CN107044275A - Utilize deep geothermal resources thermal recovery shale gas method and system - Google Patents
Utilize deep geothermal resources thermal recovery shale gas method and system Download PDFInfo
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- CN107044275A CN107044275A CN201710195765.9A CN201710195765A CN107044275A CN 107044275 A CN107044275 A CN 107044275A CN 201710195765 A CN201710195765 A CN 201710195765A CN 107044275 A CN107044275 A CN 107044275A
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- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 88
- 239000011435 rock Substances 0.000 claims abstract description 57
- 238000005553 drilling Methods 0.000 claims abstract description 18
- 238000003795 desorption Methods 0.000 claims abstract description 15
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000002207 thermal evaporation Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 149
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- 239000003345 natural gas Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims 2
- 238000000605 extraction Methods 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000009467 reduction Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- -1 kerogen Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/30—Geothermal collectors using underground reservoirs for accumulating working fluids or intermediate fluids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Deep geothermal thermal recovery shale gas technology is the present invention relates to the use of, is specifically that one kind utilizes deep geothermal resources thermal recovery shale gas method and system；Shale gas thermal process includes well pattern arrangement, buries well drilling well, installs hot extractor and shale gas thermal recovery.Shale gas hot exploitation system includes the row well pattern positioned at horizontal well both sides, each row well pattern buries well including four mouth structure identicals again, this, which buries well, also includes being provided with perforation on the pipeline section of the sleeve pipe on the pipeline section of the sleeve pipe at shale gas reservoir position and at xeothermic rock stratum position, and the perforation connects the inner chamber of sleeve pipe with shale gas reservoir and xeothermic rock stratum；Set in well is buried built with the gravity assisted heat pipe device by thermal evaporation working medium.The present invention is this have the advantage that due to methods described and structure：Energy consumption is considerably reduced, the desorption of shale gas reservoir adsorbed gas is promoted, improves extraction degree and reduce cost of winning.
Description
Technical field
Deep geothermal thermal recovery shale gas technology is the present invention relates to the use of, especially a kind of reduction energy consumption, promotion absorption
Gas desorption, the utilization deep geothermal resources thermal recovery shale gas method and system for improving extraction degree and reduction cost of winning.
Background technology
Unconventional petroleum resources is a kind of new resources type, main bag shale gas, shale oil, compact sandstone gas, coal bed gas
Deng.Wherein, shale gas is to be born from storage certainly, the natural gas continuously assembled in shale micro/nano level hole.Shale gas is that the U.S. is surveyed
Visit and develop one of earliest and most successful Natural Gas Type.American energy information is affixed one's name to（U.S. Energy Information
Administration, EIA）The report of 2013 year energy outlooks in point out, U.S. domestic gas production it is estimated from
23.0 × 1012 ft3 of 2011 increase to the ft3 of the year two thousand forty 33.1 × 1012, and increasing degree is 44%.Wherein, incremental portion
Shale gas increase of production is mostly come from, estimated 7.8 × 1012 ft3 from 2011 of shale gas annual production rise to the year two thousand forty
16.7 × 1012 ft3.
National shale gas resource investigation shows, the Sichuan Basin, Ordos Basin, Bohai gulf basin, Song-liao basin,
There are the geological conditions that shale gas is contained in Turpan- Hami basin, In Jianghan Basin, Tarim Basin, Junggar Basin etc., it was found that typical case
Local Natural Gas Enrichment in rammell.China's Main Basins and regional shale gas stock number be about 15 × 1012 m3 ~ 30 ×
1012 m3, roughly the same with the m3 of the U.S. 28.3 × 1012, potentiality to be exploited is huge.Due to unconventional petroleum resources reservoir geology knot
Structure is complicated, and the geological exploration and development grasped is theoretical and conventional gas and oil development technique is not fully appropriate for unconventionaloil pool money
Source, although unconventional petroleum resources reserves are very huge at present, its exploitation is in initial period.North America region is by for many years
Research and development practice, important understanding and technology have been formed in terms of shale gas formation mechenism, enrichment condition.
The preservation of gas is different from conventional oil gas reservoir in shale gas reservoir.In shale gas reservoir, the occurrence form of natural gas has
Following three kinds：One is to be adsorbed in the form of adsorbed gas in organic matter and clay particle surface；Two are present in the form of free gas
In Rock Matrix hole and crack；The third is to be present in a small amount of gas dissolved state in the materials such as kerogen, pitch.
Adsorbed gas content accounts for total air content 20% ~ 85% in general shale, therefore increase shale gas desorption rate is to improve page
The key of rock gas yield.Conventional depressurization desorption exploitation shale gas yields poorly, the production cycle is long.In addition, drop in formation pressure has
Certain limitation, a big chunk adsorbed gas can not be desorbed, and reduce the recovery percent of reserves of shale gas.Temperature is influence shale aspiration
An attached key factor, temperature often raises 1 DEG C, shale gas adsorbance reduction about 1.5%.Improved by raising formation temperature
Shale gas desorption rate is an important channel for improving shale gas yield.Conventional mode of heating needs heated fluid injection to improve
Formation temperature, but be due to the extremely low permeability of shale, the injection of hot fluid is extremely difficult.
Current shale gas exploitation can use straight well and horizontal well, but based on horizontal well.Shale reservoir needs fracturing reform
Commercial quantities could be obtained, the stimulation technology such as multi-stage water power pressure break, refracturing is current lifting shale gas well yield
Major technique.
In summary, the shale gas thermal process of prior art and the technical problem of device presence are：Recovery percent of reserves is low, needs
Heated fluid injection is wanted, hot fluid needs external auxiliary to heat, high energy consumption is limited by drop in formation pressure, greatly adsorbed
Gas can not be desorbed, cost of winning height etc..
The content of the invention
Desorbed it is an object of the invention to provide one kind using deep geothermal reduction energy consumption, promotion adsorbed gas, improve and adopt
The utilization deep geothermal resources thermal recovery shale gas method of out-degree and reduction cost of winning.
The technical scheme used to achieve the above object is such, i.e., one kind utilizes deep geothermal resources thermal recovery shale
Gas method, comprises the following steps：
The first step, well pattern arrangement, utilize drilling equipment in producing region, design the track of well according to production and production is set
The trajectory parameters for counting well form horizontal well using Geosteering Drilling Technology drilling well, and tripping in sleeve pipe and water is injected in horizontal well
Mud is cemented the well, afterwards in net horizontal section perforation completion, finally carries out multistage fracturing at the net horizontal section of horizontal well；Using row pattern
Well pattern, the row well pattern is divided into two rows, and the two rows well pattern is located at the both sides of horizontal well respectively, often arranges four mouthfuls of well pattern arrangement and buries
Well, all structures for burying well are identical；
Second step, well drilling well is buried, be drilled through rock stratum, shale gas reservoir successively using drilling equipment and positioned at shale gas reservoir
The xeothermic rock stratum of lower section, tripping in sleeve pipe and injects cement and is cemented the well, respectively in shale gas reservoir and xeothermic rock stratum in the borehole
Well section carry out perforation completion, perforation at shale gas reservoir well section position connects the inner chamber of shale gas reservoir and sleeve pipe
Logical, the perforation at xeothermic rock stratum well section position connects xeothermic rock stratum with the inner chamber of sleeve pipe；
3rd step, install hot extractor, by inner chamber equipped with working medium the tripping in of gravity assisted heat pipe device to cannula cavity bottom, this is heavy
Power heat-pipe apparatus is located at cannula cavity fragment position between casing shoe and shale gas reservoir top, by gravity assisted heat pipe device
Top be fixed on oil pipe bottom, between gravity assisted heat pipe device and shale gas reservoir at position cannula cavity section and/or gravity
The gravity assisted heat pipe device outer wall of cannula cavity section between heat-pipe apparatus and xeothermic rock stratum at position is set with packer；The oil
The top of pipe is connected after stretching out the top of sleeve pipe with GCU, control oil pipe rountrip, by under gravity assisted heat pipe device
Put to purpose of horizon；
High temperature is transmitted under the bottom of gravity assisted heat pipe device, heating gravity assisted heat pipe device by the 4th step, shale gas thermal recovery, xeothermic rock stratum
End, the working medium heat absorption of gravity assisted heat pipe device intracavity bottom is changed into gaseous state from liquid, and gaseous working medium is risen in gravity assisted heat pipe device
Liquefaction forms liquid phase after top of chamber release heat and the inwall along the gravity assisted heat pipe device inner chamber flows downward and returns to gravity heat
Pipe device intracavity bottom, to absorb heat again, carries out circulating phase-change next time, while heat is passed up to positioned at shale gas
In cannula cavity section at reservoir position, and shale gas reservoir is heated, do not arrange the every mouth in well pattern and bury well and all enter
The above-mentioned circulation of row, so that the shale gas reservoir temperature rise in well pattern region, makes the desorption of shale gas reservoir produce natural gas,
With increasing for stripping gas, the pressure in shale gas reservoir increases, and shale gas reservoir is passed through after pressure increases to some value
Pressure-break at horizontal well position enters oil pipe, realizes the thermal recovery of shale gas.
The present invention is this have the advantage that due to the above method：Geophysical exploration shows, due to geothermal gradient or ground
The activity of magma at layer depth, HTHP water layer is generally developed in the bottom of shale gas reservoir or xeothermic rock stratum equitemperature is higher
Reservoir.This method efficiently utilizes the xeothermic rock stratum in bottom as origin of heat, considerably reduces energy consumption, promotes shale
Gas reservoir adsorbed gas desorbs, improves extraction degree and reduce cost of winning.
It is yet another object of the invention to provide one kind reduction energy consumption, adsorbed gas desorption, raising extraction degree and reduction is promoted to open
Adopt the utilization deep geothermal resources thermal recovery shale gas system of cost.
The technical scheme used to achieve the above object is as follows, i.e., a kind of to utilize deep geothermal resources thermal recovery shale gas system
System, including the row well pattern positioned at horizontal well both sides, each row well pattern bury well including four mouth structure identicals again；
The well that buries also sequentially passes through the drilling penetrated after overlying rock, shale gas reservoir in xeothermic rock stratum including bottom, Gu
Fixed sleeve pipe in the borehole；The pipe of sleeve pipe on the pipeline section of sleeve pipe at shale gas reservoir position and xeothermic rock stratum position
Perforation is provided with section, the perforation connects the inner chamber of sleeve pipe with shale gas reservoir and xeothermic rock stratum；
The inner chamber pipeline section of sleeve pipe at the inner chamber pipeline section of sleeve pipe at shale gas reservoir position and/or at xeothermic rock stratum position
Place is fixed with packer, and the bottom of oil pipe is fixed on through the top of the gravity assisted heat pipe device of packer, and the oil pipe passes sleeve pipe
Top port；The gravity assisted heat pipe device is located at shale gas built with by the top of thermal evaporation working medium, gravity assisted heat pipe device
At the inner chamber pipeline section of sleeve pipe at reservoir position, the bottom of gravity assisted heat pipe device is located at the inner chamber of the sleeve pipe at xeothermic rock stratum position
At pipeline section.
The present invention is this have the advantage that due to said structure：The xeothermic rock stratum in bottom is efficiently utilized as heat to come
Source, makes full use of natural energy to considerably reduce energy consumption, promote shale gas reservoir adsorbed gas desorption, improve extraction degree and
Reduce cost of winning.
Brief description of the drawings
The nonlimiting examples that the present invention can be provided by accompanying drawing are further illustrated.
Fig. 1 is structural representation of the invention.
Fig. 2 is the structural representation at gravity assisted heat pipe unit of the present invention.
Fig. 3 is that hot exploitation system row well pattern of the present invention arranges schematic diagram.
Fig. 4 is stratigraphic section schematic diagram of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
One kind utilizes deep geothermal resources thermal recovery shale gas method, comprises the following steps：
The first step, well pattern arrangement, utilize drilling equipment in producing region, design the track of well according to production and production is set
The trajectory parameters for counting well form horizontal well using Geosteering Drilling Technology drilling well, and tripping in sleeve pipe and water is injected in horizontal well
Mud is cemented the well, afterwards in net horizontal section perforation completion, finally carries out multistage fracturing at the net horizontal section of horizontal well；Using row pattern
Well pattern, the row well pattern is divided into two rows, and the two rows well pattern is located at the both sides of horizontal well respectively, often arranges four mouthfuls of well pattern arrangement and buries
Well, all structures for burying well are identical；
Second step, well drilling well is buried, be drilled through rock stratum, shale gas reservoir successively using drilling equipment and positioned at shale gas reservoir
The xeothermic rock stratum of lower section, tripping in sleeve pipe and injects cement and is cemented the well, respectively in shale gas reservoir and xeothermic rock stratum in the borehole
Well section carry out perforation completion, perforation at shale gas reservoir well section position connects the inner chamber of shale gas reservoir and sleeve pipe
Logical, the perforation at xeothermic rock stratum well section position connects xeothermic rock stratum with the inner chamber of sleeve pipe；
3rd step, install hot extractor, by inner chamber equipped with working medium the tripping in of gravity assisted heat pipe device to cannula cavity bottom, this is heavy
Power heat-pipe apparatus is located at cannula cavity fragment position between casing shoe and shale gas reservoir top, by gravity assisted heat pipe device
Top be fixed on oil pipe bottom, between gravity assisted heat pipe device and shale gas reservoir at position cannula cavity section and/or gravity
The gravity assisted heat pipe device outer wall of cannula cavity section between heat-pipe apparatus and xeothermic rock stratum at position is set with packer；The oil
The top of pipe is connected after stretching out the top of sleeve pipe with GCU, control oil pipe rountrip, by under gravity assisted heat pipe device
Put to purpose of horizon；
High temperature is transmitted under the bottom of gravity assisted heat pipe device, heating gravity assisted heat pipe device by the 4th step, shale gas thermal recovery, xeothermic rock stratum
End, the working medium heat absorption of gravity assisted heat pipe device intracavity bottom is changed into gaseous state from liquid, and gaseous working medium is risen in gravity assisted heat pipe device
Liquefaction forms liquid phase after top of chamber release heat and the inwall along the gravity assisted heat pipe device inner chamber flows downward and returns to gravity heat
Pipe device intracavity bottom, to absorb heat again, carries out circulating phase-change next time, while heat is passed up to positioned at shale gas
In cannula cavity section at reservoir position, and shale gas reservoir is heated, do not arrange the every mouth in well pattern and bury well and all enter
The above-mentioned circulation of row, so that the shale gas reservoir temperature rise in well pattern region, makes the desorption of shale gas reservoir produce natural gas,
With increasing for stripping gas, the pressure in shale gas reservoir increases, and shale gas reservoir is passed through after pressure increases to some value
Pressure-break at horizontal well position enters oil pipe, realizes the thermal recovery of shale gas.In this embodiment, by using xeothermic rock stratum
Heat, allow working medium gravity assisted heat pipe device bottom heat absorption and in the inner chamber of gravity assisted heat pipe device gasify rise, by heat
The inner chamber top for bringing gravity assisted heat pipe device into carries out heat release, realizes that xeothermic rock stratum is heated to shale gas reservoir, makes shale gas abundant
Desorbed from shale gas reservoir, no external heat is added, and reduces energy consumption, promote the desorption of shale gas reservoir adsorbed gas, improve
Extraction degree and reduce cost of winning.
Further to improve extraction degree, make full use of in the heat of xeothermic rock stratum, above-described embodiment, preferably：The work
Matter uses the one or more in water, methanol, acetone；When using several in the working medium, just have in gravity assisted heat pipe device
The inner chamber of corresponding several separate closings, the inner chamber of several separate closings is arranged from top to bottom；Each independence
It is secondary successively from the bottom up during the inner chamber work of closing to form condensation inner chamber section, adiabatic inner chamber section and evaporation inner chamber section.
Further to improve extraction degree, make full use of in the heat of xeothermic rock stratum, above-described embodiment, preferably：It is described
The boiling point of the built-in working medium of correspondence is gradually reduced from the bottom up in the inner chamber of several separate closings.
To ensure in the steadiness of individual well, above-described embodiment, preferably：The injection cement, which carries out well cementation, to be covered in well
Cementing well in annular space portion between pipe outer wall and the borehole wall.
Referring to accompanying drawing 1 to 4, one kind utilizes deep geothermal resources thermal recovery shale gas system, including positioned at the both sides of horizontal well 28
Row well pattern 29, each row well pattern 29 buries well 18 including four mouth structure identicals again；
The well 18 that buries also sequentially passes through the brill penetrated after overlying rock 1, shale gas reservoir 5 in xeothermic rock stratum 9 including bottom
Hole, fixed sleeve pipe 4 in the borehole；At on the pipeline section of sleeve pipe 4 at the position of the shale gas reservoir 5 and xeothermic position of rock stratum 9
Sleeve pipe 4 pipeline section on be provided with perforation 11, the perforation 11 connects the inner chamber of sleeve pipe 4 with shale gas reservoir 5 and xeothermic rock stratum 9
It is logical；
The inner chamber of sleeve pipe 4 at the inner chamber pipeline section of sleeve pipe 4 at the position of shale gas reservoir 5 and/or at the position of xeothermic rock stratum 9
Packer 10 is fixed with pipeline section, the bottom of oil pipe 2, the oil are fixed on through the top of the gravity assisted heat pipe device 6 of packer 10
Pipe 2 passes the top port of sleeve pipe 4；The gravity assisted heat pipe device 6 is built with by thermal evaporation working medium 14, gravity assisted heat pipe device 6
Top be located at the inner chamber pipeline section of the sleeve pipe 4 at the position of shale gas reservoir 5, the bottom of gravity assisted heat pipe device 6 is located at hot dry rock
At the inner chamber pipeline section of sleeve pipe 4 at 9 position of layer.In this embodiment, by using the heat of xeothermic rock stratum, working medium is allowed in gravity
The bottom heat absorption and rising of gasifying in the inner chamber of gravity assisted heat pipe device of heat-pipe apparatus, heat is brought into gravity assisted heat pipe device
Chamber top carries out heat release, realizes that xeothermic rock stratum is heated to shale gas reservoir, allows shale gas fully to be desorbed from shale gas reservoir, nothing
External heat is added, and reduces energy consumption, is promoted the desorption of shale gas reservoir adsorbed gas, is improved extraction degree and reduce and exploit into
This.
Further to improve extraction degree, the heat of xeothermic rock stratum is made full use of, the making of reduction gravity assisted heat pipe device 6 is difficult
In degree, above-described embodiment, preferably：The gravity assisted heat pipe device 6 includes at least two sets gravity assisted heat pipe units 7, passes through connector 8
The head and the tail of adjacent two sets of gravity assisted heat pipe units 7 are fixed as one；
The two ends of the heat conducting pipe including heat conducting pipe, are sealed again, make heat conduction by the gravity assisted heat pipe unit 7 by seal plug 12
The inner chamber of pipe forms gravity assisted heat pipe closing chamber 13, and working medium 14 is located at the bottom of gravity assisted heat pipe closing chamber 13, the gravity assisted heat pipe envelope
Closed chamber 13 is from top to bottom divided into condensation segment 15, adiabatic section 16 and evaporator section 17.
Further to improve extraction degree, make full use of in the heat of xeothermic rock stratum, above-described embodiment, preferably：Gravity
When heat pipe unit 7 is many set, the boiling of working medium in the gravity assisted heat pipe closing chamber 13 of each gravity assisted heat pipe unit 7 is sequentially located at from the bottom to top
Point is gradually reduced, and the boiling point of working medium is identical in the gravity assisted heat pipe closing chamber 13 of same gravity assisted heat pipe unit 7.
In order to reach fully heating shale gas reservoir and the purpose for the quantity for improving stripping gas, hot exploitation system uses row pattern well
Net, buries well 18 by eight mouthfuls as shown in Figure 3 and constitutes, a wide range of heating shale gas reservoir 5, makes heat transfer to the water of horizontal well 28
Around horizontal well section 26, formation absorption thermal temperature is raised in net horizontal section 26 and its certain limit, makes the desorption production of shale gas reservoir 5
Raw natural gas, with increasing for stripping gas, the pressure in shale gas reservoir increases, by page after pressure increases to some value
27 enter oil pipe 2 at rock gas reservoir horizontal well net horizontal section pressure-break, realize the exploitation of shale gas.
Fig. 4 is stratigraphic section schematic diagram, does not account for overlying rock, and hatching is A-A in Fig. 3.Eight mouthfuls are buried in well 18
Gravity assisted heat pipe unit 7 in the working medium heat absorption of gravity assisted heat pipe device intracavity bottom gaseous state is changed into from liquid, gaseous working medium rises
To the inner cavity top of gravity assisted heat pipe device 6 discharge heat after re-form liquid phase and along the gravity assisted heat pipe device inner chamber inwall to
Lower flowing returns to gravity assisted heat pipe device intracavity bottom, to absorb heat again, circulating phase-change next time is carried out, while heat is upward
It is delivered in the cannula cavity section at the position of shale gas reservoir 5, and shale gas reservoir 5 is heated, every mouth is buried
The heat that well is diffused out is transmitted in shale gas reservoir 5, so that the temperature of shale gas reservoir 5 rise in well pattern, shale gas reservoir 5
Desorption produces natural gas；With increasing for stripping gas, the pressure in shale gas reservoir 5 increases, when pressure increases to some value
Oil pipe is entered by the pressure-break 27 at the position of shale gas reservoir-level well net horizontal section 26 afterwards, the exploitation of shale gas is realized.
In above-described embodiment, packer 10 is market products.In accompanying drawing 2, heat conducting pipe outer lower side arrow represents direction of absorbing heat,
The outer upper arrow of heat conducting pipe represents heat release direction；Arrow represents the circulation flow direction of working medium 14 in heat conducting pipe.
Obviously, above-mentioned all embodiments are a part of embodiments of the present invention, rather than whole embodiments.Based on this hair
The bright embodiment, all other embodiment that those skilled in the art are obtained under the premise of creative work is not made,
Belong to the category that the present invention is protected.
In summary, due to the above method and structure, the xeothermic rock stratum in bottom is efficiently utilized as origin of heat, significantly
Degree reduces energy consumption, promotes the desorption of shale gas reservoir adsorbed gas, improves extraction degree and reduce cost of winning.
Claims (7)
1. one kind utilizes deep geothermal resources thermal recovery shale gas method, it is characterised in that；Comprise the following steps：
The first step, well pattern arrangement, utilize drilling equipment in producing region, are utilized according to borehole track and well track parameter
Geosteering Drilling Technology drilling well forms horizontal well, tripping in sleeve pipe and injects cement in horizontal well and is cemented the well, afterwards in water
Horizontal well section perforation completion, finally carries out multistage fracturing at the net horizontal section of horizontal well；Using row well pattern, the row well pattern is divided into
Two rows, the two rows well pattern is located at the both sides of horizontal well respectively, often arranges four mouthfuls of well pattern arrangement and buries well, all structure phases for burying well
Together；
Second step, well drilling well is buried, be drilled through rock stratum, shale gas reservoir successively using drilling equipment and positioned at shale gas reservoir
The xeothermic rock stratum of lower section, tripping in sleeve pipe and injects cement and is cemented the well, respectively in shale gas reservoir and xeothermic rock stratum in the borehole
Well section carry out perforation completion, perforation at shale gas reservoir well section position connects the inner chamber of shale gas reservoir and sleeve pipe
Logical, the perforation at xeothermic rock stratum well section position connects xeothermic rock stratum with the inner chamber of sleeve pipe；
3rd step, install hot extractor, by inner chamber equipped with working medium the tripping in of gravity assisted heat pipe device to cannula cavity bottom, this is heavy
Power heat-pipe apparatus is located at cannula cavity fragment position between casing shoe and shale gas reservoir top, by gravity assisted heat pipe device
Top be fixed on oil pipe bottom, between gravity assisted heat pipe device and shale gas reservoir at position cannula cavity section and/or gravity
The gravity assisted heat pipe device outer wall of cannula cavity section between heat-pipe apparatus and xeothermic rock stratum at position is set with packer；The oil
The top of pipe is connected after stretching out the top of sleeve pipe with GCU, control oil pipe rountrip, by under gravity assisted heat pipe device
Put to purpose of horizon；
High temperature is transmitted under the bottom of gravity assisted heat pipe device, heating gravity assisted heat pipe device by the 4th step, shale gas thermal recovery, xeothermic rock stratum
End, the working medium heat absorption of gravity assisted heat pipe device intracavity bottom is changed into gaseous state from liquid, and gaseous working medium is risen in gravity assisted heat pipe device
Liquefaction forms liquid phase after top of chamber release heat and the inwall along the gravity assisted heat pipe device inner chamber flows downward and returns to gravity heat
Pipe device intracavity bottom, to absorb heat again, carries out circulating phase-change next time, while heat is passed up to positioned at shale gas
In cannula cavity section at reservoir position, and shale gas reservoir is heated, do not arrange the every mouth in well pattern and bury well and all enter
The above-mentioned circulation of row, so that the shale gas reservoir temperature rise in well pattern region, makes the desorption of shale gas reservoir produce natural gas,
With increasing for stripping gas, the pressure in shale gas reservoir increases, and shale gas reservoir is passed through after pressure increases to some value
Pressure-break at horizontal well position enters oil pipe, realizes the thermal recovery of shale gas.
2. utilization deep geothermal resources thermal recovery shale gas method according to claim 1, it is characterised in that：The working medium is adopted
With the one or more in water, methanol, acetone etc.；When using several in the working medium, just have in gravity assisted heat pipe device pair
The inner chamber for the several separate closings answered, the inner chamber of several separate closings is arranged from top to bottom；Each is independently sealed
Condensation inner chamber section, adiabatic inner chamber section and evaporation inner chamber section are sequentially formed during the inner chamber work closed from the bottom up.
3. utilization deep geothermal resources thermal recovery shale gas method according to claim 2, it is characterised in that：Several phases
The boiling point of the corresponding working medium being equipped with gradually is reduced from the bottom up in mutual autonomous closure inner chamber.
4. utilization deep geothermal resources thermal recovery shale gas method according to claim 1, it is characterised in that：The injection water
It is cementing well in annular space portion between well middle sleeve outer wall and the borehole wall that mud, which carries out well cementation,.
5. one kind utilizes deep geothermal resources thermal recovery shale gas system, it is characterised in that：Including positioned at horizontal well（28）Both sides
Row well pattern（29）, each row well pattern（29）Again well is buried including four mouth structure identicals（18）；
It is described to bury well（18）Also overlying rock is sequentially passed through including bottom（1）, shale gas reservoir（5）After penetrate xeothermic rock stratum
（9）In drilling, fixed sleeve pipe in the borehole（4）；Positioned at shale gas reservoir（5）Sleeve pipe at position（4）Pipeline section on and
Xeothermic rock stratum（9）Sleeve pipe at position（4）Pipeline section on be provided with perforation（11）, the perforation（11）By sleeve pipe（4）Inner chamber
With shale gas reservoir（5）With xeothermic rock stratum（9）Connection；
Positioned at shale gas reservoir（5）Sleeve pipe at position（4）Inner chamber pipeline section at and/or xeothermic rock stratum（9）Sleeve pipe at position
（4）Inner chamber pipeline section at be fixed with packer（10）, through packer（10）Gravity assisted heat pipe device（6）Top be fixed on oil
Pipe（2）Bottom, the oil pipe（2）Pass sleeve pipe（4）Top port；The gravity assisted heat pipe device（6）Built with by thermal evaporation
Working medium（14）, gravity assisted heat pipe device（6）Top be located at shale gas reservoir（5）Sleeve pipe at position（4）Inner chamber pipeline section at,
Gravity assisted heat pipe device（6）Bottom be located at xeothermic rock stratum（9）Sleeve pipe at position（4）Inner chamber pipeline section at.
6. utilization deep geothermal resources thermal recovery shale gas system according to claim 5, it is characterised in that：The gravity heat
Pipe device（6）Including at least two sets gravity assisted heat pipe units（7）, pass through connector（8）By adjacent two sets of gravity assisted heat pipe units（7）'s
Head and the tail fix as one；
The gravity assisted heat pipe unit（7）Include heat conducting pipe again, pass through seal plug（12）The two ends of the heat conducting pipe are sealed, made
The inner chamber of heat conducting pipe forms gravity assisted heat pipe closing chamber（13）, working medium（14）Positioned at gravity assisted heat pipe closing chamber（13）Bottom, it is described
Gravity assisted heat pipe closing chamber（13）From top to bottom it is divided into condensation segment（15）, adiabatic section（16）And evaporator section（17）.
7. utilization deep geothermal resources thermal recovery shale gas system according to claim 6, it is characterised in that：Gravity assisted heat pipe list
Member（7）During for many sets, each gravity assisted heat pipe unit is sequentially located at from the bottom to top（7）Gravity assisted heat pipe closing chamber（13）The boiling of middle working medium
Point is gradually reduced, same gravity assisted heat pipe unit（7）Gravity assisted heat pipe closing chamber（13）The boiling point of middle working medium is identical.
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| CN107816340A (en) * | 2017-09-22 | 2018-03-20 | 中国石油大学(华东) | Utilize the process of high-power ultrasonics conjugate branch horizontal well thermal production shale gas |
| CN108049856A (en) * | 2018-01-30 | 2018-05-18 | 程煦 | A kind of shale gas exploitation system using heat storage technology |
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Application publication date: 20170815 |