CN110005390A - Method for in-situ conversion exploitation of shale oil gas by medium-low maturity shale oil large well spacing - Google Patents
Method for in-situ conversion exploitation of shale oil gas by medium-low maturity shale oil large well spacing Download PDFInfo
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- CN110005390A CN110005390A CN201910231757.4A CN201910231757A CN110005390A CN 110005390 A CN110005390 A CN 110005390A CN 201910231757 A CN201910231757 A CN 201910231757A CN 110005390 A CN110005390 A CN 110005390A
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- 239000003079 shale oil Substances 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 90
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 84
- 238000006243 chemical reaction Methods 0.000 title abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 186
- 239000007924 injection Substances 0.000 claims abstract description 186
- 238000005485 electric heating Methods 0.000 claims abstract description 39
- 238000000197 pyrolysis Methods 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 239000003921 oil Substances 0.000 claims description 43
- 239000002245 particle Substances 0.000 claims description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 239000002356 single layer Substances 0.000 claims description 11
- 239000004079 vitrinite Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 9
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 9
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 238000002513 implantation Methods 0.000 claims description 3
- 238000002310 reflectometry Methods 0.000 claims 3
- 230000036760 body temperature Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 37
- 238000012544 monitoring process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000011084 recovery Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 8
- 238000004227 thermal cracking Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 239000004058 oil shale Substances 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 239000002349 well water Substances 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides a method for in-situ conversion exploitation of shale oil and gas with medium-low maturity shale oil and large well spacing, which comprises the steps of deploying at least 3 horizontal well groups with odd number of wells in a reservoir according to the well spacing of 15-50 m; fracturing a reservoir, namely dividing fractures into three sections at equal intervals from a central injection well to a production well, and respectively injecting different types of proppants into the three sections in three stages; injecting hot gas into the central injection well, electrically heating the hot gas and producing the hot gas from the production well; when the temperature between the central injection well and a line wheel injection well reaches the complete pyrolysis temperature, the central injection well stops electrical heating and injects normal temperature gas into the central injection well; starting electric heating for a line wheel injection well; when the temperature between the first-line injection well and the second-line injection well reaches the complete pyrolysis temperature, the central injection well stops injecting the normal-temperature gas; stopping electric heating of the line wheel injection well, and injecting normal-temperature gas into the line wheel injection well; starting electric heating for the two-wheel injection well; the temperature of the reservoir circulated to the production well and the last wire injection well adjacent to the production well reaches the full pyrolysis temperature.
Description
Technical field
The present invention relates to a kind of methods of middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas, belong to page
Shale oil production technique field.
Background technique
Oil shale is a kind of sedimentary rock containing solid combustible organic matter, and it is female or dry that flammable organic matter is commonly referred to as oil
Junket root, Chang Chengxian taupe brown or black.Under natural conditions, natural oil shale is a kind of permeability and the extremely low shale of porosity
Shale, kerogen preservation in the form of solid in oil shale and combine together.Small stratification inside oil shale is in underground original
Position is completely in closed state.In all fossil fuels, if being calorific value reserves conversion, oil shale is only second to coal and arranges
Second；Worldwide shale mother oilreserves are quite big, are equivalent to if being converted to the female oil of shale up to more than 4,000 hundred million tons
More than 5 times of crude oil recoverable reserves are naturally verified in the world at present, are a kind of potential huge energies, are internationally recognized conventional petroleums
One of important replacement of resource.China's shale oil is resourceful, and resource assessment data are shown, shale oil China be distributed compared with
Extensively, 47 basins of national 20 provinces (city, area) are spread over, gross reserves is about 47,600,000,000 tons of oil equivalents, and 1.5 times often
Petroleum resources amount is advised, the 4th, the world is occupied.
The main mining method of shale oil is divided into ground destructive distillation and the conversion exploitation of underground high-temp in-situ.But ground destructive distillation is only fitted
An ultra shallow layer shale oilreserves for buried depth less than 100 meters, for buried depth be more than 100 meters of shale oil or even buried depth is more than
1000 meters of deep layer shale oil needs to take the conversion exploitation of underground high-temp in-situ.
Currently, the shale oil high-temp in-situ conversion production technique of main body has the downhole electric heating of SHELL to change in situ in the world
Matter technology (ICP), the Electrofrac technology of ExxonMobil, the original position the CCR modification technology of AMSO and CHEVRON
CRUSH technology.Other than the CRUSH technology of CHEVRON is in the desk research stage, excess-three Xiang Jun enters above-mentioned 4 technologies
Field test stage.Well spacing used by above-mentioned technology is mostly just 4-12 meters, intensive wellbore deployment and well-completing process
Cost of investment is high, in 80 dollar/barrel of oil price or less without economic benefit, it is difficult to which large-scale commercial is promoted.
The country has had many patent applications to disclose shale oil temperature converted in-situ production technique, such as Chinese patent application
CN107387052A discloses a kind of shale oil in-situ retorting method, and this method is using a bite horizontal well and is located at well tiptoe company
The mode of logical straight well passes through horizontal well contiguous segmentation pressure break and injects hot mixing hot gas and realizes that the segmentation to shale oil cracks,
But which principle is to be segmented packing and hot high pressure gas soak, is only limitted near wellbore zone 3-5 meters of thermal cracking horizontal well or so
Shale oil, the shale oil reservoir apart from horizontal well compared with far region can not be heated.
Chinese patent application CN1676870A discloses a kind of method of Convective Heating shale oil exploitation oil gas, and this method is adopted
With the method for ground configuration group wells, it is connected to group wells by pressure break, 400-700 DEG C of high-temperature steam and page are passed through in heat injection well
Shale oil generates heat exchange, and heating rock stratum makes its cracking generate shale oil gas, and is carried to earth's surface by the steam or water of low temperature.
Since the invention requires injection well and recovery well in recovery process to carry out interval rotation, hot quilt is largely injected during rotation
The original annotation hot well output for being converted to recovery well, causes heat inefficient cycle；Further, since high temperature shale oil expands, in addition injection
During water vapour, predominant amount is the water-swellable effect of the shale oil of clay mineral, causes crack to re-close, so that pressure
Crack can not play the role of transmitting the channel of hot steam, and a large amount of hot steams float near injection well by under gravity segregation
Shale top of oil horizon, Repeat-heating cap rock, so that cap rock easily generates the risk that hightemperature cracks and cap rock are broken, to cause
Safety accident.
Above-mentioned shale oil recovery method not can solve the two large problems in shale oil high-temp in-situ conversion recovery process:
Wide spacing heat transfer problem and fracturing fracture continuous effective thermal cracking problem.Therefore it provides a kind of novel middle low-maturity page
The technical issues of method of shale oil wide spacing converted in-situ exploitation shale oil gas has become this field urgent need to resolve.
Summary of the invention
In order to solve the above shortcomings and deficiencies, the purpose of the present invention is to provide a kind of middle big wells of low-maturity shale oil
Method away from converted in-situ exploitation shale oil gas.This method provided by the present invention has heated well away from big, shale oil heat transfer excessively
The advantages that high-efficient, is greater than 4 meters of shale oil commercial development suitable for thickness.
In order to achieve the goal above, the present invention provides a kind of middle low-maturity shale oil wide spacing converted in-situs to exploit page
The method of shale oil gas, wherein the method for the middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas includes:
It (1) is 15-50 meters of at least 3 mouthfuls of deployment according to well spacing in the middle low-maturity shale oil reservoir, well number is odd
The horizontal well well group that number and horizontal segment are parallel to each other, wherein the horizontal well positioned at the horizontal well well group center is center injection well,
Two mouthfuls of water horizontal wells positioned at both ends are producing well；
When disposing well number greater than 3 mouthfuls, the well between producing well and center injection well is alternate water injection well；
(2) use the more clusters of multistage contiguous volume pressure break mode pressure break shale oil reservoir, by crack from center injection well to
Producing well is equidistantly divided into three sections, is followed successively by the crack positioned near wellbore zone, middle part crack and distalmost end crack, to three sections of cracks
In a point three-level be injected separately into different types of proppant, establish thermally conductive flow-guiding channel；
(3) hot gas is injected from ground to center injection well, while the center injection well is electrically heated, from producing well
Extraction；
(4) after the reservoir temperature between center injection well and line wheel note well reaches complete pyrolysis temperature, center injection
Well stops electric heating, injects gas at normal temperature in Xiang Zhongxin injection well；One line wheel infuses well and opens electric heating；
(5) after a line wheel, which infuses the reservoir temperature between well and two wires alternate water injection well, reaches complete pyrolysis temperature, center injection
Well stops injection gas at normal temperature；One line wheel infuses well and stops electric heating, injects gas at normal temperature into line wheel note well；Two wires alternate water injection well
Open electric heating；So circulation, until the reservoir temperature between producing well and last line wheel note well adjacent thereto has reached
After full pyrolysis temperature, stop exploitation.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, can using be installed on center injection well and each alternate water injection well horizontal segment high energy resistance heater to its into
Row electric heating.
In the specific embodiment of the invention, which can be for example magnesium oxide mineral insulation heating electricity
Cable, in addition, the high energy resistance heater needs to match with warm pressure monitoring system (such as thermocouple and pressure sensor), with
Monitoring temperature and pressure；The temperature pressure monitoring system also needs to be electrically connected with ground temperature-controlling system simultaneously, the ground temperature-controlling system root
According to the variation for the high energy resistance heater surface temperature that warm pressure monitoring system measures, carry out adjust automatically high energy resistance heater function
Rate.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, it is preferable that power > 1500W/m of high energy resistance heater used in electric heating.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, heat exchange efficiency > 90% between heat and gas caused by electric heating, i.e. underground high energy resistance heater
Heat exchange heat with the gas in the pit shaft of underground, to improve the temperature of gas, the heat exchange efficiency heat-energy transducer of the heat transfer process
Effect > 90%.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, when disposing well number greater than 3 mouthfuls, the well between producing well and center injection well is alternate water injection well, wherein this hair
The bright size according to alternate water injection well and center injection well spacing, according to alternate water injection well and the sequence of center injection well spacing from small to large,
Alternate water injection well is successively defined as line wheel note well, two wires alternate water injection well ... n line wheel note well, and when a line wheel infuses well, two wires alternate water injection
When well ... n line wheel note well respectively includes Liang Kou and two mouthful of level above well, each horizontal well is identical at a distance from the injection well of center.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, the spacing between each horizontal well can be the same or different (but as same line wheel note well level
Well spacing between well and center injection well is answered identical), such as in the embodiment of the present invention 1, the spacing between each horizontal well is
15m。
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, the complete pyrolysis temperature is the temperature that oil shale kerogen thermal cracking is shale oil gas, can be passed through
Rock pyrolysis instrument is tested to obtain, general 300-400 DEG C of initial pyrolysis temperature, general 450-650 DEG C of complete pyrolysis temperature, for example,
In the specific embodiment of the invention, the complete pyrolysis temperature can be 450 DEG C, 500 DEG C, 550 DEG C, 600 DEG C etc..
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, when disposing well number is 3 mouthfuls, the horizontal well positioned at the horizontal well well group center is center injection well, is located at
Two mouthfuls of water horizontal wells at both ends are producing well, at this time since there is no alternate water injection well, low-maturity shale oil wide spacing in-situ transesterification in this
Melting the method for adopting shale oil gas includes:
Horizontal well uses the contiguous volume pressure break mode pressure break shale oil reservoir of the more clusters of multistage, by crack from center injection well
Equidistantly it is divided into three sections to producing well, is followed successively by the crack positioned near wellbore zone, middle part crack and distalmost end crack, is split to three sections
A point three-level is injected separately into different types of proppant in seam, establishes thermally conductive flow-guiding channel；
Hot gas is injected from ground to center injection well, while the center injection well is electrically heated, is adopted from producing well
Out；
After the reservoir temperature between center injection well and producing well reaches complete pyrolysis temperature, stop exploitation.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (2) of oil gas, it is generally the case that needs successively carry out pressing crack construction to all horizontal wells, i.e., successively to center
Injection well, each line wheel note well and producing well etc. carry out pressing crack construction；
But when carrying out pressing crack construction to center injection well first, if the dummy joint length in discovery center injection well crack
It is 5-10 meters bigger than the distance between center injection well and producing well, pressure break can be stopped, i.e., well and production no longer are infused to each line wheel
Well etc. carries out pressing crack construction；Certainly, it can continue to infuse each line wheel the progress pressing crack construction such as well and producing well at this time.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (2) of oil gas, it is preferable that the dummy joint length in crack obtained by pressure break is 50-200 meters, is spaced between every cluster crack
For 3-5m.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (2) of oil gas, pressure break can be carried out to each horizontal well using oil base fracturing fluid.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (2) of oil gas, it is preferable that into three sections of cracks, a point three-level is injected separately into different types of proppant and includes:
To the implantation silicon carbide particles supports agent of distalmost end crack, high temperature resistant haydite particles proppant is injected in middle part crack, most
Copper/alumina particles proppant is injected in the backward crack positioned near wellbore zone.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (2) of oil gas, it is preferable that into three sections of cracks, a point three-level is injected separately into different types of proppant and includes:
The silicon-carbide particle proppant for being 0.4-1.6mm to distalmost end crack injection partial size, 0.4- is injected in middle part crack
The high temperature resistant haydite particles proppant of 1.6mm, finally to be located near wellbore zone crack injection partial size be 0.4-1.6mm copper/
Alumina particles proppant.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (3) of oil gas, it is preferable that the hot gas includes N2、CO2, air, one or more of hydrocarbon gas
Combination.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (3) of oil gas, it is preferable that the injection rate of the hot gas is 200-2000m3Well water is injected at/unit center
Flat segment length.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (3) of oil gas, it is preferable that temperature > 300 DEG C are injected on the hot gas ground, into the hot gas temperature of oil reservoir
It is 600-650 DEG C.
Wherein, it in the specific embodiment of the invention, is utilized in step (3) and is installed on center injection well shaft bottom (horizontal segment)
Warm pressure monitoring system (such as thermocouple) to center injection well shaft bottom (horizontal segment) carry out thermometric, further according to measured temperature
Variation to control the high energy resistance heater power for being installed on center injection well shaft bottom (horizontal segment), with guarantee by electric heating into
Enter the hot gas temperature of oil reservoir in 600-650 DEG C of range.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (4) of oil gas, judge that center injection well and a line wheel are infused between well by infusing well shaft bottom thermometric to a line wheel
Whether the temperature of reservoir reaches complete pyrolysis temperature.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (4) of oil gas, it is preferable that the complete pyrolysis temperature is 450-650 DEG C.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (5) of oil gas, judge that n-1 line wheel infuses well and n line wheel is infused and stored up between well by infusing well shaft bottom thermometric to n line wheel
Whether the temperature of layer reaches complete pyrolysis temperature, wherein n is the integer more than or equal to 2.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (5) of oil gas, the simulator of the existing routine business in this field can be used, as CMG-STARS passes through tracking
Numerical simulation result judges whether the reservoir temperature between producing well and last line wheel note well adjacent thereto reaches complete heat
Solve temperature.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method and step (5) of oil gas, it is preferable that the complete pyrolysis temperature is 450-650 DEG C.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, it is preferable that the injection rate of the gas at normal temperature is 50-100m3/ unit center injection well or each line wheel
Infuse the horizontal section length of well.
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, it is preferable that the gas at normal temperature includes N2、CO2, air, one or more of hydrocarbon gas combination.
Specific embodiment according to the present invention, it is preferable that low-maturity shale oil wide spacing converted in-situ exploits page in this
The method of shale oil gas further include:
By the operation that gained extraction gas is reheated after separation and is recycled into shale oil reservoir in step (3).
Specific embodiment according to the present invention exploits shale in the middle low-maturity shale oil wide spacing converted in-situ
In the method for oil gas, it is preferable that the single layer effective thickness of the middle low-maturity shale oil is greater than 4 meters, total content of organic carbon
(TOC, %) > 6%, reflectance of vitrinite (RO, %) are between 0.5-1.0%.
The method of middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas provided by the present invention have with
Lower technical effect:
(1) portion's well by the way of wide spacing horizontal well areal well pattern, spacing is 15- between the horizontal segment of adjacent level well
50 meters, overcome the dense well spacing problem of current all shale oil in-situ retortings；
(2) the extraordinary fracturing sand feeding method being effectively connected to using thermal field under wide spacing passes through three-level special type fracturing sand feeding
To realize.It specifically realizes as follows: crack being equidistantly divided into three sections from injection well to producing well, is followed successively by positioned at nearly well
Crack, middle part crack and the distalmost end crack in area；To the implantation silicon carbide particles supports agent of distalmost end crack, can use at this time
The splendid heat absorption capacity of silicon carbide absorbs hot gas amount of residual heat, and the heat for reducing output gas is taken out of；It is injected to middle part crack
High temperature resistant haydite particles proppant, can play supporting crack flow-guiding channel, and the crack under high temperature is avoided to be re-closing off, and promote
The effect of gas flowing；Copper/alumina particles proppant finally is injected to the crack for being located near wellbore zone, utilizes copper/alumina particles pole
The heat of hot gas can be quickly transmitted to reservoir deep by good heat transfer property, avoid near wellbore zone Repeat-heating, and high-intensitive gold
Belong to the closing for supporting particle that can also obviously inhibit hightemperature cracks.
Therefore, this method collection " fast endothermic near high-intensitive support+producing well in the middle part of near wellbore zone efficient heat transfer+oil reservoir "
It is integrated, efficient heat transfer may be implemented.
(3) using the strategy along the producing well rotation gas injection step by step outward of center injection well, complete pyrolysis zone gas at normal temperature
It exchanges heat and continues to drive to producing well, and stop continuation gas injection after temperature decline, the high temperature heat for the complete pyrolysis zone that effectively swaps out,
Heat utilization rate is improved, and displaces the pyrolysis shale oil gas for remaining in the region, further increases recovery ratio.
In conclusion the wide spacing that this method provided by the present invention can effectively solve the exploitation of shale oil converted in-situ passes
Heat problem and fracturing fracture continuous effective thermal cracking problem, may be implemented the effective exploitation of wide spacing shale oil reservoir, exploitation
In the process, shale oil kerogen thermal cracking rate reaches 90% or more, and recovery ratio reaches 85% or more.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is that low-maturity shale oil wide spacing converted in-situ exploits page in this provided in 1-3 of the embodiment of the present invention
Well net deployment schematic diagram in the method for shale oil gas.
Fig. 2 a is that low-maturity shale oil wide spacing converted in-situ exploits shale oil in this provided by the embodiment of the present invention 1
The only fracture design schematic diagram of center injection well pressure break in the method for gas.
Fig. 2 b is that low-maturity shale oil wide spacing converted in-situ exploits shale oil in this provided by the embodiment of the present invention 1
The only specific schematic diagram of the fracture design of center injection well pressure break in the method for gas.
Fig. 2 c is low-maturity shale oil wide spacing converted in-situ exploitation in this provided in the embodiment of the present invention 2 or 3
The fracture design schematic diagram of more well refracturings in the method for shale oil gas.
Main Reference label declaration:
1, the first producing well；
2, the first two wires alternate water injection well；
3, the one one line wheel infuses well；
4, center injection well；
5, the 2nd 1 line wheel infuses well；
6, the second two wires alternate water injection well；
7, the second producing well；
21, the first heating cable；
31, the second heating cable；
41, third heats cable；
51, the 4th heating cable；
61, slender acanthopanax electric heating cable；
8, fracturing fracture；
81, distalmost end crack；
82, middle part crack；
83, positioned at the crack of near wellbore zone.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now in conjunction in detail below
Embodiment carries out following detailed description to technical solution of the present invention, but should not be understood as the limit to enforceable range of the invention
It is fixed.
Embodiment 1
A kind of method for present embodiments providing middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas, institute
The condition for stating middle low-maturity shale oil oil reservoir is as follows: single layer effective thickness is 5 meters, total content of organic carbon (TOC, %) is 7%,
Reflectance of vitrinite (RO, %) is 0.5；
Wherein, the method for the middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas includes:
(1) 7 mouthfuls are disposed for 15 meters according to well spacing in low-maturity shale oil reservoir among the above and horizontal segment is parallel to each other
Horizontal well well group；Horizontal well positioned at the horizontal well well group center is center injection well 4, is located at the central horizontal well well group two
Two mouthfuls of water horizontal wells at end are respectively the first producing well 1 and the second producing well 7；First producing well 1 and the second producing well 7 are infused with center
Entering the well between well 4 is respectively the first two wires alternate water injection well 2, the second two wires alternate water injection well 6, the one one line wheel note well 3 and the 2nd 1 line
Alternate water injection well 5, well net deployment schematic diagram are as shown in Figure 1；
(2) center injection well 4 takes the contiguous volume pressure break mode pressure break shale oil reservoir of the more clusters of multistage, using oil base pressure
Split liquid construction, between every cluster crack between be divided into 3 meters；The dummy joint in crack is long than between center injection well 4 and both ends producing well
Well spacing is 5 meters big；
Fracturing fracture 8 is equidistantly divided into three sections from center injection well to producing well, is followed successively by splitting positioned near wellbore zone
Seam 83, middle part crack 82 and distalmost end crack 81, fractured well fracture design schematic diagram is respectively as shown in Fig. 2 a- Fig. 2 b；To farthest
The silicon-carbide particle proppant that 81 injection partial size of end check seam is 0.4mm, the high temperature resistant haydite of 0.4mm is injected to middle part crack 82
Grain proppant finally injects copper/alumina particles proppant of 0.4mm to the crack 83 for being located near wellbore zone, it is logical to establish thermally conductive water conservancy diversion
Road；
(3) Xiang Zhongxin injection well 4 and the first two wires alternate water injection well 2, the second two wires alternate water injection well 6, the one one line wheel note well 3 and the
21 line wheels infuse well 5 horizontal segment in respectively tripping in third heating cable 41, first heat cable 21, slender acanthopanax electric heating cable 61,
Second heating cable 31 and the 4th heating cable 51 and matched with those heating cables temperature pressure monitoring system (such as thermocouple and pressure
Force snesor etc.)；
Wherein, the power of those heating cables is respectively 1600W/m, stream in the heat and pit shaft that those heating cables generate
Heat exchange efficiency between gas through this section of pit shaft is 91%, those heating cables used in the present embodiment have constant temperature/perseverance
Power heating function；
(4) hot gas is injected from ground to center injection well 4 and electric heating is opened to center injection well 4, from the first production
Well 1 and the extraction of the second producing well 7；
In the present embodiment, hot gas used is high pressure N2, it is 310 DEG C that temperature is injected on hot gas ground, in being installed on
Temperature and pressure monitoring system alignment heart injection well shaft bottom (horizontal segment) in heart injection well shaft bottom (horizontal segment) carries out thermometric, further according to being surveyed
The temperature change obtained is installed on high energy resistance heater (the third heating cable in center injection well shaft bottom (horizontal segment) to control
41) power, to guarantee the hot gas temperature for entering oil reservoir by electric heating for 600 DEG C；
The injection rate of hot gas is 200m3/ unit center injection well horizontal section length；
(5) extraction gas is reheated after separation and is recycled into shale oil reservoir；
(6) reservoir temperature between well 5 is infused when center injection well 4 and the one one line wheel note well 3 and the 2nd 1 line wheel to have reached
After complete 450 DEG C of pyrolysis temperature, center injection well 4 stops electric heating, and Xiang Zhongxin injection well 4 injects gas at normal temperature (N2), room temperature gas
Body (N2) injection rate be 50m3/ unit center injection well horizontal section length；One one line wheel infuses well 3 and the 2nd 1 line wheel note
Well 5 opens electric heating；
(7) when the one one line wheel infuses the reservoir temperature between well 3 and the first two wires alternate water injection well 2, the 2nd 1 line wheel infuse well 5 with
After reservoir temperature between second two wires alternate water injection well 6 reaches 450 DEG C of complete pyrolysis temperature, center injection well 4 stops gas injection；First
One line wheel infuses well 3 and the 2nd 1 line wheel note well 5 stops electric heating, infuses well 3 to the one one line wheel and the 2nd 1 line wheel note well 5 injects
Gas at normal temperature (N2)；First two wires alternate water injection well 2, the second two wires alternate water injection well 6 open electric heating；
Reservoir temperature between the first two wires alternate water injection well 2 and the first producing well 1, the second two wires alternate water injection well 6 and second are raw
After reservoir temperature between production well 7 reaches 450 DEG C of complete pyrolysis temperature, stop exploitation.
Using low-maturity shale oil wide spacing converted in-situ exploits the side of shale oil gas in this provided by the present embodiment
Method realizes Horizontal Well away from the shale oil high-temp in-situ conversion exploitation for 15 meters, and shale kerogen thermal cracking rate reaches 92%,
Recovery ratio reaches 86%.
Embodiment 2
A kind of method for present embodiments providing middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas, institute
The condition for stating middle low-maturity shale oil oil reservoir is as follows: single layer effective thickness is 5 meters, total content of organic carbon (TOC, %) is 8%,
Reflectance of vitrinite (RO, %) is 0.75；
Wherein, the method for the middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas includes:
(1) 7 mouthfuls are disposed for 35 meters according to well spacing in low-maturity shale oil reservoir among the above and horizontal segment is parallel to each other
Horizontal well well group；Horizontal well positioned at the horizontal well well group center is center injection well 4, positioned at the horizontal well well group both ends
Two mouthfuls of water horizontal wells are respectively the first producing well 1 and the second producing well 7；First producing well 1 and the second producing well 7 and center injection well
Well between 4 is respectively the first two wires alternate water injection well 2, the second two wires alternate water injection well 6, the one one line wheel note well 3 and the 2nd 1 line wheel note
Well 5, well net deployment schematic diagram are as shown in Figure 1；
(2) center injection well 4, the one one line wheel note well 3, the 2nd 1 line wheel infuse well 5, the first two wires alternate water injection well the 2, the 2nd 2
Line wheel note well 6, the first producing well 1 and the second producing well 7 take the contiguous volume pressure break mode pressure break shale oil of the more clusters of multistage
Reservoir is constructed using oil base fracturing fluid, between every cluster crack between be divided into 4 meters；A length of 100 meters of the dummy joint in crack；
Fracturing fracture 8 is equidistantly divided into three sections from injection well to producing well, be followed successively by the crack 83 positioned near wellbore zone,
Middle part crack 82 and distalmost end crack 81, fractured well fracture design schematic diagram difference are as shown in Figure 2 c；To 81 note of distalmost end crack
Enter the silicon-carbide particle proppant that partial size is 1.0mm, the high temperature resistant haydite particles proppant of 1.0mm injected to middle part crack 82,
Copper/alumina particles proppant that 1.0mm is finally injected to the crack 83 for being located near wellbore zone, establishes thermally conductive flow-guiding channel；
(3) Xiang Zhongxin injection well 4 and the first two wires alternate water injection well 2, the second two wires alternate water injection well 6, the one one line wheel note well 3 and the
21 line wheels infuse well 5 horizontal segment in respectively tripping in third heating cable 41, first heat cable 21, slender acanthopanax electric heating cable 61,
Second heating cable 31 and the 4th heating cable 51 and matched with those heating cables temperature pressure monitoring system (such as thermocouple and pressure
Force snesor etc.)；
Wherein, the power of those heating cables is respectively 2000W/m, stream in the heat and pit shaft that those heating cables generate
Heat exchange efficiency between gas through this section of pit shaft is 92%, those heating cables used in the present embodiment have constant temperature/perseverance
Power heating function；
(4) hot gas is injected from ground to center injection well 4 and electric heating is opened to center injection well 4, from the first production
Well 1 and the extraction of the second producing well 7；
In the present embodiment, hot gas used is high pressure CO2, it is 350 DEG C that temperature is injected on hot gas ground, in being installed on
Temperature and pressure monitoring system alignment heart injection well shaft bottom (horizontal segment) in heart injection well shaft bottom (horizontal segment) carries out thermometric, further according to being surveyed
The temperature change obtained is installed on high energy resistance heater (the third heating cable in center injection well shaft bottom (horizontal segment) to control
41) power, to guarantee the hot gas temperature for entering oil reservoir by electric heating for 620 DEG C；
The injection rate of hot gas is 1000m3/ unit center injection well horizontal section length；
(5) extraction gas is reheated after separation and is recycled into shale oil reservoir；
(6) reservoir temperature between well 5 is infused when center injection well 4 and the one one line wheel note well 3 and the 2nd 1 line wheel to have reached
After complete 500 DEG C of pyrolysis temperature, center injection well 4 stops electric heating, and Xiang Zhongxin injection well 4 injects gas at normal temperature (CO2), room temperature gas
Body (CO2) injection rate be 75m3/ unit center injection well horizontal section length；One one line wheel infuses well 3 and the 2nd 1 line wheel note
Well 5 opens electric heating；
(7) when the one one line wheel infuses the reservoir temperature between well 3 and the first two wires alternate water injection well 2, the 2nd 1 line wheel infuse well 5 with
After reservoir temperature between second two wires alternate water injection well 6 reaches 500 DEG C of complete pyrolysis temperature, center injection well 4 stops gas injection；First
One line wheel infuses well 3 and the 2nd 1 line wheel note well 5 stops electric heating, infuses well 3 to the one one line wheel and the 2nd 1 line wheel note well 5 injects
Gas at normal temperature (CO2)；First two wires alternate water injection well 2, the second two wires alternate water injection well 6 open electric heating；
Reservoir temperature between the first two wires alternate water injection well 2 and the first producing well 1, the second two wires alternate water injection well 6 and second are raw
After reservoir temperature between production well 7 reaches 500 DEG C of complete pyrolysis temperature, stop exploitation.
Using low-maturity shale oil wide spacing converted in-situ exploits the side of shale oil gas in this provided by the present embodiment
Method realizes Horizontal Well away from the shale oil high-temp in-situ conversion exploitation for 35 meters, and shale kerogen thermal cracking rate reaches 95%,
Recovery ratio reaches 87%.
Embodiment 3
A kind of method for present embodiments providing middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas, institute
The condition for stating middle low-maturity shale oil oil reservoir is as follows: single layer effective thickness is 5 meters, total content of organic carbon (TOC, %) is
10%, reflectance of vitrinite (RO, %) is 1.0；
Wherein, the method for the middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas includes:
(1) 7 mouthfuls are disposed for 50 meters according to well spacing in low-maturity shale oil reservoir among the above and horizontal segment is parallel to each other
Horizontal well well group；Horizontal well positioned at the horizontal well well group center is center injection well 4, positioned at the horizontal well well group both ends
Two mouthfuls of water horizontal wells are respectively the first producing well 1 and the second producing well 7；First producing well 1 and the second producing well 7 and center injection well
Well between 4 distinguishes the first two wires alternate water injection well 2, the second two wires alternate water injection well 6, the one one line wheel note well 3 and the 2nd 1 line wheel and infuses well
5, well net deployment schematic diagram is as shown in Figure 1；
(2) center injection well 4, the one one line wheel note well 3, the 2nd 1 line wheel infuse well 5, the first two wires alternate water injection well the 2, the 2nd 2
Line wheel note well 6, the first producing well 1 and the second producing well 7 take the contiguous volume pressure break mode pressure break shale oil of the more clusters of multistage
Reservoir is constructed using oil base fracturing fluid, between every cluster crack between be divided into 5 meters；A length of 200 meters of the dummy joint in crack；
Fracturing fracture 8 is equidistantly divided into three sections from injection well to producing well, be followed successively by the crack 83 positioned near wellbore zone,
Middle part crack 82 and distalmost end crack 81, fractured well fracture design schematic diagram difference are as shown in Figure 2 c；To 81 note of distalmost end crack
Enter the silicon-carbide particle proppant that partial size is 1.0mm, the high temperature resistant haydite particles proppant of 1.0mm injected to middle part crack 82,
Copper/alumina particles proppant that 1.0mm is finally injected to the crack 83 for being located near wellbore zone, establishes thermally conductive flow-guiding channel；
(3) Xiang Zhongxin injection well 4 and the first two wires alternate water injection well 2, the second two wires alternate water injection well 6, the one one line wheel note well 3 and the
21 line wheels infuse well 5 horizontal segment in respectively tripping in third heating cable 41, first heat cable 21, slender acanthopanax electric heating cable 61,
Second heating cable 31 and the 4th heating cable 51 and matched with those heating cables temperature pressure monitoring system (such as thermocouple and pressure
Force snesor etc.)；
Wherein, the power of those heating cables is respectively 2500W/m, stream in the heat and pit shaft that those heating cables generate
Heat exchange efficiency between gas through this section of pit shaft is 95%, those heating cables used in the present embodiment have constant temperature/perseverance
Power heating function；
(4) hot gas is injected from ground to center injection well 4 and electric heating is opened to center injection well 4, from the first production
Well 1 and the extraction of the second producing well 7；
In the present embodiment, hot gas used is pressure-air, and it is 400 DEG C that temperature is injected on hot gas ground, using being installed on
Temperature and pressure monitoring system alignment heart injection well shaft bottom (horizontal segment) in center injection well shaft bottom (horizontal segment) carries out thermometric, further according to institute
The temperature change measured is installed on high energy resistance heater (the third heating cable in center injection well shaft bottom (horizontal segment) to control
41) power, to guarantee the hot gas temperature for entering oil reservoir by electric heating for 650 DEG C；
The injection rate of hot gas is 2000m3/ unit center injection well horizontal section length；
(5) extraction gas is reheated after separation and is recycled into shale oil reservoir；
(6) reservoir temperature between well 5 is infused when center injection well 4 and the one one line wheel note well 3 and the 2nd 1 line wheel to have reached
After complete 550 DEG C of pyrolysis temperature, center injection well 4 stops electric heating, and Xiang Zhongxin injection well 4 injects gas at normal temperature (air), room temperature
The injection rate of gas (air) is 100m3/ unit center injection well horizontal section length；One one line wheel infuses well 3 and the 2nd 1
Line wheel infuses well 5 and opens electric heating；
(7) when the one one line wheel infuses the reservoir temperature between well 3 and the first two wires alternate water injection well 2, the 2nd 1 line wheel infuse well 5 with
After reservoir temperature between second two wires alternate water injection well 6 reaches 550 DEG C of complete pyrolysis temperature, center injection well 4 stops gas injection；First
One line wheel infuses well 3 and the 2nd 1 line wheel note well 5 stops electric heating, infuses well 3 to the one one line wheel and the 2nd 1 line wheel note well 5 injects
Gas at normal temperature (air)；First two wires alternate water injection well 2, the second two wires alternate water injection well 6 open electric heating；
Reservoir temperature between the first two wires alternate water injection well 2 and the first producing well 1, the second two wires alternate water injection well 6 and second are raw
After reservoir temperature between production well 7 reaches 550 DEG C of complete pyrolysis temperature, stop exploitation.
Using low-maturity shale oil wide spacing converted in-situ exploits the side of shale oil gas in this provided by the present embodiment
Method realizes Horizontal Well away from the shale oil high-temp in-situ conversion exploitation for 50 meters, and shale kerogen thermal cracking rate reaches 98%,
Recovery ratio reaches 95%.
The above, only specific embodiments of the present invention cannot limit the range that invention is implemented with it, so it is equivalent
The displacement of component, or according to equivalent variations made by the invention patent protection scope and modification, should all still fall within what this patent was covered
Scope.In addition, between technical characteristic and technical characteristic in the present invention, between technical characteristic and technological invention, technological invention with
Use can be freely combined between technological invention.
Claims (23)
1. a kind of method of middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas, which is characterized in that in described
Low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas method include:
(1) in the middle low-maturity shale oil reservoir according to well spacing be 15-50 meters dispose at least 3 mouthfuls, well number be odd number and
The horizontal well well group that horizontal segment is parallel to each other, wherein the horizontal well positioned at the horizontal well well group center is center injection well, is located at
Two mouthfuls of water horizontal wells at both ends are producing well；
When disposing well number greater than 3 mouthfuls, the well between producing well and center injection well is alternate water injection well；
(2) the contiguous volume pressure break mode pressure break shale oil reservoir for using the more clusters of multistage, by crack from center injection well to production
Well is equidistantly divided into three sections, is followed successively by the crack positioned near wellbore zone, middle part crack and distalmost end crack, divides into three sections of cracks
Three-level is injected separately into different types of proppant, establishes thermally conductive flow-guiding channel；
(3) hot gas is injected from ground to center injection well, while the center injection well is electrically heated, adopted from producing well
Out；
(4) after the reservoir temperature between center injection well and line wheel note well reaches complete pyrolysis temperature, center injection well is stopped
Only electric heating injects gas at normal temperature in Xiang Zhongxin injection well；One line wheel infuses well and opens electric heating；
(5) after a line wheel, which infuses the reservoir temperature between well and two wires alternate water injection well, reaches complete pyrolysis temperature, center injection well is stopped
Only inject gas at normal temperature；One line wheel infuses well and stops electric heating, injects gas at normal temperature into line wheel note well；Two wires alternate water injection well is opened
Electric heating；So circulation, until the reservoir temperature between producing well and last line wheel note well adjacent thereto reaches complete heat
After solving temperature, stop exploitation.
2. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, in step (2), pressing crack construction is carried out to center injection well, if the dummy joint length ratio in discovery center injection well crack
The distance between center injection well and producing well are 5-10 meters big, stop pressure break.
3. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
Be characterized in that, in step (2), the dummy joint length in crack obtained by pressure break is 50-200 meters, between every cluster crack between be divided into 3-5m.
4. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 2,
Be characterized in that, in step (2), the dummy joint length in crack obtained by pressure break is 50-200 meters, between every cluster crack between be divided into 3-5m.
5. middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1-4
Method, which is characterized in that in step (2), a point three-level is injected separately into different types of proppant and includes: into three sections of cracks
To the implantation silicon carbide particles supports agent of distalmost end crack, high temperature resistant haydite particles proppant is injected in middle part crack, finally to
Copper/alumina particles proppant is injected in crack positioned near wellbore zone.
6. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 5,
It is characterized in that, in step (2), into three sections of cracks, a point three-level is injected separately into different types of proppant and includes:
The silicon-carbide particle proppant for being 0.4-1.6mm to distalmost end crack injection partial size, 0.4-1.6mm's injected in middle part crack
High temperature resistant haydite particles proppant, the copper/alumina particles branch for being finally 0.4-1.6mm to the crack injection partial size for being located near wellbore zone
Support agent.
7. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, power > 1500W/m of high energy resistance heater used in electric heating.
8. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, in step (3), the hot gas includes N2、CO2, air, one or more of hydrocarbon gas combination.
9. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, in step (3), the injection rate of the hot gas is 200-2000m3/ unit center injection well horizontal section length.
10. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 8,
It is characterized in that, in step (3), the injection rate of the hot gas is 200-2000m3/ unit center injection well horizontal section length.
11. according to claim 1, the described in any item middle low-maturity shale oil wide spacing converted in-situs of 8-10 exploit shale oil
The method of gas, which is characterized in that in step (3), temperature > 300 DEG C are injected on the hot gas ground, into the hot gas body temperature of oil reservoir
Degree is 600-650 DEG C.
12. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, in step (4), the complete pyrolysis temperature is 450-650 DEG C.
13. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, in step (5), the complete pyrolysis temperature is 450-650 DEG C.
14. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, the injection rate of the gas at normal temperature is 50-100m3The level of/unit center injection well or each line wheel note well
Segment length.
15. according to claim 1 or middle low-maturity shale oil wide spacing converted in-situ described in 14 exploits the side of shale oil gas
Method, which is characterized in that the gas at normal temperature includes N2、CO2, air, one or more of hydrocarbon gas combination.
16. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 1,
It is characterized in that, the method for low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas in this further include:
By the operation that gained extraction gas is reheated after separation and is recycled into shale oil reservoir in step (3).
17. middle low-maturity shale oil wide spacing converted in-situ according to claim 1-4 exploits shale oil gas
Method, which is characterized in that the single layer effective thickness of the middle low-maturity shale oil be greater than 4 meters, total content of organic carbon > 6%,
Reflectance of vitrinite is between 0.5-1.0%.
18. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 5,
Be characterized in that, the single layer effective thickness of the middle low-maturity shale oil be greater than 4 meters, total content of organic carbon > 6%, vitrinite it is anti-
Rate is penetrated between 0.5-1.0%.
19. exploiting shale oil gas according to the described in any item middle low-maturity shale oil wide spacing converted in-situs of claim 6-10
Method, which is characterized in that the single layer effective thickness of the middle low-maturity shale oil be greater than 4 meters, total content of organic carbon > 6%,
Reflectance of vitrinite is between 0.5-1.0%.
20. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 11,
It is characterized in that, the single layer effective thickness of the middle low-maturity shale oil is greater than 4 meters, total content of organic carbon > 6%, vitrinite
Reflectivity is between 0.5-1.0%.
21. the described in any item middle low-maturity shale oil wide spacing converted in-situs of 2-14 exploit shale oil according to claim 1
The method of gas, which is characterized in that the single layer effective thickness of the middle low-maturity shale oil be greater than 4 meters, total content of organic carbon >
6%, reflectance of vitrinite is between 0.5-1.0%.
22. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 15,
It is characterized in that, the single layer effective thickness of the middle low-maturity shale oil is greater than 4 meters, total content of organic carbon > 6%, vitrinite
Reflectivity is between 0.5-1.0%.
23. the method for middle low-maturity shale oil wide spacing converted in-situ exploitation shale oil gas according to claim 16,
It is characterized in that, the single layer effective thickness of the middle low-maturity shale oil is greater than 4 meters, total content of organic carbon > 6%, vitrinite
Reflectivity is between 0.5-1.0%.
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| CN111706312A (en) * | 2020-06-12 | 2020-09-25 | 中国地质大学（北京） | System for improving coal bed gas yield by mixing hot air proppant and working method thereof |
| WO2021031543A1 (en) * | 2019-08-19 | 2021-02-25 | 中国石油天然气股份有限公司 | Method and apparatus for determining integrated development approach for shale and adjacent oil layers |
| CN112727418A (en) * | 2021-01-20 | 2021-04-30 | 太原理工大学 | Simulation device for extracting oil shale from high-temperature fluid under control of multivariate factors |
| CN114017032A (en) * | 2021-11-03 | 2022-02-08 | 吉林大学 | Self-heating in-situ conversion development method for medium-low-maturity organic-rich shale |
| CN115095311A (en) * | 2022-07-15 | 2022-09-23 | 西安交通大学 | Low-grade shale resource development system and method |
| RU2802297C1 (en) * | 2023-02-13 | 2023-08-24 | Автономная некоммерческая образовательная организация высшего образования "Сколковский институт науки и технологий" (Сколковский институт науки и технологий) | Method for increasing oil recovery of kerogen-comprising shale formations |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4360233A (en) * | 1979-09-28 | 1982-11-23 | Occidental Oil Shale, Inc. | Method of bulking an in situ oil shale retort substantially full of fragmented shale |
| US4436153A (en) * | 1981-12-31 | 1984-03-13 | Standard Oil Company | In-situ combustion method for controlled thermal linking of wells |
| CN103114831A (en) * | 2013-02-25 | 2013-05-22 | 太原理工大学 | In-situ exploitation method for oil and gas resources of oil shale |
| CN106437657A (en) * | 2015-08-04 | 2017-02-22 | 中国石油化工股份有限公司 | Method for modifying and exploiting oil shale in situ through fluid |
| CN109356560A (en) * | 2018-12-19 | 2019-02-19 | 中国石油大学(北京) | In-situ retorting method and in-situ retorting well pattern |
| CN109424347A (en) * | 2017-08-30 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of normal pressure deep layer shale gas volume fracturing method |
-
2019
- 2019-03-26 CN CN201910231757.4A patent/CN110005390B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4360233A (en) * | 1979-09-28 | 1982-11-23 | Occidental Oil Shale, Inc. | Method of bulking an in situ oil shale retort substantially full of fragmented shale |
| US4436153A (en) * | 1981-12-31 | 1984-03-13 | Standard Oil Company | In-situ combustion method for controlled thermal linking of wells |
| CN103114831A (en) * | 2013-02-25 | 2013-05-22 | 太原理工大学 | In-situ exploitation method for oil and gas resources of oil shale |
| CN106437657A (en) * | 2015-08-04 | 2017-02-22 | 中国石油化工股份有限公司 | Method for modifying and exploiting oil shale in situ through fluid |
| CN109424347A (en) * | 2017-08-30 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of normal pressure deep layer shale gas volume fracturing method |
| CN109356560A (en) * | 2018-12-19 | 2019-02-19 | 中国石油大学(北京) | In-situ retorting method and in-situ retorting well pattern |
Non-Patent Citations (2)
| Title |
|---|
| 杨栋等: "电法原位加热油页岩采油技术与数值分析", 《辽宁工程技术大学学报》 * |
| 薛华庆等: "油页岩电加热原位开采技术研究进展", 《天然气技术》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021031543A1 (en) * | 2019-08-19 | 2021-02-25 | 中国石油天然气股份有限公司 | Method and apparatus for determining integrated development approach for shale and adjacent oil layers |
| RU2761946C1 (en) * | 2019-08-19 | 2021-12-14 | Петрочайна Компани Лимитед | Method and device for determining the approach to the integrated development of shale and neighboring oil reservoirs |
| US11692426B2 (en) | 2019-08-19 | 2023-07-04 | Petrochina Company Limited | Method and apparatus for determining integrated exploitation approach of shale and adjacent oil reservoirs |
| CN111706312A (en) * | 2020-06-12 | 2020-09-25 | 中国地质大学（北京） | System for improving coal bed gas yield by mixing hot air proppant and working method thereof |
| CN112727418A (en) * | 2021-01-20 | 2021-04-30 | 太原理工大学 | Simulation device for extracting oil shale from high-temperature fluid under control of multivariate factors |
| CN114017032A (en) * | 2021-11-03 | 2022-02-08 | 吉林大学 | Self-heating in-situ conversion development method for medium-low-maturity organic-rich shale |
| CN115095311A (en) * | 2022-07-15 | 2022-09-23 | 西安交通大学 | Low-grade shale resource development system and method |
| CN115095311B (en) * | 2022-07-15 | 2024-01-12 | 西安交通大学 | Low-grade shale resource development system and method |
| RU2802297C1 (en) * | 2023-02-13 | 2023-08-24 | Автономная некоммерческая образовательная организация высшего образования "Сколковский институт науки и технологий" (Сколковский институт науки и технологий) | Method for increasing oil recovery of kerogen-comprising shale formations |
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