CN105443097A - Shale gas yield increasing device - Google Patents
Shale gas yield increasing device Download PDFInfo
- Publication number
- CN105443097A CN105443097A CN201610009887.XA CN201610009887A CN105443097A CN 105443097 A CN105443097 A CN 105443097A CN 201610009887 A CN201610009887 A CN 201610009887A CN 105443097 A CN105443097 A CN 105443097A
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- China
- Prior art keywords
- shale gas
- gas
- steam
- increasing device
- shale
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Abstract
The invention discloses a shale gas yield increasing device, comprising a steam generator, a steam conveying main pipe communicated with the steam generator and yield increasing components; each of the yield increasing components comprises an outer pipe arranged in a shale gas well and relatively fixed with the same, an inner pipe sleeved by the outer pipe, a conveying pump and a first control valve; parts, corresponding to a shale layer, of the inner pipe and the outer pipe are both provided with a steam inlet/outlet hole; the outlet of the conveying pump is communicated with the inner pipe and the inlet of the conveying pump is communicated with the steam conveying main pipe by a steam conveying branch pipe; the first control valve is used for controlling the on and off of the steam conveying branch pipe and the steam conveying main pipe. Hot steam can be injected into multiple shale gas wells by the steam conveying main pipe and multiple groups of yield increasing components, the yield increasing component at each shale gas well is controlled by the first control valve, and the whole device can supply heat to the shale gas wells by only one steam generator, thus greatly saving the cost of the device; the shale gas yield increasing device is simple in structure, small in investment and good in shale gas yield increasing effect.
Description
Technical field
The present invention relates to shale gas production technique, be specifically related to shale gas increasing device.
Background technology
Shale gas composes the natural gas be stored in dark-coloured mud shale layer or high-carbon mud shale layer, it can be created on each stages various of organic origin, a natural gas part is present in crack, rammell, rammell hole and other reservoir space with free phase (about 50%), and another part is present in kerogen, clay particle and clay pore surface with adsorbed state (about 50%).Shale gas is the resource of preciousness, the energy of high-quality and industrial chemicals, and what can be used as conventional gas takes over the energy or the supplementary energy.
Himself desorb of mainly dependence of existing shale gas exploitation, after gas production a period of time, the output of shale gas sharply reduces, and the effect of shale gas exploitation is undesirable, yields poorly, output is unstable, can not reach commercial development standard.Shale gas exploits the low reason of gas production mainly: compared with conventional gas, the storing mode of shale gas is to be adsorbed as master, reservoir energy low (pressure is low), poor permeability, the output process of shale gas is first desorb, then seepage flow in pore media.The gas production only relying on the more difficult acquisition of self desorb very high and recovery ratio, must find and study the new method improving exploitation rate (or daily output tolerance) and recovery ratio.
In order to improve the recovery ratio of shale gas, when shale gas opens output lower than commercial development standard (individual well 1000 meters 3/ day), well stimulation can be taked.Existing well stimulation mainly adopts fracturing to carry out reservoir reconstruction.Its principle is, by ground pump truck, fracturing fluid is pumped into shaft bottom, and high pressure fracture liquid pressure break in shale gas reservoir goes out one or more crack, thus provides more passage for the seepage flow of shale gas.Although this method adds seepage channel, the shale gas of part desorb is flowed out, fundamentally do not accelerate the desorb of ADSORPTION STATE shale gas, effect of increasing production is limited.The equipment investment of this shale gas volume increase is large, operating cost is high, also limit its extensive use.
In addition, also have a kind of method for increasing for shale gas: CO2 absorption method, the method utilizes CO2 to have the adsorptivity higher than methane (CH4), injects CO2 to rammell, squeezes methane or change its characterization of adsorption.This method also must suitably step-down, CH4 desorb in pressure reduction, and CO2 has strong adsorptivity and occupies the position of CH4, thus makes CH4 keep free state.Detailed process is: producing well drives a well step-down, and Injection Well injects CO2, and after step-down, CH4 desorb is free state, and CO2 adsorbs.Then increase injection pressure, CH4 is along rammell flow of pore from gas well output.After producing a period of time according to the method described above, step-down again, carries out injection and the output of next circulation.But because pressure reduction is at producing well, and CO2 injects at Injection Well, occur when causing the competition of CH4 and CO2 possibility different, in addition due to boosting and the iterative cycles of step-down, shorten the effective time that shale gas is produced, therefore can not improve daily output tolerance very significantly.And this method for increasing equipment is complicated, preparation cost is high, also makes it only stay in the laboratory research stage.
In sum, the investment of prior art shale gas increasing device is large, and operation cost is high.
Summary of the invention
The present invention is directed to the problems referred to above, propose a kind of shale gas increasing device.Solve the investment of prior art shale gas increasing device large, the problem that operation cost is high.
The technical scheme that the present invention takes is as follows:
A kind of shale gas increasing device, comprises steam generator, vapor transport house steward with the outlet of steam generator, and many group volume increase assemblies; Each volume increase assembly includes:
Outer tube, is arranged in shale gas well, and relative with the inside wall of shale gas well fixing;
Interior pipe, to be inside enclosed within described outer tube and to stretch in shale gas well, and the inner and outer tubes part corresponding with rammell all has steam access hole;
Delivery pump, outlet is communicated with described interior pipe, and entrance is communicated with described vapor transport house steward by steam Transportation arm;
First control valve, for controlling the break-make of steam Transportation arm and vapor transport house steward.
The principle of shale gas increasing device: shale gas is normally present in rammell pore surface with adsorbed state, its output at least will through desorb, diffusion and seepage flow three processes, and wherein desorption rate and seepage velocity are the principal elements determining aerogenesis speed.By injecting heat energy to rock stratum, shale gas place, increase the free energy of ADSORPTION STATE shale gas (methane), thus improve the speed of methane from desorb the pore surface of rammell; Shale gas expanded by heating accelerates seepage flow flowing simultaneously, thus reaches the object increasing substantially shale gas output, realize the industrialized developing of shale gas.
During the work of shale gas increasing device, vapours is injected by the inside pipe of steam generator, vapours is infiltrated in rammell by steam access hole, realize heat transmission and shale gas institute rammell temperature is raised, make the desorb rapidly of the shale gas (methane) in ADSORPTION STATE be adsorbed on rammell, become free state.Along with heat transmits to deep, rammell, a large amount of shale gas desorb is free state, the shale gas expanded by heating again of free state.When opening well and making production, the rapid output of shale gas of these free states, enters interior pipe by the steam access hole of outer tube and interior pipe dimly, arrives ground eventually through interior pipe, imports gas pipeline.Shale gas increasing device structure of the present invention is simple, it is little to invest, shale gas effect of increasing production is good; The application can simultaneously for multiple shale gas well injects vapours by arranging vapor transport house steward and organizing volume increase assembly more, and can be controlled the volume increase assembly at each shale gas well place by the first control valve, whole device only needs a steam generator, can be just the heat supply of multiple shale gas well, greatly save the cost of device.
Further, described first control valve is arranged on described steam Transportation arm.
Further, the inside wall of described interior pipe or lateral wall have isolation layer.
Further, the inside wall of described outer tube has isolation layer.
Can heat waste be prevented by arranging isolation layer, can energy conservation, operating efficiency is provided.
Further, also comprise source of the gas, and the insulated gas to be communicated with source of the gas transports house steward, be heat-insulation chamber between the lateral wall of described interior pipe and the inside wall of outer tube, described heat-insulation chamber is transported house steward with described insulated gas be communicated with by insulated gas transport arm, and shale gas increasing device also comprises and transports for controlling insulated gas the second control valve that arm and described insulated gas transport house steward's break-make.
Delivered heat is gone out by the vapours that can slow down in interior pipe by source of the gas being passed into heat-insulation chamber, thus can provide the heat waste of vapours, can energy conservation, operating efficiency is provided.
Further, described second control valve is arranged on insulated gas transport arm.
Further, described source of the gas is noble gas source or Nitrogen source gases.
Further, the sidewall of described interior pipe has some shading rings, and described shading ring is positioned at the top of steam access hole, and closes on described steam access hole.
Can prevent from discharging from interior pipe steam access hole vapours out from heat-insulation chamber by arranging shading ring, the design of shading ring effectively can ensure the reliably working of vapours, the working effect of assurance device.
Further, described shading ring has multiple, and each shading ring is spaced apart.
The design of multiple shading ring can increase the reliability of isolation
Further, the bottom of described interior pipe has centralizer.
The invention has the beneficial effects as follows: can simultaneously for multiple shale gas well injects vapours by arranging vapor transport house steward and organizing volume increase assembly more, and can be controlled the volume increase assembly at each shale gas well place by the first control valve, whole device only needs a steam generator, can be just the heat supply of multiple shale gas well, greatly save the cost of device; Shale gas increasing device structure is simple, it is little to invest, shale gas effect of increasing production is good.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of shale gas increasing device of the present invention;
Schematic diagram when Fig. 2 is shale gas increasing device of the present invention injection steam;
Schematic diagram when Fig. 3 is shale gas increasing device opening well and making production of the present invention.
In figure, each Reference numeral is:
1, steam generator, the 2, first control valve, 3, vapor transport house steward, 4, delivery pump, 5, interior pipe, the 6, second control valve, 7, source of the gas, 8, insulated gas transport house steward, 9, outer tube, 10, heat-insulation chamber, 11, shading ring, 12, centralizer, 13, steam Transportation arm, 14, insulated gas transport arm, 15, volume increase assembly.
Detailed description of the invention:
Below in conjunction with each accompanying drawing, the present invention is described in detail.
As shown in Figure 1, a kind of shale gas increasing device, comprises steam generator 1, vapor transport house steward 3 with the outlet of steam generator, and many group volume increase assemblies 15; Each volume increase assembly 15 includes:
Outer tube 9, is arranged in shale gas well, and relative with the inside wall of shale gas well fixing;
Interior pipe 5, inner sleeve is on outer tube 9 and stretch in shale gas well, and the inner and outer tubes part corresponding with rammell all has steam access hole (not shown in FIG.);
Delivery pump 4, outlet is communicated with interior pipe 5, and entrance is communicated with vapor transport house steward 3 by steam Transportation arm 13;
First control valve 2, for controlling the break-make of steam Transportation arm and vapor transport house steward, first control valve 2 of the present embodiment is arranged on steam Transportation arm 13.
In order to reduce heat waste when practice, isolation layer can be set at the inside wall of interior pipe 5 or lateral wall, isolation layer can be set at the inside wall of outer tube.Can heat waste be prevented by arranging isolation layer, can energy conservation, operating efficiency is provided.
As shown in Figure 1, in the present embodiment, shale gas increasing device also comprises source of the gas 7, and the insulated gas to be communicated with source of the gas transports house steward 8, it is heat-insulation chamber 10 between the lateral wall of interior pipe and the inside wall of outer tube, heat-insulation chamber 10 transports house steward 8 by insulated gas transport arm 14 with insulated gas and is communicated with, shale gas increasing device also comprises for controlling insulated gas transport arm and insulated gas transports the second control valve 6 of house steward's break-make, in the present embodiment, the second control valve 6 is arranged on insulated gas transport arm 14.Delivered heat is gone out by the vapours that can slow down in interior pipe by source of the gas being passed into heat-insulation chamber, thus can provide the heat waste of vapours, can energy conservation, operating efficiency is provided.
In the present embodiment, source of the gas 7 is noble gas source or Nitrogen source gases.
In the present embodiment, the sidewall of interior pipe 5 has some shading rings 11, and shading ring 11 is positioned at the top of steam access hole, and closes on steam access hole.Can prevent from discharging from interior pipe steam access hole vapours out from heat-insulation chamber by arranging shading ring, the design of shading ring effectively can ensure the reliably working of vapours, the working effect of assurance device.
The shading ring of the present embodiment has multiple, and each shading ring is spaced apart.The design of multiple shading ring can increase the reliability of isolation
In the present embodiment, the bottom of interior pipe 5 has centralizer 12.
The principle of the present embodiment shale gas increasing device: shale gas is normally present in rammell pore surface with adsorbed state, its output at least will through desorb, diffusion and seepage flow three processes, and wherein desorption rate and seepage velocity are the principal elements determining aerogenesis speed.By injecting heat energy to rock stratum, shale gas place, increase the free energy of ADSORPTION STATE shale gas (methane), thus improve the speed of methane from desorb the pore surface of rammell; Shale gas expanded by heating accelerates seepage flow flowing simultaneously, thus reaches the object increasing substantially shale gas output, realize the industrialized developing of shale gas.
During the work of shale gas increasing device, vapours is injected by the inside pipe of steam generator, vapours is infiltrated in rammell by steam access hole, realize heat transmission and shale gas institute rammell temperature is raised, make the desorb rapidly of the shale gas (methane) in ADSORPTION STATE be adsorbed on rammell, become free state.Along with heat transmits to deep, rammell, a large amount of shale gas desorb is free state, and the shale gas expanded by heating again of free state, is shown in Fig. 2.When opening well and making production, the rapid output of shale gas of these free states, enters interior pipe by the steam access hole of outer tube and interior pipe dimly, arrives ground eventually through interior pipe, imports gas pipeline, sees Fig. 3.
Shale gas increasing device structure of the present invention is simple, it is little to invest, shale gas effect of increasing production is good; The application can simultaneously for multiple shale gas well injects vapours by arranging vapor transport house steward and organizing volume increase assembly more, and can be controlled the volume increase assembly at each shale gas well place by the first control valve, whole device only needs a steam generator, can be just the heat supply of multiple shale gas well, greatly save the cost of device.
The foregoing is only the preferred embodiments of the present invention; not thereby scope of patent protection of the present invention is namely limited; the equivalent structure transformation that every utilization manual of the present invention and accompanying drawing content are done; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in protection scope of the present invention.
Claims (10)
1. a shale gas increasing device, is characterized in that, comprises steam generator, vapor transport house steward with the outlet of steam generator, and many group volume increase assemblies; Each volume increase assembly includes:
Outer tube, is arranged in shale gas well, and relative with the inside wall of shale gas well fixing;
Interior pipe, to be inside enclosed within described outer tube and to stretch in shale gas well, and the inner and outer tubes part corresponding with rammell all has steam access hole;
Delivery pump, outlet is communicated with described interior pipe, and entrance is communicated with described vapor transport house steward by steam Transportation arm;
First control valve, for controlling the break-make of steam Transportation arm and vapor transport house steward.
2. shale gas increasing device as claimed in claim 1, it is characterized in that, described first control valve is arranged on described steam Transportation arm.
3. shale gas increasing device as claimed in claim 1, it is characterized in that, inside wall or the lateral wall of described interior pipe have isolation layer.
4. shale gas increasing device as claimed in claim 1, it is characterized in that, the inside wall of described outer tube has isolation layer.
5. shale gas increasing device as claimed in claim 1, it is characterized in that, also comprise source of the gas, and the insulated gas to be communicated with source of the gas transports house steward, be heat-insulation chamber between the lateral wall of described interior pipe and the inside wall of outer tube, described heat-insulation chamber is transported house steward with described insulated gas be communicated with by insulated gas transport arm, and shale gas increasing device also comprises and transports for controlling insulated gas the second control valve that arm and described insulated gas transport house steward's break-make.
6. shale gas increasing device as claimed in claim 5, is characterized in that, described second control valve is arranged on insulated gas transport arm.
7. shale gas increasing device as claimed in claim 5, it is characterized in that, described source of the gas is noble gas source or Nitrogen source gases.
8. shale gas increasing device as claimed in claim 5, it is characterized in that, the sidewall of described interior pipe has some shading rings, and described shading ring is positioned at the top of steam access hole, and closes on described steam access hole.
9. shale gas increasing device as claimed in claim 8, it is characterized in that, described shading ring has multiple, and each shading ring is spaced apart.
10. shale gas increasing device as claimed in claim 1, it is characterized in that, the bottom of described interior pipe has centralizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610009887.XA CN105443097A (en) | 2016-01-06 | 2016-01-06 | Shale gas yield increasing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610009887.XA CN105443097A (en) | 2016-01-06 | 2016-01-06 | Shale gas yield increasing device |
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| CN105443097A true CN105443097A (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610009887.XA Pending CN105443097A (en) | 2016-01-06 | 2016-01-06 | Shale gas yield increasing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321040A (en) * | 2016-11-24 | 2017-01-11 | 贵州大学 | Shale gas production increasing device and use method thereof |
| CN108979606A (en) * | 2018-09-30 | 2018-12-11 | 北京科技大学 | A kind of shale gas increasing device |
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| US4322603A (en) * | 1980-03-14 | 1982-03-30 | American Resources Corporation Ltd. | Electrode steam generator system for secondary oil recovery |
| CN1038518A (en) * | 1987-12-24 | 1990-01-03 | 国家建筑材料工业局秦皇岛玻璃研究院 | Automatic stress gauge for glass |
| US20090079255A1 (en) * | 2007-09-21 | 2009-03-26 | Airwars Defense Ip | Harvesting hydrocarbons from coal, shale, peat and landfill seams |
| CN102071915A (en) * | 2010-12-15 | 2011-05-25 | 中国海洋石油总公司 | Annular space continuous nitrogen injection auxiliary heat insulation method for offshore thermal recovery |
| CN202991002U (en) * | 2012-06-29 | 2013-06-12 | 中国石油大学(北京) | Shale gas output increasing equipment |
| CN103221632A (en) * | 2010-09-21 | 2013-07-24 | 帕尔默实验室有限责任公司 | Method of using carbon dioxide in recovery of formation deposits |
| CN103742113A (en) * | 2014-01-06 | 2014-04-23 | 贵州盘江煤层气开发利用有限责任公司 | Infrared yield increasing equipment for use under coal-bed gas well |
| CN205297512U (en) * | 2016-01-06 | 2016-06-08 | 浙江科技学院 | Shale gas raising output device |
-
2016
- 2016-01-06 CN CN201610009887.XA patent/CN105443097A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322603A (en) * | 1980-03-14 | 1982-03-30 | American Resources Corporation Ltd. | Electrode steam generator system for secondary oil recovery |
| CN1038518A (en) * | 1987-12-24 | 1990-01-03 | 国家建筑材料工业局秦皇岛玻璃研究院 | Automatic stress gauge for glass |
| US20090079255A1 (en) * | 2007-09-21 | 2009-03-26 | Airwars Defense Ip | Harvesting hydrocarbons from coal, shale, peat and landfill seams |
| CN103221632A (en) * | 2010-09-21 | 2013-07-24 | 帕尔默实验室有限责任公司 | Method of using carbon dioxide in recovery of formation deposits |
| CN102071915A (en) * | 2010-12-15 | 2011-05-25 | 中国海洋石油总公司 | Annular space continuous nitrogen injection auxiliary heat insulation method for offshore thermal recovery |
| CN202991002U (en) * | 2012-06-29 | 2013-06-12 | 中国石油大学(北京) | Shale gas output increasing equipment |
| CN103742113A (en) * | 2014-01-06 | 2014-04-23 | 贵州盘江煤层气开发利用有限责任公司 | Infrared yield increasing equipment for use under coal-bed gas well |
| CN205297512U (en) * | 2016-01-06 | 2016-06-08 | 浙江科技学院 | Shale gas raising output device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321040A (en) * | 2016-11-24 | 2017-01-11 | 贵州大学 | Shale gas production increasing device and use method thereof |
| CN108979606A (en) * | 2018-09-30 | 2018-12-11 | 北京科技大学 | A kind of shale gas increasing device |
| CN108979606B (en) * | 2018-09-30 | 2023-09-12 | 北京科技大学 | Shale gas yield increasing device |
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