CN103232852B - Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale - Google Patents
Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale Download PDFInfo
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- 239000004058 oil shale Substances 0.000 title claims abstract description 100
- 239000003079 shale oil Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 15
- 238000004821 distillation Methods 0.000 title claims abstract description 7
- 239000000126 substance Substances 0.000 title abstract description 4
- 238000011084 recovery Methods 0.000 claims abstract description 43
- 238000000197 pyrolysis Methods 0.000 claims abstract description 32
- 239000003570 air Substances 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000001590 oxidative effect Effects 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000011049 filling Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000009795 derivation Methods 0.000 claims description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 19
- 238000002485 combustion reaction Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 239000006004 Quartz sand Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 6
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 238000003809 water extraction Methods 0.000 claims description 4
- 238000003763 carbonization Methods 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 238000004155 tailings processing Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 69
- 239000000463 material Substances 0.000 description 7
- 238000005065 mining Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 239000003129 oil well Substances 0.000 description 3
- 238000001311 chemical methods and process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
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- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
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- 239000011159 matrix material Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21B43/243—Combustion in situ
-
- 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
- E21B43/243—Combustion in situ
- E21B43/247—Combustion in situ in association with fracturing processes or crevice forming processes
-
- 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
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
-
- 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
- E21B43/2607—Surface equipment specially adapted for fracturing operations
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- 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
- E21B43/34—Arrangements for separating materials produced by the 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)
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Abstract
The invention provides a method and a process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of an oil shale. The method comprises the steps of drilling a shaft on an underground oil shale layer, injecting high-pressure medium (air, water and sand) into the oil shale layer; fracturing out a 1-3mm of crack on the oil shale layer by taking the shaft as a center; filling a crack support, and building an oil-gas channel; adding a heating device to the oil shale layer; heating the oil shale layer to 550 DEG C; initially distilling the oil shale, extracting the shale oil and gas, and leading the shale oil and gas out of the ground through the oil-gas channel; then leading in an oxidant to carry out oxidizing reaction on contained asphaltene and fixed carbon after the oil shale is distilled; and taking the generated heat energy as a heat source for subsequent distillation to achieve underground in-situ extraction of the shale oil. The world problems of large recovery cost, difficult tailings processing, a plurality of environmental protection problems and large land usage of ground dry distillation at present are solved.
Description
Technical field
The present invention discloses method and the technique that shale oil gas is extracted in the destructive distillation of a kind of oil shale in-situ vertical shaft pressure break chemistry, utilizes the underground in-situ extraction shale oil of resinous shale, and the unconventional oil gas energy of petroleum resources deficiency, belongs to oil retorting technique field as a supplement.
Technical background
At present, resinous shale can be refined shale oil by retorting technique----artificial petroleum, the natural oil of substituting; Also can utilize its combustion power generation.Under the high situation of current oil price, shale oil refining has good economic benefit, is a most real available large measure that supplements natural oil deficiency; Oil shale generating, to lacking coal province, district has more good economy, environmental protection, social benefit.But traditional development mode is all to take underground mining, shale oil is produced in destructive distillation on the ground, and its shortcoming is a lot:
(1) cost of mining of destructive distillation is on the ground large;
(2) land seizure of destructive distillation on the ground amount is large;
(3) destructive distillation on the ground causes a large amount of land subsidence of mining area;
(4) the residue treatment difficulty after destructive distillation is on the ground large, and bulk deposition causes secondary pollution;
(5) after destructive distillation on the ground, residue is taken away amount of heat, and the heat energy of residue can not utilize, and causes energy dissipation;
(6) destructive distillation on the ground produces waste gas, sewage environmental pollution exceed standard.
Summary of the invention
The invention discloses oil shale in-situ vertical shaft pressure break chemistry method for destructive distillation and technique, fundamentally solved above-mentioned shortcoming and problem that underground mining, destructive distillation on the ground bring.
the method of shale oil gas is extracted in oil shale in-situ vertical shaft pressure break chemistry disclosed by the invention destructive distillation, and its technical solution is as follows:
According to oil shale layer situation, the pressure break of drilling on the ground burning well and several mouthfuls of derivation recovery wells are to subterranean oil shale layer, and deriving recovery well is honeycombed layout centered by pressure break burning well; In pressure break burning well, set up pressure break chamber, oil shale layer is carried out to pressure break; In pressure break burning well, inject oil shale layer high-pressure medium (air, water, quartz sand), in oil shale layer, pressure break goes out the crack of some 1-3mm, and in crack, blind upholder (quartz sand), sets up gas channel; In pressure break burning well, set up combustion chamber, to combustion chamber, inject inflammable gas and combustion-supporting gas, ignited flammable gas makes inflammable gas burn in combustion chamber bottom (combustiblematerials in light fluid shale), oil shale layer is heated to 550 ~ 600 ℃, realize resinous shale heating destructive distillation, drive and carry shale oil, gas; Shale oil, gas are derived ground by gas channel and derivation recovery well; In oil shale layer, by vertical shaft, pass into last bituminous matter and fixed carbon generation oxidizing reaction after oxygenant and oil shale distillation, the heat energy of generation, as the thermal source of follow-up destructive distillation, is realized the underground original position continuous carbonization of resinous shale and is extracted shale oil, gas; Shale oil, the gas of deriving ground are separated through ground gas-liquid separation device, and separated shale oil is delivered to product tank storage and sold; Combustible gas is delivered to gas power generator and is used for generating electricity.
realize oil shale in-situ vertical shaft pressure break chemistry of the present invention destructive distillation and extract the technique of shale oil gas method, comprise the following steps:
1) according to oil shale layer, distribute, move towards, selected pressure break burning well and derivation recovery well particular location, the pressure break of drilling on the ground burning well and derivation recovery well are to subterranean oil shale layer, pressure break burning well drilling depth should be as the criterion not penetrate oil shale layer, deriving recovery well should be as the criterion to penetrate oil shale layer, and described derivation recovery well is honeycombed layout centered by pressure break burning well;
2) in pressure break burning well, set up pressure break chamber, take out well casing, by pressure break burning well, to oil shale layer, inject high-pressure medium, oil shale layer pressure break is gone out to the crack of some 1-3mm, blind upholder quartz sand, sets up gas channel, and concrete steps are as follows:
1. drifting and well-flushing;
2. in pit shaft, be lowered to waterpower sleeve pipe shower nozzle;
3. closed casing and crag space, make oil shale layer form the pressure break space of sealing;
4. adopt waterpower sleeve pipe shower nozzle to carry out hydraulic jet perforation to oil shale layer, the mortar that first pumps into base fluid (water) and sand-carrying agent 20 ~ 35% carries out the cutting stage, when sand-carrying agent is during apart from nozzle 250m left and right, promote rapidly pump speed to guarantee to obtain the required enough pressure reduction (55 ~ 80MPa) of cutting perforation;
5. after abrasive perforating 2-3min, spray orifice detritus is replaced;
6. pump into again crosslinked guanidine glue and sand (ratio 20 ~ 30:40 ~ 60) to increase expansion dynamics;
7. open flow after pressing, sand washing support fracturing gap;
8. to filling liquid temporary plugging agent in pit shaft;
9. on, carry drilling tool, above carry drilling tool to design attitude, 3. one deck under pressure break, repeat ~ 6. walk.
3) at pressure break burning well, set up combustion chamber,
1. well-flushing, goes out ground by the sand water extraction in pressure break burning well,
2. pressure break burning well head is added to 0.5m Sealed casing pipe under oil shale layer, utilizes swelling agent closed casing and borehole wall space;
3. in pressure break burning well, install combustible gas and air input pipe and electronic ignition system additional, sealing well head, forms combustion chamber at resinous shale interval;
4. by combustible gas transfer lime, to combustion chamber, carry LPG and air; Utilize electronic ignition system to light combustible gas;
5. after light fluid shale, to oil shale layer, heat to 550 ~ 600 ℃, recording derives recovery well and comes temperature degree to reach 200 ℃, stops for combustible gas, drives and carries part shale oil, gas is derived recovery well to ground gas and oil separating plant by gas channel;
4) continue to inject high-pressure air in well, make in oil shale layer remaining bituminous matter and fixed carbon generation oxidizing reaction after destructive distillation, under hot conditions, carry out oxidizing reaction, produce new inflammable gas (drive simultaneously and carry shale oil, gas) by gas channel and derive recovery well and derive ground;
5) shale oil on derivation ground, gas are through the separation of ground gas-liquid separation device, and the shale oil separating is delivered to product tank storage and sold;
6) inflammable gas separating through gas-liquid separation device is delivered to gas power generator and is used for generating electricity.
Described derivation recovery well is six mouthfuls and is honeycombed layout.
Described high-pressure medium is selected from: air, water or mortar.
Described oxygenant is selected from: air or oxygen rich gas.
Described waterpower sleeve pipe shower nozzle, is mainly comprised of upper centralizer, spray gun, check valve, lower centralizer, screen casing, guide shoe, and the surface of spray gun is provided with nozzle, and one end of spray gun is communicated with sleeve pipe by short circuit, and the other end is communicated with screen casing by check valve; The outside cover of short circuit has upper centralizer; On the tube wall of screen casing, be evenly distributed with some sieve apertures, lower centralizer is enclosed within on screen casing, and guide shoe is fixed on the top of screen casing.
positively effect of the present invention is:utilize the underground in-situ extraction shale oil of resinous shale, by the chemical heat intensive treatment process of pressure break chemistry destructive distillation shale oil gas, removed a large amount of exploitations to oil shale mine, the environmental pollution of having avoided destructive distillation on the ground to bring from.The 2nd, utilize remaining bituminous matter after destructive distillation, fixed carbon, realized underground continuous carbonization, heat is self-sufficient.The 3rd, the process of chemical heat intensive treatment, is not single physical heating treating processes, neither underground spontaneous combustion treating processes, and in reaction process, rock inner pore progressively increases, and it is applicable to most oil shale formations.The present invention has less investment, operation cost is low, environmental pollution is little, resource utilization is high and the advantage such as produce oil aerogenesis instant effect.
Accompanying drawing explanation
Fig. 1 is oil shale in-situ vertical shaft pressure break chemistry method for destructive distillation schematic diagram of the present invention;
This present invention of Fig. 2 vertical shaft distributed architecture schematic diagram;
Fig. 3 is waterpower sleeve pipe nozzle structure schematic diagram of the present invention;
In figure: 1, pressure break burning well; 2, derive recovery well; 3, gas-liquid separation device; 4, product tank; 5, gas power generator; 6, oil shale layer; 7, other rock stratum; 8, gas channel; 9, material conveyor; 10 dispatch machines; 11, oil well pump; 12, crack; 13, frac tank; 14, LPG hold-up vessel; 15, oxygenant tank; 16, upper centralizer; 17, spray gun; 18, nozzle; 19, check valve; 20, lower centralizer; 21, screen casing; 22, guide shoe; 23, sleeve pipe; 24, short circuit.
Embodiment
By specific embodiment, describe below the beneficial effect of implementation process of the present invention and generation in detail, be intended to help reader to understand better essence of the present invention and feature, not as restriction that can practical range to this case.
In conjunction with Fuyu County--ridge, Changchun oil shale mine is as implementing base, and Fuyu County---ridge, Changchun oil shale resources total reserves is 452.74 hundred million tons.Resinous shale average grade 5.53%, total resources that can commercial exploitation is 18,000,000,000, buried depth 160-800m, top board and base plate are beige shale, oil shale layer mean thickness 5m.
As shown in Figure 1, according to oil shale layer, distribute, move towards, selected pressure break burning well and derivation recovery well particular location, beat a bite pressure break burning well 1(well head diameter 200mm) and six mouthfuls of derivation recovery well 2(well head diameter 200mm) by subterranean strata 7 (380 meters apart from ground) to subterranean oil shale layer 6; Shown in 2, pressure break burning well 1 is positioned at center by reference to the accompanying drawings, derives recovery well 2 for six mouthfuls and centered by pressure break burning well 1, is honeycombed distribution; The pressure break of drilling on the ground burning well and derivation recovery well are to subterranean oil shale layer, pressure break burning well drilling depth should be as the criterion not penetrate oil shale layer, deriving recovery well should be as the criterion to penetrate oil shale layer, and described derivation recovery well is honeycombed layout centered by pressure break burning well.
2) in pressure break burning well, set up pressure break chamber, take out well casing, by pressure break burning well, to oil shale layer, inject high-pressure medium, oil shale layer pressure break is gone out to the crack of some 1-3mm, blind upholder quartz sand, sets up gas channel, and concrete steps are as follows:
1. drifting and well-flushing;
2. in pit shaft, be lowered to waterpower sleeve pipe shower nozzle;
3. closed casing and crag space, make oil shale layer form the pressure break space of sealing;
4. adopt waterpower sleeve pipe shower nozzle to carry out hydraulic jet perforation to oil shale layer 6; in pressure break burning well 1, by material conveyor 9, by frac tank 13, to oil shale layer 6, inject base fluid (water) and sand-carrying agent (20 ~ 35% mortars) (cutting stage); when sand-carrying agent is during apart from nozzle 250m left and right; promote rapidly pump speed to guarantee that obtaining the required enough pressure reduction (55 ~ 80MPa) of cutting perforation goes out 1-3mm crack 12 by oil shale layer 6 pressure breaks
5. after abrasive perforating 2-3min, will spray empty detritus and replace;
6. the maximum pump speed allowing according to design annular space discharge capacity or annular space top pressure pumps into guanidine matrix liquid by annular space, according to design, by pumping into of oil pipe, is cross-linked guanidine glue and sand (increasing expansion dynamics);
7. open flow after pressing, remaining quartz sand becomes blind upholder, forms many gas channels 8, and many gas channels 8 collect and are communicated with derivation recovery well 2;
8. to filling liquid temporary plugging agent in pit shaft;
9. on, carry drilling tool, above carry drilling tool to design attitude, proceed upper strata fracturing process refracturing, until the whole pressure breaks of oil shale layer are complete.
3) at pressure break burning well, set up combustion chamber,
The first step, well-flushing, goes out ground by the sand water extraction in well,
Second step, well head is added to 0.5m Sealed casing pipe under oil shale layer, utilizes swelling agent closed casing and borehole wall space;
The 3rd step installs combustible gas and air input pipe and electronic ignition system additional in well, and sealing well head, forms combustion chamber at resinous shale interval;
The 4th step, LPG hold-up vessel 14 and oxygenant tank 15 add LPG and air by pressure break burning well 1 to oil shale layer 6 by material conveyor 9, utilize electronic ignition system to light combustible gas;
The 6th step, after light fluid shale, heats to 550 ~ 600 ℃ to oil shale layer 6, and recording derives recovery well 2 and come temperature degree to reach 200 ℃, stops for combustible gas, drives and carries part shale oil, gas is derived recovery wells 2 to ground gas and oil separating plant 3 by gas channel 8;
By pass into contained bituminous matter and fixed carbon generation oxidizing reaction after oxygenant and oil shale distillation in oil shale layer 6, the heat energy of generation is as the thermal source of follow-up destructive distillation, laddering destructive distillation later stage resinous shale, and shale oil, the gas of generation pass through
4) by material conveyor 9, by oxygenant tank 15, continued to the interior injection high-pressure air (air: 1000m of pressure break burning well 1
3/ hour), make in oil shale layer 6 remaining bituminous matter and fixed carbon after destructive distillation under hot conditions, carry out oxidizing reaction, produce new inflammable gas (drive simultaneously and carry shale oil, gas), by gas channel 8, by deriving recovery well 2 derivation ground, enter into gas-liquid separation device 3 again, realize underground in-situ extraction shale oil, gas;
5) shale oil on derivation ground, gas are through 3 separation of ground gas-liquid separation device, and the shale oil separating is delivered to product tank 4 storages by oil well pump 11 and sold.
6) inflammable gas separating through gas-liquid separation device 3 is delivered to gas power generator 5 by dispatch machine 10 and is used for generating electricity.
In conjunction with front Guo's oil shale mine as implementing base, mining area total area 675.5km2,61.72 hundred million tons of total resources, 49.4 hundred million tons of exploitable resources amounts, resinous shale average grade 5%, buried depth 160-800m, top board and base plate are beige shale, oil shale layer mean thickness 6m.
As shown in Figure 1, according to oil shale layer, distribute, move towards, selected pressure break burning well and derivation recovery well particular location, beat a bite pressure break burning well 1(well head diameter 200mm) and six mouthfuls of derivation recovery well 2(well head diameter 200mm) by subterranean strata 7 (380 meters apart from ground) to subterranean oil shale layer 6; Shown in 2, pressure break burning well 1 is positioned at center by reference to the accompanying drawings, derives recovery well 2 for six mouthfuls and centered by pressure break burning well 1, is honeycombed distribution; The pressure break of drilling on the ground burning well and derivation recovery well are to subterranean oil shale layer, pressure break burning well drilling depth should be as the criterion not penetrate oil shale layer, deriving recovery well should be as the criterion to penetrate oil shale layer, and described derivation recovery well is honeycombed layout centered by pressure break burning well.
2) in pressure break burning well, set up pressure break chamber, take out well casing, by pressure break burning well, to oil shale layer, inject high-pressure medium, oil shale layer pressure break is gone out to the crack of some 1-3mm, blind upholder quartz sand, sets up gas channel, and concrete steps are as follows:
1. drifting and well-flushing;
2. in pit shaft, be lowered to waterpower sleeve pipe shower nozzle;
3. closed casing and crag space, make oil shale layer form the pressure break space of sealing;
4. adopt waterpower sleeve pipe shower nozzle to carry out hydraulic jet perforation to oil shale layer 6, in pressure break burning well 1, by material conveyor 9, by frac tank 13, to oil shale layer 6, inject base fluid (water) and sand-carrying agent (20 ~ 35% mortars) (cutting stage), when sand-carrying agent is during apart from nozzle 250m left and right, promote rapidly pump speed to guarantee that obtaining the required enough pressure reduction (55 ~ 80MPa) of cutting perforation goes out 1-3mm crack 12 by oil shale layer 6 pressure breaks;
5. after abrasive perforating 2-3min, will spray empty detritus and replace;
6. the maximum pump speed allowing according to design annular space discharge capacity or annular space top pressure pumps into guanidine matrix liquid by annular space, according to design, by pumping into of oil pipe, is cross-linked guanidine glue and sand (increasing expansion dynamics);
7. open flow after pressing, remaining quartz sand becomes blind upholder, forms many gas channels 8, and many gas channels 8 collect and are communicated with derivation recovery well 2;
8. to filling liquid temporary plugging agent in pit shaft;
9. on, carry drilling tool, above carry drilling tool to design attitude, proceed upper strata fracturing process refracturing, until the whole pressure breaks of oil shale layer are complete.
3) at pressure break burning well, set up combustion chamber,
The first step, well-flushing, goes out ground by the sand water extraction in well,
Second step, well head is added to 0.5m Sealed casing pipe under oil shale layer, utilizes swelling agent closed casing and borehole wall space;
The 3rd step installs combustible gas and air input pipe and electronic ignition system additional in well, and sealing well head, forms combustion chamber at resinous shale interval;
The 4th step, LPG hold-up vessel 14 and oxygenant tank 15 add LPG and air by pressure break burning well 1 to oil shale layer 6 by material conveyor 9, utilize electronic ignition system to light combustible gas;
The 6th step, after light fluid shale, heats to 550 ~ 600 ℃ to oil shale layer 6, and recording derives recovery well 2 and come temperature degree to reach 200 ℃, stops for combustible gas, drives and carries part shale oil, gas is derived recovery wells 2 to ground gas and oil separating plant 3 by gas channel 8;
By pass into contained bituminous matter and fixed carbon generation oxidizing reaction after oxygenant and oil shale distillation in oil shale layer 6, the heat energy of generation is as the thermal source of follow-up destructive distillation, laddering destructive distillation later stage resinous shale, and shale oil, the gas of generation pass through
4) by material conveyor 9, by oxygenant tank 15, continued to the interior injection high-pressure air (air: 1000m of pressure break burning well 1
3/ hour), make in oil shale layer 6 remaining bituminous matter and fixed carbon after destructive distillation under hot conditions, carry out oxidizing reaction, produce new inflammable gas (drive simultaneously and carry shale oil, gas), by gas channel 8, by deriving recovery well 2 derivation ground, enter into gas-liquid separation device 3 again, realize underground in-situ extraction shale oil, gas;
The shale oil on derivation ground, gas are through 3 separation of ground gas-liquid separation device, and the shale oil separating is delivered to product tank 4 storages by oil well pump 11 and sold.
The inflammable gas separating through gas-liquid separation device 3 is delivered to gas power generator 5 by dispatch machine 10 and is used for generating electricity.
embodiment 3
According to Fig. 3, the waterpower sleeve pipe shower nozzle that embodiment 1 ~ 2 relates to, mainly by upper centralizer 16, spray gun 17, check valve 19, lower centralizer 20, screen casing 22, guide shoe 23, sleeve pipe 23, short circuit 24, formed, wherein, the surface of spray gun 17 is provided with nozzle 18, one end of spray gun 17 is communicated with sleeve pipe 23 by short circuit 24, and the other end is communicated with screen casing 21 by check valve 19; The outside cover of short circuit 24 has upper centralizer 16; On the tube wall of screen casing 21, be evenly distributed with some sieve apertures, lower centralizer 20 is enclosed within on screen casing 21, and guide shoe 22 is fixed on the top of screen casing 21.
Claims (2)
1. a method for shale oil gas is extracted in the destructive distillation of oil shale in-situ vertical shaft pressure break chemistry, it is characterized in that:
According to oil shale layer situation, the pressure break of drilling on the ground burning well and several mouthfuls of derivation recovery wells are to subterranean oil shale layer, and deriving recovery well is honeycombed layout centered by pressure break burning well; In pressure break burning well, set up pressure break chamber, oil shale layer is carried out to pressure break; In pressure break burning well, inject oil shale layer high-pressure medium: air, water or quartz sand, in oil shale layer, pressure break goes out the crack of some 1 ~ 3mm, blind upholder in crack: quartz sand, set up gas channel; In pressure break burning well, set up combustion chamber, to combustion chamber, inject inflammable gas and combustion-supporting gas, ignited flammable gas makes inflammable gas burn in bottom, combustion chamber, combustiblematerials in light fluid shale, oil shale layer is heated to 550 ~ 600 ℃, realize resinous shale heating destructive distillation, drive and carry shale oil, gas; Shale oil, gas are derived ground by gas channel and derivation recovery well; In oil shale layer, by vertical shaft, pass into last bituminous matter and fixed carbon generation oxidizing reaction after oxygenant and oil shale distillation, the heat energy of generation, as the thermal source of follow-up destructive distillation, is realized the underground original position continuous carbonization of resinous shale and is extracted shale oil, gas; Shale oil, the gas of deriving ground are separated through ground gas-liquid separation device, and separated shale oil is delivered to product tank storage and sold; Combustible gas is delivered to gas power generator and is used for generating electricity.
2. realize oil shale in-situ vertical shaft pressure break chemistry destructive distillation described in claim 1 and extract the technique of shale oil gas method, comprise the following steps:
1) according to oil shale layer, distribute, move towards, selected pressure break burning well and derivation recovery well particular location, the pressure break of drilling on the ground burning well and derivation recovery well are to subterranean oil shale layer, pressure break burning well drilling depth should be as the criterion not penetrate oil shale layer, deriving recovery well should be as the criterion to penetrate oil shale layer, and described derivation recovery well is honeycombed layout centered by pressure break burning well;
2) in pressure break burning well, set up pressure break chamber, take out well casing, by pressure break burning well, to oil shale layer, inject high-pressure medium, oil shale layer pressure break is gone out to the crack of some 1 ~ 3mm, blind upholder quartz sand, sets up gas channel, and concrete steps are as follows:
1. drifting and well-flushing;
2. in pit shaft, be lowered to waterpower sleeve pipe shower nozzle;
3. closed casing and crag space, make oil shale layer form the pressure break space of sealing;
4. adopt waterpower sleeve pipe shower nozzle to carry out hydraulic jet perforation to oil shale layer, the mortar that first pumps into base fluid water and sand-carrying agent 20 ~ 35% carries out the cutting stage, when sand-carrying agent is during apart from nozzle 250m left and right, promote rapidly pump speed to guarantee to obtain the required enough pressure reduction of cutting perforation: 55 ~ 80MPa;
5. after abrasive perforating 2-3min, spray orifice detritus is replaced;
6. pump into again the crosslinked guanidine glue in ratio 20 ~ 30:40 ~ 60 and sand to increase expansion dynamics;
7. open flow after pressing, sand washing support fracturing gap;
8. to filling liquid temporary plugging agent in pit shaft;
9. on, carry drilling tool, above carry drilling tool to design attitude, 3. one deck under pressure break, repeat ~ 6. walk;
3) at pressure break burning well, set up combustion chamber,
1. well-flushing, goes out ground by the sand water extraction in pressure break burning well,
2. pressure break burning well head is added to 0.5m Sealed casing pipe under oil shale layer, utilizes swelling agent closed casing and borehole wall space;
3. in pressure break burning well, install combustible gas and air input pipe and electronic ignition system additional, sealing well head, forms combustion chamber at resinous shale interval;
4. by combustible gas transfer lime, to combustion chamber, carry LPG and air; Utilize electronic ignition system to light combustible gas;
5. after light fluid shale, to oil shale layer, heat to 550 ~ 600 ℃, recording derives recovery well and comes temperature degree to reach 200 ℃, stops for combustible gas, drives and carries part shale oil, gas is derived recovery well to ground gas and oil separating plant by gas channel;
4) continue to inject high-pressure air in well, make in oil shale layer remaining bituminous matter and fixed carbon generation oxidizing reaction after destructive distillation, under hot conditions, carry out oxidizing reaction, produce new inflammable gas, drive simultaneously and carry shale oil, gas, by gas channel and derivation recovery well, they are derived to ground;
5) shale oil on derivation ground, gas are through the separation of ground gas-liquid separation device, and the shale oil separating is delivered to product tank storage;
6) inflammable gas separating through gas-liquid separation device is delivered to gas power generator and is used for generating electricity.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152533.7A CN103232852B (en) | 2013-04-28 | 2013-04-28 | Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale |
| PCT/CN2014/000459 WO2014176932A1 (en) | 2013-04-28 | 2014-05-04 | Method and process for shale oil and gas extraction by fracturing and chemical retorting in oil shale in situ vertical well |
| US14/787,732 US20160069170A1 (en) | 2013-04-28 | 2014-05-04 | Method and process for extracting shale oil and gas by fracturing and chemical retorting in oil shale in-situ vertical well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310152533.7A CN103232852B (en) | 2013-04-28 | 2013-04-28 | Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale |
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| Publication Number | Publication Date |
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| CN103232852A CN103232852A (en) | 2013-08-07 |
| CN103232852B true CN103232852B (en) | 2014-03-26 |
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| CN201310152533.7A Active CN103232852B (en) | 2013-04-28 | 2013-04-28 | Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale |
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| Country | Link |
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| US (1) | US20160069170A1 (en) |
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| WO (1) | WO2014176932A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103232852B (en) * | 2013-04-28 | 2014-03-26 | 吉林省众诚汽车服务连锁有限公司 | Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale |
| CN103233713B (en) * | 2013-04-28 | 2014-02-26 | 吉林省众诚汽车服务连锁有限公司 | Method and process for extracting shale oil gas through oil shale in situ horizontal well fracture chemical destructive distillation |
| CN106285596A (en) * | 2015-05-27 | 2017-01-04 | 中国石油化工股份有限公司 | Oil shale in-situ oil production method |
| CN106285597B (en) * | 2015-05-27 | 2019-06-18 | 中国石油化工股份有限公司 | Oil shale in-situ oil production method |
| CN107060716B (en) * | 2017-06-14 | 2023-02-07 | 长春工程学院 | Oil shale underground in-situ jet splitting construction device and construction process |
| CN107420077A (en) * | 2017-09-06 | 2017-12-01 | 中国矿业大学(北京) | One kind is based on high energy CO2The shale oil recovery method and device of fluid fracturing |
| CN107829744B (en) * | 2017-09-26 | 2019-12-10 | 中国石油天然气股份有限公司 | construction method of pile foundation type test well |
| CN107564395B (en) * | 2017-09-26 | 2019-12-10 | 中国石油天然气股份有限公司 | Simulation experiment well |
| CN107474868B (en) * | 2017-09-29 | 2023-06-27 | 新疆国利衡清洁能源科技有限公司 | Underground oil production system of oil shale and oil production method thereof |
| CN107764718A (en) * | 2017-11-14 | 2018-03-06 | 北京科技大学 | Fractured shale gas-water phases flowing fracture condudtiviy evaluating apparatus and method |
| CN109854219B (en) * | 2019-02-14 | 2023-12-12 | 赵金岷 | Oil shale convection in-situ exploitation circulating heating system and exploitation method |
| CN110541695A (en) * | 2019-09-05 | 2019-12-06 | 西安科技大学 | Efficient oil extraction method for in-situ pyrolysis of oil-rich coal by superheated steam |
| CN111022021A (en) * | 2020-01-02 | 2020-04-17 | 吉林大学 | Oil shale in-situ heating method for coping with thermal expansion characteristics of oil shale formation |
| CN112196506B (en) * | 2020-09-26 | 2022-12-09 | 陕西省煤田地质集团有限公司 | Coal bed in-situ pyrolysis method |
| CN114439436A (en) * | 2020-11-04 | 2022-05-06 | 中国石油天然气股份有限公司 | Thermal recovery system for injecting nitrogen into oil shale |
| CN113447516B (en) * | 2021-06-19 | 2024-03-19 | 辽宁石油化工大学 | Experimental research method for thermal crushing of hydrated shale |
| CN113374460B (en) * | 2021-06-23 | 2022-09-02 | 沈阳化工大学 | Method for extracting shale oil and high-calorific-value fuel gas from self-heating underground dry distillation oil shale |
| CN114718539B (en) * | 2022-05-12 | 2024-01-02 | 中国石油大学(华东) | In-situ combustion explosion fracturing method in multi-round methane layer |
| CN115095306B (en) * | 2022-06-14 | 2024-04-30 | 长江大学 | Oil shale air/CO2Alternate injection in-situ combustion method and application |
| CN115012891B (en) * | 2022-06-23 | 2024-03-22 | 赵金岷 | In-situ oil shale exploitation method based on domino effect |
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| US2887160A (en) * | 1955-08-01 | 1959-05-19 | California Research Corp | Apparatus for well stimulation by gas-air burners |
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| CN203499664U (en) * | 2013-04-28 | 2014-03-26 | 吉林省众诚汽车服务连锁有限公司 | Device used for extracting shale oil and gas by fracturing and chemical dry distillation of oil shale in-situ vertical shaft |
| CN103232852B (en) * | 2013-04-28 | 2014-03-26 | 吉林省众诚汽车服务连锁有限公司 | Method and process for extracting shale oil and gas by in-situ shaft fracturing chemical distillation of oil shale |
| CN103233713B (en) * | 2013-04-28 | 2014-02-26 | 吉林省众诚汽车服务连锁有限公司 | Method and process for extracting shale oil gas through oil shale in situ horizontal well fracture chemical destructive distillation |
| CN203499663U (en) * | 2013-04-28 | 2014-03-26 | 吉林省众诚汽车服务连锁有限公司 | Device for extracting shale oil and gas by virtue of fracturing and chemical dry distillation of oil shale in-situ horizontal wells |
-
2013
- 2013-04-28 CN CN201310152533.7A patent/CN103232852B/en active Active
-
2014
- 2014-05-04 US US14/787,732 patent/US20160069170A1/en not_active Abandoned
- 2014-05-04 WO PCT/CN2014/000459 patent/WO2014176932A1/en active Application Filing
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|---|---|
| WO2014176932A1 (en) | 2014-11-06 |
| CN103232852A (en) | 2013-08-07 |
| US20160069170A1 (en) | 2016-03-10 |
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