CN105317411A - High-pressure, oxygen-free, yield-increasing and plug-release gas injection device of CBM (Coal Bed Methane) well and using method of high-pressure, oxygen-free, yield-increasing and plug-release gas injection device - Google Patents
High-pressure, oxygen-free, yield-increasing and plug-release gas injection device of CBM (Coal Bed Methane) well and using method of high-pressure, oxygen-free, yield-increasing and plug-release gas injection device Download PDFInfo
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- CN105317411A CN105317411A CN201410376288.2A CN201410376288A CN105317411A CN 105317411 A CN105317411 A CN 105317411A CN 201410376288 A CN201410376288 A CN 201410376288A CN 105317411 A CN105317411 A CN 105317411A
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Abstract
The invention provides a high-pressure, oxygen-free, yield-increasing and plug-release gas injection device of a CBM (Coal Bed Methane) well. The invention has the technical scheme that the high-pressure, oxygen-free, yield-increasing and plug-release gas injection device mainly consists of an internal combustion engine (1), a hydraulic clutch (2), a compressor (3), a fuel tank (4), a purification filter (5), gas transmission pipes (6), a dosing tank (7), a control cabinet (8) and a skid-mounted cabinet (9), wherein the internal combustion engine (1) is connected with the compressor (3) through the hydraulic clutch (2) and is connected with the compressor (3) through one gas transmission pipe (6); the compressor (3) is connected with the purification filter (5) through one gas transmission pipe (6); the fuel tank (4) is arranged above the purification filter (5); one gas transmission pipe (6) is connected with the dosing tank (7); the control cabinet (8) is arranged above the dosing tank (7). The invention also provides multiple steps of a using method of the high-pressure, oxygen-free, yield-increasing and plug-release gas injection device. According to the high-pressure, oxygen-free, yield-increasing and plug-release gas injection device of the CBM well and the using method, provided by the invention, the design is reasonable and practical, the cost is low, the operation is simple and convenient, more methane is replaced through injecting gas in a CBM reservoir, the yield of CBM is greatly increased, and a higher promotion and application value is obtained.
Description
Technical field:
The present invention relates to coal bed gas well technical field, especially coal bed gas well high pressure anaerobic volume increase de-plugging gas injection device and using method thereof.
Background technology:
The stored condition of coal bed gas in coal seam is divided into ADSORPTION STATE, free state and solubilised state, and wherein about 90% exists with ADSORPTION STATE.If coal reservoir fracture cleat system is grown better, reservoir permeability is comparatively large, and when bottom pressure is reduced to below critical desorption pressures, coal bed gas can the diffusion of desorb comparatively smoothly, and seepage flow is to shaft bottom, and then can reach ideal and open Bian benefit.But it is the outstanding problems such as hyposmosis, difficult desorption, driving force deficiency, deformation coal growth that China's coal seam reservoirs and coal bed gas open Bian present situation, this simple reach the target that expection Jian adopts benefit and is difficult to realization by controlling flowing bottomhole pressure (FBHP) with regard to causing.
Summary of the invention
The object of this invention is to provide a kind of coal bed gas well high pressure anaerobic volume increase de-plugging gas injection device, the outstanding problems such as solution China's coal seam reservoirs and coal bed gas open Bian hyposmosis, difficult desorption, driving force is not enough.
For achieving the above object, the present invention has the gas of strong adsorption capacity by injecting, by Injection Well by C0
2note in coal seam Deng gas, C0
2arrive major part and coal bed gas behind coal seam and occur to adsorb Deng gas and replace, will the CH in coal seam be adsorbed on
4desorb, the CH parsed
4migrated to producing well shaft bottom and then output ground by hole, coal seam-fissure system again.Inject gases at high pressure simultaneously, increase coal seam reservoirs energy, make coal seam reservoirs produce new crack.Utilize simultaneously and add the surface tension that surfactant reduces coal dust and water, coal dust is easily spontaneously wet out by water.Slurry has certain mobility, thus can be washed away by active water the object reaching de-plugging from the finedraw of coal seam.
Realizing the technical scheme that above-mentioned purpose adopts is: this device becomes primarily of internal combustion engine, hydraulic clutch, compressor, fuel tank, polishing filter, appendix, grug feeding jar, switch board, skid group, internal combustion engine connects compressor by hydraulic clutch, and connect compressor by appendix, compressor connects polishing filter by appendix, fuel tank is provided with above polishing filter, appendix connects grug feeding jar, above grug feeding jar, be provided with switch board.
The using method of this device comprises the following steps:
(1), under the condition of injection pressure lower than the fracture pressure of coalbed methane reservoir, by Injection Well to injecting gas in coalbed methane reservoir, the gas of injection is easier than methane under coalbed methane reservoir condition is adsorbed onto coal seam;
(2), after step (), valve-off, makes the gas injected replace with the methane being adsorbed onto coalbed methane reservoir;
(3) water pumping gas production of coal bed gas, is carried out by recovery well.
The gas injected is the carbonated gas of bag, and the appendix of the gas of injection adopts high temperature high voltage resistant flexible pipe to inject.
One of the using method of this device is further comprising the steps of or all:
A. before injecting gas, calculate the adding amount of surfactant according to the liquid outlet quantity of earlier machine well, well depth and gas production, and annotate, be pressed in gap, coal seam to reach when injecting gas, increase the activity of coal dust and formation water in gap;
B. before injecting gas, calculate the adding amount of corrosion inhibiter according to the actual conditions of down-hole string, and carry out control filling, prevent carbon dioxide gas from knowing from experience and corrosion is caused to down-hole string;
C. according to the gas injection rate of the pressure-sensitive data determination high-pressure gas injection in well in operation coal seam, injection pressure and gas injection speed, injection pressure in gas injection process, must be controlled well, to reduce bottom hole pressure surge, reservoir is damaged;
D. after operation completes, gas outlet is connected to surge tank and carries out open flow, reached the object of taking coal dust and shaft bottom liquid out of, after pressure is steady, proceeds to normal production.
Described whole parts are all integrated on skid, can carry out dragging with vehicle-mounted of skid.
Activated carbon felt be with containing charcoal be main material as raw material, the hydrophobic adsorbent made through high temperature carbonization and activation.
Internal combustion engine by hydraulic clutch connect compressor produce gases at high pressure (main component carbon dioxide) through polishing filter filter after by appendix by Injection Well to injecting gas in coalbed methane reservoir.Before injecting gas, grug feeding jar adds surfactant and corrosion inhibiter automatically by appendix, thus reaches the object of de-plugging, anticorrosion, pressure break.Package unit can carry out dragging with vehicle-mounted of skid, and adopts switch board and pressure sensor to carry out the control of injection pressure and injection rate, reaches the object to shaft bottom injecting carbon dioxide with this.
Beneficial effect of the present invention: the present invention's practicality reasonable in design, with low cost, easy and simple to handle, by to injecting gas in coalbed methane reservoir, displace more methane, increase substantially the output of coal bed gas, improve enterprises production efficiency and economic benefit, there is higher application value.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, coal bed gas well high pressure anaerobic volume increase de-plugging gas injection device and using method thereof, form primarily of internal combustion engine 1, hydraulic clutch 2, compressor 3, fuel tank 4, polishing filter 5, appendix 6, grug feeding jar 7, switch board 8, skid cabinet 9, internal combustion engine 1 connects compressor 3 by hydraulic clutch 2, and connect compressor 3 by appendix 6, compressor 3 connects polishing filter 5 by appendix 6, fuel tank 4 is provided with above polishing filter 5, appendix 6 connects grug feeding jar (7), is provided with switch board 8 above grug feeding jar 7.
Embodiment 1: coal bed gas well sleeve opening is flexible coupling to appendix 6 by high temperature high voltage resistant, open the emptying of sleeve pipe gas injection gate, by high temperature high voltage resistant flexible pipe splicing sleeve, one is connected to appendix 6, internal combustion engine 1 is connected with switch board 8, start automatic medicine adding apparatus 7, keep a grip on according to coal bed gas well liquid outlet quantity, well depth and gas production and down-hole the adding amount that actual conditions calculate surfactant and corrosion inhibiter, chemicals dosing plant is closed after completing filling automatically.After dosing completes, under the condition of injection pressure lower than the fracture pressure of coalbed methane reservoir, compressor 3 is connected by hydraulic clutch 2 by switch board 8 starting apparatus combustion engine 1, the gas that compressor 3 produces injects through polishing filter 5, according to the gas injection rate of the pressure-sensitive data determination high-pressure gas injection in well in operation coal seam, injection pressure and gas injection speed, carry out gas injection, in gas injection process, must control injection pressure well.After operation completes, closed by switch board 8 and run, close gas injection valve makes the gas of injection replace with the methane being adsorbed onto coalbed methane reservoir simultaneously, gas outlet is connected to surge tank and carries out open flow, reach the object of taking coal dust and shaft bottom liquid out of, so far complete the gas injection water pumping gas production work of this well.
Embodiment recited above is only be described the preferred embodiment of this patent; not the design of this patent and scope are limited; under the prerequisite not departing from this patent design concept; the various modification that in this area, the technical scheme of common engineers and technicians to this patent is made and improvement; the protection domain of this patent all should be fallen into; the technology contents of this patent request protection, all records in detail in the claims.
Claims (6)
1. coal bed gas well high pressure anaerobic volume increase de-plugging gas injection device and using method thereof, it is characterized in that: primarily of internal combustion engine (1), hydraulic clutch (2), compressor (3), fuel tank (4), polishing filter (5), appendix (6), grug feeding jar (7), switch board (8), skid cabinet (9) forms, internal combustion engine (1) connects compressor (3) by hydraulic clutch (2), and connect compressor (3) by appendix (6), compressor (3) connects polishing filter (5) by appendix (6), fuel tank (4) is provided with in polishing filter (5) top, appendix (6) connects grug feeding jar (7), switch board (8) is provided with in the top of grug feeding jar (7), the using method of this device comprises the following steps:
(1), under the condition of injection pressure lower than the fracture pressure of coalbed methane reservoir, by Injection Well to injecting gas in coalbed methane reservoir, the gas of injection is easier than methane under coalbed methane reservoir condition is adsorbed onto coal seam;
(2), after step (), valve-off, makes the gas injected replace with the methane being adsorbed onto coalbed methane reservoir;
(3) water pumping gas production of coal bed gas, is carried out by recovery well.
2. coal bed gas well high pressure anaerobic volume increase de-plugging gas injection device according to claim 1 and using method thereof, is characterized in that: the gas of injection is the carbonated gas of bag.
3. coal bed gas well high pressure anaerobic volume increase de-plugging gas injection device according to claim 1 and 2 and using method thereof, is characterized in that: the appendix of the gas of injection adopts high temperature high voltage resistant flexible pipe to inject.
4. coal bed gas well high pressure anaerobic according to claim 1 and 2 volume increase de-plugging gas injection device and using method thereof, is characterized in that: one of the using method of this device is further comprising the steps of or all:
A. before injecting gas, calculate the adding amount of surfactant according to the liquid outlet quantity of earlier machine well, well depth and gas production, and annotate, be pressed in gap, coal seam to reach when injecting gas, increase the activity of coal dust and formation water in gap;
B. before injecting gas, calculate the adding amount of corrosion inhibiter according to the actual conditions of down-hole string, and carry out control filling, prevent carbon dioxide gas from knowing from experience and corrosion is caused to down-hole string;
C. according to the gas injection rate of the pressure-sensitive data determination high-pressure gas injection in well in operation coal seam, injection pressure and gas injection speed, injection pressure in gas injection process, must be controlled well, to reduce bottom hole pressure surge, reservoir is damaged;
D. after operation completes, gas outlet is connected to surge tank and carries out open flow, reached the object of taking coal dust and shaft bottom liquid out of, after pressure is steady, proceeds to normal production.
5. coal bed gas well high pressure anaerobic volume increase de-plugging gas injection device according to claim 1 and 2 and using method thereof, is characterized in that: described (1) to (8) parts are all integrated on skid (9), can carry out dragging with vehicle-mounted of skid.
6. coal bed gas well high pressure anaerobic according to claim 1 and 2 volume increase de-plugging gas injection device and using method thereof, is characterized in that: activated carbon felt be with containing charcoal be main material as raw material, the hydrophobic adsorbent made through high temperature carbonization and activation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410376288.2A CN105317411A (en) | 2014-08-03 | 2014-08-03 | High-pressure, oxygen-free, yield-increasing and plug-release gas injection device of CBM (Coal Bed Methane) well and using method of high-pressure, oxygen-free, yield-increasing and plug-release gas injection device |
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| CN201410376288.2A CN105317411A (en) | 2014-08-03 | 2014-08-03 | High-pressure, oxygen-free, yield-increasing and plug-release gas injection device of CBM (Coal Bed Methane) well and using method of high-pressure, oxygen-free, yield-increasing and plug-release gas injection device |
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| CN105317411A true CN105317411A (en) | 2016-02-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703766A (en) * | 2017-02-24 | 2017-05-24 | 牛辉英 | Yield-increasing system and yield-increasing method for diesel-engine exhaust injecting oil-gas layer |
| CN108729891A (en) * | 2018-05-04 | 2018-11-02 | 北京方圆天地油气技术有限责任公司 | A kind of CBM Fracturing blocking more bout compressed air method for removing blockage of well |
| CN109798095A (en) * | 2019-03-08 | 2019-05-24 | 南阳市天达同兴石油技术有限公司 | A kind of coal-bed-gas production-increase pressure disturbance device and method for increasing yield of coal bed gas |
| CN114718535A (en) * | 2022-03-22 | 2022-07-08 | 太原理工大学 | Method for reversely unblocking coal-bed gas well by using high-pressure gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106703766A (en) * | 2017-02-24 | 2017-05-24 | 牛辉英 | Yield-increasing system and yield-increasing method for diesel-engine exhaust injecting oil-gas layer |
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| CN109798095A (en) * | 2019-03-08 | 2019-05-24 | 南阳市天达同兴石油技术有限公司 | A kind of coal-bed-gas production-increase pressure disturbance device and method for increasing yield of coal bed gas |
| CN114718535A (en) * | 2022-03-22 | 2022-07-08 | 太原理工大学 | Method for reversely unblocking coal-bed gas well by using high-pressure gas |
| CN114718535B (en) * | 2022-03-22 | 2023-09-01 | 太原理工大学 | Method for reversely blocking coal-bed gas well by utilizing high-pressure gas |
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Application publication date: 20160210 |