CN203161197U - Shale gas production increasing equipment - Google Patents
Shale gas production increasing equipment Download PDFInfo
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- CN203161197U CN203161197U CN 201220317905 CN201220317905U CN203161197U CN 203161197 U CN203161197 U CN 203161197U CN 201220317905 CN201220317905 CN 201220317905 CN 201220317905 U CN201220317905 U CN 201220317905U CN 203161197 U CN203161197 U CN 203161197U
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- shale gas
- microwave generator
- microwave
- increasing apparatus
- rammell
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Abstract
The utility model provides shale gas production increasing equipment. The shale gas production increasing equipment comprises a microwave generator, a power supply, an inner tube, and an outer tube sleeved outside the inner tube and fixed on the inner wall of a shale gas well, wherein the microwave generator is detachably fixed below the inner tube and is electrically connected to the power supply, and microwave emission holes corresponding to the microwave generator are arranged on the outer tube. The shale gas production increasing equipment is simple, reasonable and compact in structure; and by using the gas production increasing equipment, various problems in the conventional shale gas exploitation are solved, the shale gas desorption velocity and the seepage velocity are effectively increased, and further the shale gas yield is improved. The shale gas production increasing equipment provided by the utility model is suitable for shale gas development of straight wells, horizontal wells or multi-branch wells.
Description
Technical field
The utility model relates to the shale gas production technique, relates in particular to a kind of shale gas yield-increasing apparatus.
Background technology
Shale gas is to compose the natural gas that is stored in dark-coloured mud shale layer or the high-carbon mud shale layer, it can be created on various each stages 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 valuable resource, the energy and the industrial chemicals of high-quality, and what can be used as conventional gas takes over the energy or the additional energy.
Existing shale gas exploitation mainly be to rely on himself desorb, after gas production a period of time, the output of shale gas sharply reduces, the effect of shale gas exploitation is undesirable, yields poorly, the output instability, can not reach the commercial development standard.The low reason of shale gas exploitation gas production mainly is: compare with conventional gas, the storing mode of shale gas is to be adsorbed as master, reservoir energy low (pressure is low), poor permeability, and the output process of shale gas is first desorb, then seepage flow in pore media.Only rely on very high gas production and the recovery ratio of the difficult acquisition of self desorb, necessary searching and research improve the new method of exploitation rate (or producing tolerance daily) and recovery ratio.
In order to improve the recovery ratio of shale gas, can yield poorly in commercial development standard (1000 meters of individual wells at the shale air to open
3/ day) time, take well stimulation.Existing well stimulation mainly adopts fracturing to carry out reservoir reconstruction.Its principle is by ground pump truck fracturing fluid to be pumped into the shaft bottom, and high pressure fracturing fluid pressure break in the shale gas reservoir goes out one or more crack, thereby provides more passage for the seepage flow of shale gas.Though this method has increased 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 big, operating cost is high, has also limited its extensive use.
In addition, also has a kind of volume increase method at shale gas: CO
2Absorption method, this method is to utilize CO
2Have than methane (CH
4) high adsorptivity, inject CO to the rammell
2, squeeze methane or change its characterization of adsorption.This method is suitably step-down also, CH in the step-down process
4Desorb, CO
2Have strong adsorptivity and occupy CH
4The position, thereby make CH
4Keep free state.Detailed process is: the producing well step-down that drives a well, and inject well and inject CO
2, CH after the step-down
4Desorb is free state, CO
2Absorption.Increase injection pressure then, CH
4Along the rammell flow of pore from the gas well output.After producing a period of time according to the method described above, step-down again, injection and the output of carrying out next circulation.But because the step-down process is at producing well, and CO
2Be to inject the well injection, causing CH
4With CO
2Competition may not take place simultaneously, because the effective time that shale gas is produced has been shortened in the circulation repeatedly with step-down of boosting, therefore can not improve daily output tolerance very significantly in addition.And this volume increase method equipment complexity, preparation cost is high, also makes it only stay in the laboratory research stage.
To sum up, existing shale gas volume increase method all can't realize the volume increase of shale gas fast and effectively, simultaneously, does not also have shale gas yield-increasing apparatus economically and reasonably.
The utility model content
The purpose of this utility model is, at above-mentioned shale gas development problem, a kind of shale gas yield-increasing apparatus has been proposed, it is simple and reasonable for structure, investment is little, when being used for the shale gas volume increase, can effectively improve shale gas desorption rate and seepage velocity, and then improve shale gas output.
For achieving the above object, the technical solution adopted in the utility model is: a kind of shale gas yield-increasing apparatus, comprise microwave generator, power supply, interior pipe and be set in the pipe outside and be fixed on outer tube on the shale gas well inwall, pipe lower end in described microwave generator detachably is fixed on, and with the power supply Electricity Federation, corresponding with the microwave generator microwave launch hole that is provided with on the described outer tube.Described outer tube upper end is used for fixedly shale gas well inwall, described microwave launch hole is used for making the microwave of microwave generator emission to pass through, heating rammell, shale gas place provides circulation passage also can for the shale gas of resolving in the rammell, and the shale gas of parsing is imported in the interior pipe.
Further, described microwave generator comprises pedestal and two above microwave emitting heads, and described two above microwave emitting heads are distributed on the pedestal, can be around it and the downside launched microwave.Described microwave generator is used for launched microwave heating rammell, shale gas place.
Further, described interior pipe is stainless steel tube or plastic inner lining pipe, as oil pipe.
Further, one section of the close microwave generator of described interior pipe is provided with sieve aperture.
Further, described outer tube is positioned at a section of rammell, shale gas place and is provided with sieve aperture, and described sieve aperture provides more circulation passage for the shale gas of resolving.
Further, the microwave frequency of described microwave generator emission is 1MHZ-10GHZ; Described microwave generator power is 100 kilowatts-800 kilowatts.
Further, the microwave frequency of described microwave generator emission is 2MHZ-5GHZ; Described microwave generator power is 300 kilowatts-500 kilowatts.
Adopt the shale gas volume increase method of above-mentioned shale gas yield-increasing apparatus, may further comprise the steps: (1), carry heat energy to the rammell of shale gas well, and realizes that by ordering about the heat energy of carrying the heat transmission makes rammell temperature rising in the rammell; (2), closed the shale gas well 1-10 days; (3), open the gas production of shale gas well.
Further, realizing the heat transmission and make with the shale gas well is 20-30 ℃ of rammell average temperature rising in 50 meters scopes of center of circle radius.
Further, the described time of closing the shale gas well is 1-2 days, waits for that heat further transmits diffusion.
Shale gas volume increase principle: shale gas normally is present in the rammell pore surface with adsorbed state, and its output will pass through desorb, diffusion and three processes of seepage flow at least, and wherein desorption rate and seepage velocity are the principal elements of decision aerogenesis speed.The utility model shale gas volume increase method by inject heat energy to rock stratum, shale gas place, increases the free energy of ADSORPTION STATE shale gas (methane), thereby improves the speed of methane desorb from the pore surface of rammell; It is mobile that the shale gas expanded by heating accelerates seepage flow simultaneously, thereby reach the purpose that increases substantially shale gas output, realizes the industrialized developing of shale gas.
The job step of the utility model shale gas yield-increasing apparatus: the microwave emitting head by microwave generator namely heats the rammell to the rammell launched microwave of shale gas well, and realize that by ordering about the heat energy of carrying the heat transmission raises shale gas institute rammell temperature in the rammell, make the shale gas that is ADSORPTION STATE (methane) desorb rapidly that is adsorbed on the rammell, become free state.Along with heat transmits to the deep, rammell, a large amount of shale gas desorbs are free state, and the shale gas of free state is expanded by heating again.When opening the production of shale gas well, the rapid output of the shale gas of these free states, thus improve the shale gas well yield significantly.
The utility model shale gas yield-increasing apparatus is to adopt heating using microwave rammell, shale gas place and then improve shale gas output, and the investment of the utility model shale gas yield-increasing apparatus is little, and applying flexible is convenient, is suitable for the test of small-sized gas field or well group.
Description of drawings
Fig. 1 is heating schematic diagram of the present utility model;
Fig. 2 is exploitation schematic diagram of the present utility model;
Fig. 3 is the vertical view of microwave generator among Fig. 1.
The specific embodiment
Embodiment 1
Fig. 1 is the utility model heating schematic diagram; Fig. 2 is the utility model exploitation schematic diagram, and Fig. 3 is the vertical view of microwave generator among Fig. 1.
Present embodiment discloses a kind of shale gas yield-increasing apparatus, as shown in Figure 3 and Figure 4, comprises microwave generator 7, power supply 6, interior pipe 3 and be set in pipe 3 outsides and be fixed on outer tube 5 on the shale gas well inwall.Pipe 3 lower ends in microwave generator 7 detachably is fixed on by bolt, microwave generator 7 is by cable 8 and power supply 6 Electricity Federations; Corresponding with the microwave generator 7 microwave launch hole that is provided with on the outer tube 5.
As shown in Figure 5, the microwave generator 7 that present embodiment adopts comprises that column pedestal and 10,8 microwave emitting heads 10 of 8 microwave emitting heads are distributed on the circumference of column pedestal, make microwave emitting head 10 over against rammell, shale gas place 4.The number of general microwave emitting head 10 need and be decided according to power and the shale gas exploitation of microwave emitting head.
Present embodiment middle external tube 5 is positioned at a section of rammell, shale gas place 4 and is provided with sieve aperture, and the shale gas that can be parsing provides more circulation passage.Outer tube 5 upper ends are used for the fixedly shale gas well borehole wall.
The job step of present embodiment shale gas yield-increasing apparatus: the lower end that microwave generator 7 is fixed on interior pipe 3, carried by interior pipe 3 and to enter in the shale gas well, and place rammell, shale gas place, connect power supply 6, start microwave generator 7 to rammell, shale gas place 4 launched microwaves, microwave passes the microwave launch hole on the outer tube 5, realizes the heat transmission and rammell 4 temperature are raise in rammell 4; When being 20-30 ℃ of rammell average temperature rising in 50 meters scopes of center of circle radius with the shale gas well, close the power supply of microwave generator 7; Closed the shale gas well 1-2 days; Shale gas resolution speed in the heated rammell 4 improves, and expanded by heating, passes through sieve aperture on the outer tube 5 and the sieve aperture of interior pipe 3 successively, in the pipe 3, opens the gas production of shale gas well in shale gas flow into, and flows to ground through interior pipe 3, and imports the shale gas gas line network.
Below describe in detail and adopt the method that the shale gas yield-increasing apparatus need be exploited shale gas in the present embodiment, about 800 meters of rammell, shale gas place buried depth, about 40 ℃ of rammell original temperature.The shale gas well is through after the normal gas production of a period of time, when the individual well daily output is lower than the commercial development standard (1000 meters 3/ day).Adopt above-mentioned shale gas yield-increasing apparatus to continue the exploitation shale gas, specifically may further comprise the steps:
(1), carry heat energy to the rammell 4 of shale gas well, and realizes that by ordering about the heat energy of carrying the heat transmission makes rammell temperature rising in rammell 4; Particularly, microwave generator 7 is placed rammell, shale gas place 4, passing through cable 8 by power supply 6 is microwave generator 7 power supplies, microwave generator 7 launched microwaves heating rammell, shale gas place 4, and making with the shale gas well is that the rammell average temperature raises 30 ℃ in 50 meters scopes of center of circle radius; Microwave frequency is 1MHZ-500MHZ; The power of microwave generator is 1000 kilowatts ~ 5000 kilowatts;
(2), closed the shale gas well 1-2 days;
(3), open the gas production of shale gas well.Because rammell, shale gas place temperature improves, and has accelerated the desorb of shale gas, adds the thermal expansion of shale gas, makes shale gas add flow speed and direction shale gas well by the rammell, by outer tube 5 and interior pipe 3, be transported to ground through interior pipe successively, and import gas line network.
Present embodiment applies heat energy by microwave generator 7 is set in rammell, shale gas place to shale gas, make free energy increase, desorption rate raising, the expanded by heating of ADSORPTION STATE shale gas, and the raising of the moisture in evaporation rammell vapor phase stream kinetic force, thereby increase substantially the shale gas well yield.Shale gas individual well daily output improves 6 ~ 10 times.
It should be noted that at last: above each embodiment is not intended to limit only in order to the technical solution of the utility model to be described; Although have been described in detail with reference to the utility model of aforementioned each embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of each embodiment technical scheme of the utility model.
Claims (8)
1. a shale gas yield-increasing apparatus is characterized in that, comprise microwave generator, power supply, interior pipe and be set in the pipe outside and be fixed on outer tube on the shale gas well inwall, pipe lower end in described microwave generator detachably is fixed on, and with the power supply Electricity Federation; Corresponding with the microwave generator microwave launch hole that is provided with on the described outer tube.
2. according to the described shale gas yield-increasing apparatus of claim 1, it is characterized in that described microwave generator comprises pedestal and two above microwave emitting heads, described two above microwave emitting heads are distributed on the pedestal.
3. according to the described shale gas yield-increasing apparatus of claim 1, it is characterized in that described interior pipe is stainless steel tube or plastic inner lining pipe.
4. according to the described shale gas yield-increasing apparatus of claim 1, it is characterized in that described interior pipe is oil pipe.
5. according to claim 1 or 3 described shale gas yield-increasing apparatus, it is characterized in that one section of the close microwave generator of described interior pipe is provided with sieve aperture.
6. according to the described shale gas yield-increasing apparatus of claim 1, it is characterized in that described outer tube is positioned at a section of rammell, shale gas place and is provided with sieve aperture.
7. according to the described shale gas yield-increasing apparatus of claim 1, it is characterized in that the microwave frequency of described microwave generator emission is 1MHZ-10GHZ; Described microwave generator power is 100 kilowatts-800 kilowatts.
8. according to the described shale gas yield-increasing apparatus of claim 6, it is characterized in that the microwave frequency of described microwave generator emission is 2MHZ-5GHZ; Described microwave generator power is 300 kilowatts-500 kilowatts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220317905 CN203161197U (en) | 2012-06-29 | 2012-06-29 | Shale gas production increasing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220317905 CN203161197U (en) | 2012-06-29 | 2012-06-29 | Shale gas production increasing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161197U true CN203161197U (en) | 2013-08-28 |
Family
ID=49022389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220317905 Expired - Fee Related CN203161197U (en) | 2012-06-29 | 2012-06-29 | Shale gas production increasing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161197U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747998A (en) * | 2012-06-29 | 2012-10-24 | 中国石油大学(北京) | Shale gas production increasing method and shale gas production increasing equipment |
| CN103790567A (en) * | 2014-01-27 | 2014-05-14 | 中海阳能源集团股份有限公司 | Shale oil-gas separation exploiting system |
| CN108825197A (en) * | 2018-06-19 | 2018-11-16 | 昆明理工大学 | A method of strengthening shale gas recovery ratio |
-
2012
- 2012-06-29 CN CN 201220317905 patent/CN203161197U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747998A (en) * | 2012-06-29 | 2012-10-24 | 中国石油大学(北京) | Shale gas production increasing method and shale gas production increasing equipment |
| CN102747998B (en) * | 2012-06-29 | 2015-11-25 | 中国石油大学(北京) | Shale gas method for increasing and shale gas yield-increasing apparatus |
| CN103790567A (en) * | 2014-01-27 | 2014-05-14 | 中海阳能源集团股份有限公司 | Shale oil-gas separation exploiting system |
| CN103790567B (en) * | 2014-01-27 | 2016-04-06 | 中海阳能源集团股份有限公司 | A kind of shale oil gas separates extraction system |
| CN108825197A (en) * | 2018-06-19 | 2018-11-16 | 昆明理工大学 | A method of strengthening shale gas recovery ratio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20140629 |
|
| EXPY | Termination of patent right or utility model |