,
When coal seam 1 is after the mining certain time daily output is stablized, the mining for stopping this layer of coal is tested, and can pass through electronic flowmeter meter at this time
Cumulative gas production and the daily output after stabilization since amount mining.
A kind of method of discrimination of coal bed gas well main product gas-bearing formation, comprising the following steps:
1) in 10 bottom connector rails formula plunger pump 7 of oil pipe, bottom union tail 5 and silk plug 4 are pumped；
2) it is separately connected a mechanical packer 6 in the top/bottom part of rod-type plunger pump 7, the spacing of two packers 6 is greater than quilt
Test the thickness in coal seam；
3) by 7 tripping in of packer 6 and plunger pump, temporary close packer 6；
4) mining equipment is run after being installed, water flooding is entered in oil pipe 10 by plunger pump 7, and via ground tubes rows
Out；
5) after when shaft bottom, head of liquid is reduced to 1 critical desorption pressures of coal seam, coal seam 1 starts to desorb, when well head pressure gauge 12 is rigid
When having pressure display, opens packer 6 and work, realize the effect insulated to 1 top/bottom part of coal seam；
6) it is again started up mining system, gas liquid mixture is discharged well head through oil pipe and enters in moisture trap 15, after separation
Water enter in blowoff basin 19, the gas after separation through appendix 17 enter gathering station；
7) after mining, coal bed gas well gas production is relatively stable, without when changing by a relatively large margin, records coal bed gas well in the period
The daily output after total gas production and stabilization；
8) plunger pump 7 and packer 6 are adjusted to next purpose coal seam 2, recycle coal by the length for increasing oil pipe 10 by ground
The draining of layer 1, until daily output tends towards stability, then carries out the packing in third coal seam 3, test, repeatedly；
9) the production gas situation in the multiple coal seams of Comprehensive Correlation, judges the main product gas-bearing formation of coal bed gas well.
Claims (1)
1. a kind of method of discrimination of coal bed gas well main product gas-bearing formation, it is characterised in that: the following steps are included: 1) in oil pipe (10) bottom
It connects rod-type plunger pump (7), pump bottom union tail (5) and silk plug (4)；
2) mechanical packer (6), the spacing of two packers (6) are separately connected in the top/bottom part of rod-type plunger pump (7)
Greater than the thickness in tested coal seam；
3) by packer (6) and plunger pump (7) tripping in, temporary close packer (6)；
4) mining equipment is run after being installed, water flooding is entered in oil pipe (10) by plunger pump (7), and via ground pipeline
Discharge；
5) after when shaft bottom, head of liquid is reduced to coal seam (1) critical desorption pressures, coal seam (1) starts to desorb, and works as well head pressure gauge
(12) when just having pressure display, packer (6) work is opened, realizes the effect insulated to coal seam (1) top/bottom part；
6) it is again started up mining system, gas liquid mixture is discharged well head through oil pipe and enters in moisture trap (15), separates
Water afterwards enters in blowoff basin (19), and the gas after separation enters gathering station through appendix (17)；
7) after mining, coal bed gas well gas production is relatively stable, without when changing by a relatively large margin, records coal bed gas well in the period
The daily output after total gas production and stabilization；
8) length for increasing oil pipe (10) by ground, is adjusted to next purpose coal seam for plunger pump (7) and packer (6)
(2), the draining of coal seam (1) is recycled, until daily output tends towards stability, then carries out the packing of third coal seam (3), test, such as
This is repeatedly；
9) the production gas situation in the multiple coal seams of Comprehensive Correlation, judges the main product gas-bearing formation of coal bed gas well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149491.0A CN109184635B (en) | 2018-09-29 | 2018-09-29 | Method for judging main gas production layer of coal-bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149491.0A CN109184635B (en) | 2018-09-29 | 2018-09-29 | Method for judging main gas production layer of coal-bed gas well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109184635A true CN109184635A (en) | 2019-01-11 |
| CN109184635B CN109184635B (en) | 2021-05-14 |
Family
ID=64907978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811149491.0A Active CN109184635B (en) | 2018-09-29 | 2018-09-29 | Method for judging main gas production layer of coal-bed gas well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922594A (en) * | 2022-07-21 | 2022-08-19 | 太原理工大学 | Method for deep crack type geothermal segmented packing and layered mining |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382028Y (en) * | 1998-11-16 | 2000-06-07 | 马建国 | Dynamic casing well tester |
| CN102191933A (en) * | 2011-03-30 | 2011-09-21 | 北京万普隆能源技术有限公司 | Process for measuring and controlling produced gas of coal bed gas well |
| US20130180709A1 (en) * | 2012-01-17 | 2013-07-18 | Chevron U.S.A. Inc. | Well Completion Apparatus, System and Method |
| CN103590813A (en) * | 2013-10-30 | 2014-02-19 | 中国石油天然气股份有限公司 | Method, tubular column and device for testing dynamic reserves of two-layer commingled gas production well |
| CN104747144A (en) * | 2015-02-06 | 2015-07-01 | 中国石油天然气股份有限公司 | Geological stratum selection method based on natural gas multilayer system partial pressure solution |
| CN106499384A (en) * | 2016-11-16 | 2017-03-15 | 中煤科工集团西安研究院有限公司 | Coal bed gas directional well injection/pressure fall-off test test device and its method |
| CN107201893A (en) * | 2017-07-28 | 2017-09-26 | 中国矿业大学 | A kind of multiple seam gas well throughput contribution rate test grading device |
| CN107218036A (en) * | 2017-07-28 | 2017-09-29 | 中国矿业大学 | A kind of multiple seam gas well air-water two phase flow lamination test device |
| CN107476784A (en) * | 2017-07-21 | 2017-12-15 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of CBM Drainage mining method of oil pipe production aquatic products gas |
-
2018
- 2018-09-29 CN CN201811149491.0A patent/CN109184635B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2382028Y (en) * | 1998-11-16 | 2000-06-07 | 马建国 | Dynamic casing well tester |
| CN102191933A (en) * | 2011-03-30 | 2011-09-21 | 北京万普隆能源技术有限公司 | Process for measuring and controlling produced gas of coal bed gas well |
| US20130180709A1 (en) * | 2012-01-17 | 2013-07-18 | Chevron U.S.A. Inc. | Well Completion Apparatus, System and Method |
| CN103590813A (en) * | 2013-10-30 | 2014-02-19 | 中国石油天然气股份有限公司 | Method, tubular column and device for testing dynamic reserves of two-layer commingled gas production well |
| CN104747144A (en) * | 2015-02-06 | 2015-07-01 | 中国石油天然气股份有限公司 | Geological stratum selection method based on natural gas multilayer system partial pressure solution |
| CN106499384A (en) * | 2016-11-16 | 2017-03-15 | 中煤科工集团西安研究院有限公司 | Coal bed gas directional well injection/pressure fall-off test test device and its method |
| CN107476784A (en) * | 2017-07-21 | 2017-12-15 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of CBM Drainage mining method of oil pipe production aquatic products gas |
| CN107201893A (en) * | 2017-07-28 | 2017-09-26 | 中国矿业大学 | A kind of multiple seam gas well throughput contribution rate test grading device |
| CN107218036A (en) * | 2017-07-28 | 2017-09-29 | 中国矿业大学 | A kind of multiple seam gas well air-water two phase flow lamination test device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114922594A (en) * | 2022-07-21 | 2022-08-19 | 太原理工大学 | Method for deep crack type geothermal segmented packing and layered mining |
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| CN109184635B (en) | 2021-05-14 |
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