CN103470236B - Coal bed gas well Automatic-heating reinjected water yield-increasing technique - Google Patents
Coal bed gas well Automatic-heating reinjected water yield-increasing technique Download PDFInfo
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- CN103470236B CN103470236B CN201310421979.5A CN201310421979A CN103470236B CN 103470236 B CN103470236 B CN 103470236B CN 201310421979 A CN201310421979 A CN 201310421979A CN 103470236 B CN103470236 B CN 103470236B
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Abstract
This patent relates to a kind of coal bed gas well Automatic-heating reinjected water yield-increasing technique, comprises the following steps: A: precipitate and filtration treatment Produced Liquid, and precipitation and filtration treatment carry out one or many, the solid particle of removing more than 95%; B: after process, clear liquid is by solar energy heating, makes water temperature reach 60 ~ 90 DEG C; C: hot water injects pit shaft by hot water re-injection pipeline, and hot water re-injection pipeline stretches into below coal seam by oil jacket annular space, and former wellbore fluid temperature is raised more than 20 DEG C; D: above step cycle is carried out.Advantage is: this patent injects heat energy by injecting hot water mode to wellbore fluid, increases the Brownian movement of coal dust in wellbore fluid, thus increases the decentralization of coal dust in water, be beneficial to and reduce coal powder density and discharged by coal dust.In addition, partial heat energy is passed to the coalbed methane reservoir of near wellbore zone, can increase the free energy of coal bed gas, thus increases coal bed gas desorption rate, and meanwhile, when gases are heated, they expand, can expand seepage channel, improve reservoir permeability, realize coal-bed-gas production-increase.
Description
Technical field
This patent belongs to the yield-increasing technique technical field in coal bed gas well water pumping gas production process, particularly relates to a kind of coal bed gas well Automatic-heating reinjected water yield-increasing technique.
Background technology
Coal bed gas is commonly called as gas, and be the gas resource with coal association, symbiosis, main component is CH
4.Coal bed gas is clean fuel and industrial chemicals, and be also a kind of strong greenhouse gas, its greenhouse effect are CO
221 times, " killer " of mine safety accidents especially.Develop coal bed gas resource, for adjustment China energy resource structure, formation coal bed gas novel energy industry, improve Safety of Coal Mine Production condition, minimizing gas accident and greenhouse gas emission, tool is of great significance.
At present, China's coal bed gas well yield is still lower, and yield-increasing technology is limited.About coal bed gas heating power yield-increasing technology, forefathers have correlative study achievement, China Patent Publication No.: CN1508387A, provide " a kind of heating exploitation method of coal bed gas ", propose to inject heat energy in heat mode of handling up to coalbed methane reservoir; China Patent Publication No.: CN102536184A, provides " a kind of method of exploiting coal-bed gas of burned coal bed ".But heat heat injection mode of handling up easily causes coal seam to go out coal dust in a large number, affect mining and produce, burn the wayward combustion front in coal seam and affect later stage coal mining, therefore applying limited.
Summary of the invention
This patent provides a kind of coal bed gas well Automatic-heating reinjected water yield-increasing technique for solving in known technology the technical problem that exists, and this technique can methane output be improved.
The technical scheme that this patent is taked for the technical problem existed in solution known technology is:
A kind of coal bed gas well Automatic-heating reinjected water yield-increasing technique, comprises the following steps:
Steps A: Produced Liquid is precipitated and filtration treatment, precipitation and filtration treatment carry out one or many, the solid particle of removing more than 95%;
Step B: after process, clear liquid is by solar energy heating, makes water temperature reach 60 ~ 90 DEG C;
Step C: hot water injects pit shaft by hot water re-injection pipeline, and hot water re-injection pipeline stretches into below coal seam by oil jacket annular space, and former wellbore fluid temperature is raised more than 20 DEG C;
Step D: above step cycle is carried out.
This patent can also adopt following technical scheme:
Preferably, in steps A, coal bed gas well Produced Liquid is connected with Produced Liquid flow and coal powder density indicating gage by Produced Liquid pipeline, and controlled valve controls, and enters Produced Liquid solid particle settling tank and precipitates;
Liquid after Produced Liquid solid particle settling tank precipitation process, through ball relief valve, flap valve, Produced Liquid advanced treating tank is pumped into by water pump, Produced Liquid advanced treating tank inside forms primarily of metallic fiber sintered felt, required filter pressure is provided by the pump pressure controlling water pump, and after process, liquid is detected by treatment fluid flow and coal powder density indicating gage;
When treatment fluid flow and coal powder density indicating gage survey coal powder density value and Produced Liquid flow and coal powder density indicating gage survey coal powder density value ratio be less than or equal to 5% time, after process, clear liquid enters reinjected water heating tank through entering cold water pipeline; Otherwise after process, liquid enters water storage conditioning tank by Produced Liquid reprocessing circulation line, then returns and pump into Produced Liquid solid particle settling tank precipitation process, and circular treatment is until Produced Liquid coal powder density is up to standard.
Preferably, in step B, the clear liquid after process enters reinjected water heating tank through entering cold water pipeline, by heating lower circulation line, cold water pumps into plate solar collector heating, and hot water is by heating cocycle pipeline, through temperature control sleeve pipe, run in air valve, is back in reinjected water heating tank.
Preferred further, heating process also adopts the heating of electric auxiliary heating rod.
Preferably, in step C, after heating, hot water flows into hot water re-injection pipeline by Intelligent water valve, hot water re-injection pipeline is connected with flow velocity and temperature inductor, through sealing clamp head access well head, through evacuation system improvement centralizer used, stretch to below coalbed methane reservoir by oil jacket annular space.
The advantage that this patent has and good effect are:
After this patent have employed above technical scheme, injecting heat energy by injecting hot water mode to wellbore fluid, increasing the Brownian movement of coal dust in wellbore fluid, thus increasing the decentralization of coal dust in water, being beneficial to and reducing coal powder density and coal dust is discharged.In addition, partial heat energy is passed to the coalbed methane reservoir of near wellbore zone, can increase the free energy of coal bed gas, thus increases coal bed gas desorption rate, and meanwhile, when gases are heated, they expand, can expand seepage channel, improve reservoir permeability, realize coal-bed-gas production-increase.This technological process is simplified, and can realize centralized control and management, the purified treatment that can precipitate Produced Liquid and filter, and uses clean energy resource solar energy to heat, and meets the needs of extensive efficient, the clean exploitation of China's coal bed gas.After raising wellbore fluid temperature by Automatic-heating reinjected water, more effectively can reduce coal powder density and coal dust is discharged, meanwhile, the permeability of near wellbore zone reservoir can be improved, realize coal-bed-gas production-increase.
Accompanying drawing explanation
Fig. 1 is the basic structure schematic diagram described in this patent technique.
In figure: 1, gas production pipe; 2, evacuation system; 3, Produced Liquid pipeline; 4, Produced Liquid flow and coal powder density indicating gage; 5, control valve; 6, Produced Liquid solid particle settling tank; 7, pressure maintaining valve; 8, overflow valve; 9, blowoff valve; 10, ball relief valve; 11, flap valve; 12, water pump; 13, Produced Liquid advanced treating tank; 14, metallic fiber sintered felt; 15, treatment fluid flow and coal powder density indicating gage; 16, cold water pipeline is entered; 17, reinjected water heating tank; 18, the lower circulation line of heating; 19, plate solar collector; 20, cocycle pipeline is heated; 21, temperature control sleeve pipe; 22, outlet valve; 23, electric additional hot pin; 24, magnesium rod; 25, Intelligent water valve; 26, hot water re-injection pipeline; 27, flow velocity and temperature inductor; 28, sealing clamp head; 29, centralizer is improved; 30, coalbed methane reservoir; 31, production fluid reprocessing circulation line; 32, water storage conditioning tank; 33, T1, T2, T3, circuit and signal transmission line; 34, controller; 35, wireless signal transmission system; 36, computer control terminal.
Detailed description of the invention
For summary of the invention, the Characteristic of this patent can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1,
A kind of coal bed gas well Automatic-heating reinjected water yield-increasing technique, comprises the following steps:
Steps A: Produced Liquid is precipitated and filtration treatment, precipitation and filtration treatment carry out one or many, the solid particle of removing more than 95%;
Step B: after process, clear liquid is by solar energy heating, makes water temperature reach 60 ~ 90 DEG C;
Step C: hot water injects pit shaft by hot water re-injection pipeline, and hot water re-injection pipeline stretches into below coal seam by oil jacket annular space, and former wellbore fluid temperature is raised more than 20 DEG C;
Step D: above step cycle is carried out.
Particularly, this technique is run by the following method:
Coal bed gas well Produced Liquid is connected with Produced Liquid flow and coal powder density indicating gage 4 by Produced Liquid pipeline 3, controlled valve 5 controls, precipitate through Produced Liquid solid particle settling tank 6, liquid after process is through ball relief valve 10, flap valve 11, Produced Liquid advanced treating tank 13 is pumped into by water pump 12, Produced Liquid advanced treating tank 13 inside forms primarily of metallic fiber sintered felt 14, required filter pressure is provided by the pump pressure controlling water pump 12, and after process, liquid is detected by treatment fluid flow and coal powder density indicating gage 15.
When treatment fluid flow and coal powder density indicating gage 15 survey coal powder density value and Produced Liquid flow and coal powder density indicating gage 4 survey coal powder density value ratio be less than or equal to 5% time, after process, clear liquid enters reinjected water heating tank 17 through entering cold water pipeline 16; Otherwise after process, liquid enters water storage conditioning tank 32 by Produced Liquid reprocessing circulation line 31, then returns and pump into Produced Liquid solid particle settling tank 6 precipitation process, and circular treatment is until Produced Liquid coal powder density is up to standard.
Rear liquid up to standard passes through to enter reinjected water heating tank 17 into cold water pipeline 16, by heating lower circulation line 18, cold water pumps into plate solar collector 19 and heats, hot water is by heating cocycle pipeline 20, through temperature control sleeve pipe 21, run in air valve 22, is back in reinjected water heating tank 17, and heating process also can adopt electric auxiliary heating rod 23 heating as required.Described reinjected water heating tank 17 inner bottom part is provided with the magnesium rod 24 preventing incrustation scale.
Hot water flows into hot water re-injection pipeline 26 by Intelligent water valve 25, and hot water re-injection pipeline 26 is connected with flow velocity and temperature inductor 27, accesses well head through sealing clamp head 28, through evacuation system 2 improvement centralizer 29 used, stretches to coalbed methane reservoir less than 30 by oil jacket annular space.
Circuit in technique and signal transmission line 33, T1, T2, T3 access controller 34, then import computer control terminal 36 into through transmission of wireless signals and treatment system 35.The control software design of computer control terminal 36 by having worked out, carries out operated from a distance through transmission of wireless signals and treatment system 35 pairs of controllers 34, thus realizes the Automated condtrol of technological process.
This technological process is simplified, and can realize centralized control and management, the purified treatment that can precipitate Produced Liquid and filter, and uses clean energy resource solar energy to heat, and meets the needs of extensive efficient, the clean exploitation of China's coal bed gas.After raising wellbore fluid temperature by Automatic-heating reinjected water, more effectively can reduce coal powder density and coal dust is discharged, meanwhile, the permeability of near wellbore zone reservoir can be improved, realize coal-bed-gas production-increase.
Although be described the preferred embodiment of this patent by reference to the accompanying drawings above; but this patent is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under the enlightenment of this patent; do not departing under the ambit that this patent aim and claim protect, can also make a lot of form, these all belong within the protection domain of this patent.
Claims (5)
1. a coal bed gas well Automatic-heating reinjected water yield-increasing technique, is characterized in that: comprise the following steps:
Steps A: Produced Liquid is precipitated and filtration treatment, precipitation and filtration treatment carry out one or many, the solid particle of removing more than 95%;
Step B: after process, clear liquid is by solar energy heating, makes water temperature reach 60 ~ 90 DEG C;
Step C: hot water injects pit shaft by hot water re-injection pipeline, and hot water re-injection pipeline stretches into below coal seam by oil jacket annular space, and former wellbore fluid temperature is raised more than 20 DEG C;
Step D: above 3 step cycle are carried out.
2. coal bed gas well Automatic-heating reinjected water yield-increasing technique according to claim 1, it is characterized in that: in steps A, coal bed gas well Produced Liquid is connected with Produced Liquid flow and coal powder density indicating gage by Produced Liquid pipeline, and controlled valve controls, and enters Produced Liquid solid particle settling tank and precipitates;
Liquid after Produced Liquid solid particle settling tank precipitation process, through ball relief valve, flap valve, Produced Liquid advanced treating tank is pumped into by water pump, Produced Liquid advanced treating tank inside forms primarily of metallic fiber sintered felt, required filter pressure is provided by the pump pressure controlling water pump, and after process, liquid is detected by treatment fluid flow and coal powder density indicating gage;
When treatment fluid flow and coal powder density indicating gage survey coal powder density value and Produced Liquid flow and coal powder density indicating gage survey coal powder density value ratio be less than or equal to 5% time, after process, clear liquid enters reinjected water heating tank through entering cold water pipeline; Otherwise after process, liquid enters water storage conditioning tank by Produced Liquid reprocessing circulation line, then returns and pump into Produced Liquid solid particle settling tank precipitation process, and circular treatment is until Produced Liquid coal powder density is up to standard.
3. coal bed gas well Automatic-heating reinjected water yield-increasing technique according to claim 1, it is characterized in that: in step B, clear liquid after process enters reinjected water heating tank through entering cold water pipeline, by heating lower circulation line, cold water pumps into plate solar collector heating, and hot water passes through heating cocycle pipeline, through temperature control sleeve pipe, run in air valve, is back in reinjected water heating tank.
4. coal bed gas well Automatic-heating reinjected water yield-increasing technique according to claim 3, is characterized in that: heating process also adopts the heating of electric auxiliary heating rod.
5. coal bed gas well Automatic-heating reinjected water yield-increasing technique according to claim 1, it is characterized in that: in step C, after heating, hot water flows into hot water re-injection pipeline by Intelligent water valve, hot water re-injection pipeline is connected with flow velocity and temperature inductor, through sealing clamp head access well head, through evacuation system improvement centralizer used, stretch to below coalbed methane reservoir by oil jacket annular space.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310421979.5A CN103470236B (en) | 2013-09-16 | 2013-09-16 | Coal bed gas well Automatic-heating reinjected water yield-increasing technique |
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| CN201310421979.5A CN103470236B (en) | 2013-09-16 | 2013-09-16 | Coal bed gas well Automatic-heating reinjected water yield-increasing technique |
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| CN103470236B true CN103470236B (en) | 2016-02-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107152270B (en) * | 2017-07-11 | 2023-04-21 | 山西锦联建设科技有限公司 | Full-automatic reinjection water (additive) system and application method thereof |
| CN107701157A (en) * | 2017-09-30 | 2018-02-16 | 太原理工大学 | A kind of device and method of underground heat injection transformation coal seam physical characteristic |
| CN108843278B (en) * | 2018-07-25 | 2020-05-19 | 辽宁工程技术大学 | Device and method for exploiting low-permeability reservoir coal bed gas through solar hot air heating |
| CN109403924A (en) * | 2018-09-29 | 2019-03-01 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of single coal bed gas well injection hot water driving gang of wells method for increasing |
Citations (5)
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|---|---|---|---|---|
| US4083402A (en) * | 1975-04-02 | 1978-04-11 | Roza Ivanovna Antonova | Method of underground gasification of a coal bed |
| CN1508387A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN1508389A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN101418679A (en) * | 2008-11-12 | 2009-04-29 | 太原理工大学 | Method for pumping coalbed gas by heating coal bed |
| CN102635341A (en) * | 2012-04-13 | 2012-08-15 | 中联煤层气有限责任公司 | Circular and automatic water replenishing and drainage and production equipment for coal-bed gas well |
-
2013
- 2013-09-16 CN CN201310421979.5A patent/CN103470236B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083402A (en) * | 1975-04-02 | 1978-04-11 | Roza Ivanovna Antonova | Method of underground gasification of a coal bed |
| CN1508387A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN1508389A (en) * | 2002-12-13 | 2004-06-30 | 石油大学(北京) | Thermal recovery method for coal seam gas |
| CN101418679A (en) * | 2008-11-12 | 2009-04-29 | 太原理工大学 | Method for pumping coalbed gas by heating coal bed |
| CN102635341A (en) * | 2012-04-13 | 2012-08-15 | 中联煤层气有限责任公司 | Circular and automatic water replenishing and drainage and production equipment for coal-bed gas well |
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