CN104018813A - Coal bed gas exploitation method - Google Patents
Coal bed gas exploitation method Download PDFInfo
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- CN104018813A CN104018813A CN201410239049.2A CN201410239049A CN104018813A CN 104018813 A CN104018813 A CN 104018813A CN 201410239049 A CN201410239049 A CN 201410239049A CN 104018813 A CN104018813 A CN 104018813A
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- carbon dioxide
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Abstract
The invention belongs to the technical field of coal bed gas exploitation and particularly relates to a coal bed gas exploitation method. According to the coal bed gas exploitation method, on one hand, electricity is generated through a high-concentration gas power generating set by using coal bed gas produced through a horizontal well to maintain the daily drainage and exploitation operation of a vertical shaft and the operation of a peripheral compressed natural gas pressure station; on the other hand, after carbon dioxide in the tail gas of the high-concentration gas power generating set is purified and compressed into a certain amount of liquid carbon dioxide through a carbon dioxide processing and pumping device, the liquid carbon dioxide is pumped into the vertical well in an intermittent injection mode, and thus the double effects of environment protection and production increase are achieved.
Description
Technical field
The invention belongs to Coal-seam Gas Recovery Technologies field, be specifically related to a kind of coal bed methane exploring method.
Background technology
From in June, 2006 < of General Office of the State Council < about accelerating clearly to propose in some suggestion > > of coal bed gas (coal mine gas) methane drainage and utilization project since " must adhere to first taking out afterwards adopt, administer and utilize the policy developing simultaneously ", China has started ground coal bed gas exploration and development agitation, according to interrelated data, show, China's coal bed gas well has reached 15000 mouthfuls at present, but wherein less than half, give vent to anger, average product only has 400～600 sides, does not far reach the value of business development.
To sum up, how to improve coal bed gas well yield and reduce coal bed gas individual well cost, become the key of coal bed gas commercial development.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of coal bed methane exploring method that improves coal bed gas well yield and reduce coal bed gas individual well cost is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of coal bed methane exploring method, and its step is as follows:
One, from ground, first implement a bite straight well, then at this straight well periphery, be drilled with water horizontal well and dock with described straight well destination layer;
Two, in straight well, be lowered to suction pump and implement to draw water operation, until horizontal well enters the extensive gas production stage;
Three, now at place, horizontal well gas outlet, a set of high concentration fuel gas generation unit is installed, is utilized the coal bed gas of horizontal well output to generate electricity by high concentration fuel gas generation unit, to maintain the running of the daily mining operation of straight well and periphery compressed natural gas pressurizing point;
Four, utilize carbon dioxide processing and pump into device by the carbon dioxide purification in high concentration fuel gas generation unit tail gas, recompressing into liquid;
Five, when liquid carbon dioxide is hoarded after 10～20 tons, adopt batch (-type) injection mode, pump into liquid carbon dioxide by straight well well head every day, continues to pump into liquid carbon dioxide 10～20 days, then close straight well well head and stop daily extraction operation;
Six,, after the carbon dioxide content in the output gas of straight well ground drops to 5%, continue the daily mining operation of straight well;
Seven, utilize carbon dioxide processing and pump into device continuation manufacture liquid CO 2, until the amount of liquid carbon dioxide is enough to carry out operation next time.
Described straight well docks with horizontal well and adopts the U-shaped well routine techniques of current coal bed gas.
The required coal bed gas amount of described high concentration fuel gas generation unit depends on carbon dioxide processing and pumps into device, the daily mining of straight well and periphery compressed natural gas station running power demand, remains coal bed gas for the defeated utilization of downstream collection.
Described carbon dioxide is processed and is pumped into device and can purify, compresses and pump into carbon dioxide.
Beneficial effect of the present invention:
1, fuel gas generation unit utilize alternative field diesel generation, reduce costs to a certain extent;
2, the carbon dioxide producing in fuel gas generation unit power generation process pumps in coal seam, can reach the double effect of environmentally friendly yield-increasing.
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is principle of the invention schematic diagram.
In figure: 1, straight well, 2, horizontal well, 3, high concentration fuel gas generation unit, 4, carbon dioxide processing and pump into device.
The specific embodiment
Referring to Fig. 1, a kind of coal bed methane exploring method that the present invention proposes, its concrete steps are as follows:
One, from ground, first implement a bite straight well 1, then at this straight well 1 periphery, be drilled with water horizontal well 2 and dock with described straight well 1 destination layer;
Two, in straight well 1, be lowered to suction pump and implement to draw water operation, until horizontal well 2 enters the extensive gas production stage;
Three, now at horizontal well 2 places, gas outlet, a set of high concentration fuel gas generation unit 3 is installed, utilize the coal bed gas of horizontal well 2 outputs to generate electricity by high concentration fuel gas generation unit 3, to maintain the running of the daily mining operation of straight well 1 and periphery compressed natural gas pressurizing point;
Four, utilize carbon dioxide processing and pump into device 4 by the carbon dioxide purification in high concentration fuel gas generation unit 3 tail gas, recompressing into liquid;
Five, when liquid carbon dioxide is hoarded after 10～20 tons, adopt batch (-type) injection mode, pump into liquid carbon dioxide by straight well 1 well head every day, continues to pump into liquid carbon dioxide 10～20 days, then close straight well 1 well head and stop daily extraction operation;
Six,, after the carbon dioxide content in straight well 1 ground output gas drops to 5%, continue the daily mining operation of straight well 1;
Seven, utilize carbon dioxide processing and pump into device 4 continuation manufacture liquid CO 2s, until the amount of liquid carbon dioxide is enough to carry out operation next time.
Described straight well 1 docks with horizontal well 2 and adopts the U-shaped well routine techniques of current coal bed gas.
The required coal bed gas amount of described high concentration fuel gas generation unit 3 depends on carbon dioxide processing and pumps into device 4, the daily mining of straight well 1 and periphery compressed natural gas station running power demand, remains coal bed gas for the defeated utilization of downstream collection.
Described carbon dioxide is processed and is pumped into device 4 and can purify, compresses and pump into carbon dioxide.
You need to add is that, this method is also applicable to single straight well or horizontal well, is not limited to the U-shaped well described in this method.
In addition, it should be noted that the art professional and technical personnel also knows, patent of the present invention is not limited to coal bed gas field, is equally applicable to shale gas field.
Above-mentioned example only illustrates simultaneously, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being amplified out thus or change are still among the protection domain in patent of the present invention.
Claims (1)
1. a coal bed methane exploring method, is characterized in that,
One, from ground, first implement a bite straight well (1), then at this straight well (1) periphery, be drilled with water horizontal well (2) and dock with described straight well (1) destination layer;
Two, in straight well (1), be lowered to suction pump and implement to draw water operation, until horizontal well (2) enters the extensive gas production stage;
Three, now at place, horizontal well (2) gas outlet, a set of high concentration fuel gas generation unit (3) is installed, utilize the coal bed gas of horizontal well (2) output to generate electricity by high concentration fuel gas generation unit (3), to maintain the running of the daily mining operation of straight well (1) and periphery compressed natural gas pressurizing point;
Four, utilize carbon dioxide processing and pump into device (4) by the carbon dioxide purification in high concentration fuel gas generation unit (3) tail gas, recompressing into liquid;
Five, when liquid carbon dioxide is hoarded after 10～20 tons, adopt batch (-type) injection mode, pump into liquid carbon dioxide by straight well (1) well head every day, continues to pump into liquid carbon dioxide 10～20 days, then close straight well (1) well head and stop daily extraction operation;
Six,, after the carbon dioxide content in the output gas of straight well (1) ground drops to 5%, continue the daily mining operation of straight well (1);
Seven, utilize carbon dioxide processing and pump into device (4) continuation manufacture liquid CO 2, until the amount of liquid carbon dioxide is enough to carry out operation next time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410239049.2A CN104018813A (en) | 2014-05-31 | 2014-05-31 | Coal bed gas exploitation method |
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| CN201410239049.2A CN104018813A (en) | 2014-05-31 | 2014-05-31 | Coal bed gas exploitation method |
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Cited By (8)
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| CN105927192A (en) * | 2016-06-21 | 2016-09-07 | 太原理工大学 | Method for exploiting coal bed methane in collapse old goafs and lower coal beds in combined manner |
| CN105927191A (en) * | 2016-06-21 | 2016-09-07 | 太原理工大学 | Method for combined mining of coal seam gas of cutter column type old goaf and lower coal seam |
| CN105971563A (en) * | 2016-06-21 | 2016-09-28 | 太原理工大学 | Extraction method for coal bed gas in composite old mined-out area formed through lower tool post method |
| CN106014345A (en) * | 2016-06-21 | 2016-10-12 | 太原理工大学 | Extraction method for mining formed composite goaf coalbed methane through lower caving method |
| CN106089290A (en) * | 2016-06-21 | 2016-11-09 | 太原理工大学 | The old dead zone of a kind of collaborative extraction tool post formula and the method for lower coal seam coal bed gas |
| CN106089291A (en) * | 2016-06-21 | 2016-11-09 | 太原理工大学 | A kind of collaborative extraction is caving the old dead zone of formula and the method for lower coal seam coal bed gas |
| CN107558958A (en) * | 2017-07-21 | 2018-01-09 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of discharge and mining method of hypotonic coal seam reservoirs coal bed gas horizontal well |
| CN109538167A (en) * | 2018-09-30 | 2019-03-29 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method that coal bed gas U-shaped well is segmented mining step by step |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927192A (en) * | 2016-06-21 | 2016-09-07 | 太原理工大学 | Method for exploiting coal bed methane in collapse old goafs and lower coal beds in combined manner |
| CN105927191A (en) * | 2016-06-21 | 2016-09-07 | 太原理工大学 | Method for combined mining of coal seam gas of cutter column type old goaf and lower coal seam |
| CN105971563A (en) * | 2016-06-21 | 2016-09-28 | 太原理工大学 | Extraction method for coal bed gas in composite old mined-out area formed through lower tool post method |
| CN106014345A (en) * | 2016-06-21 | 2016-10-12 | 太原理工大学 | Extraction method for mining formed composite goaf coalbed methane through lower caving method |
| CN106089290A (en) * | 2016-06-21 | 2016-11-09 | 太原理工大学 | The old dead zone of a kind of collaborative extraction tool post formula and the method for lower coal seam coal bed gas |
| CN106089291A (en) * | 2016-06-21 | 2016-11-09 | 太原理工大学 | A kind of collaborative extraction is caving the old dead zone of formula and the method for lower coal seam coal bed gas |
| CN106089290B (en) * | 2016-06-21 | 2018-03-02 | 太原理工大学 | A kind of method for cooperateing with the old dead zone of extraction tool post formula and lower coal seam coal bed gas |
| CN106089291B (en) * | 2016-06-21 | 2018-03-02 | 太原理工大学 | A kind of method for cooperateing with extraction to be caving the old dead zone of formula and lower coal seam coal bed gas |
| CN106014345B (en) * | 2016-06-21 | 2018-11-13 | 太原理工大学 | A kind of lower part caving method exploits the pumping method for the compound old dead zone coal bed gas to be formed |
| CN107558958A (en) * | 2017-07-21 | 2018-01-09 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of discharge and mining method of hypotonic coal seam reservoirs coal bed gas horizontal well |
| CN109538167A (en) * | 2018-09-30 | 2019-03-29 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of method that coal bed gas U-shaped well is segmented mining step by step |
| CN109538167B (en) * | 2018-09-30 | 2021-11-12 | 山西晋城无烟煤矿业集团有限责任公司 | Method for sectional step-by-step drainage and production of coal bed gas U-shaped well |
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Address after: Lin Cheng Xi Lu Lake District 550081 Guizhou city of Guiyang province No. 95 seven floor Applicant after: Guizhou Pan Jiang cbm development utilizes Co., Ltd Address before: 550081 Guizhou Province, Guiyang City Lake District century Jin Yuan shopping center business building D block 15 layer Applicant before: Guizhou Pan Jiang cbm development utilizes Co., Ltd |
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Application publication date: 20140903 |