CN104847321A - Horizontal well thermo-chemical oil extraction method for ultra-deep thickened oil - Google Patents
Horizontal well thermo-chemical oil extraction method for ultra-deep thickened oil Download PDFInfo
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- CN104847321A CN104847321A CN201410054208.1A CN201410054208A CN104847321A CN 104847321 A CN104847321 A CN 104847321A CN 201410054208 A CN201410054208 A CN 201410054208A CN 104847321 A CN104847321 A CN 104847321A
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- steam
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- 239000000126 substance Substances 0.000 title claims abstract description 15
- 238000000605 extraction Methods 0.000 title abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000003921 oil Substances 0.000 claims abstract description 49
- 230000003197 catalytic effect Effects 0.000 claims abstract description 29
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 28
- 239000000243 solution Substances 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 20
- 238000011084 recovery Methods 0.000 claims description 12
- 230000009467 reduction Effects 0.000 claims description 11
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 239000000295 fuel oil Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 2
- 239000002608 ionic liquid Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000010779 crude oil Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000009671 shengli Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007233 catalytic pyrolysis Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 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
-
- 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
- E21B43/164—Injecting CO2 or carbonated water
-
- 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
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
-
- 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
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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)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a horizontal well thermo-chemical oil extraction method for ultra-deep thickened oil. The method comprises the following steps that an oil pipe in a horizontal well extends into the ultra-deep thickened oil layer; supercritical pressure steam is periodically injected into the oil pipe; the steam is injected into the oil layer; the supercritical pressure steam is produced by a supercritical pressure steam generator; catalytic visbreaking agent solution is periodically injected into the oil pipe; at last, the solution enters the oil layer; carbon dioxide is periodically injected into the oil pipe and at last, the carbon dioxide enters the oil layer; the horizontal well with the steam, the solution and the carbon dioxide is sealed and braised; and then the well is opened and production is conducted. By the use of the horizontal well thermo-chemical oil extraction method, limitation that steam huff and puff cannot be achieved during ultra-deep thickened oil injection can be solved, so oil layer steam absorbing capability can be greatly improved, steam swept volume is increased and crude oil viscosity is reduced; and crude oil reserved in the ultra-deep thickened oil can be extracted out.
Description
Technical field
The present invention relates to oil extraction in oil field technology, especially a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude.
Background technology
Shengli Oil Field is through the exploration of more than 30 years and the exploitation of more than 20 year, successively in the Dongying Formation of Jiyang Depression, Guantao group, SHAHEJIE FORMATION and the oil reservoir such as the Ordovician system, Cambrian system, find viscous crude, cover oil in place 10.3 hundred million tons, in triumph petroleum-in-place, occupy important proportion.Shengli Viscous Crude Oil proved reserves concentrate buried depth 900 ~ 1600m, account for 92.9% of heavy oil reserves, also have reservoir buried depth in addition in the ultra-deep layer heavy oil reserves 76,660,000 tons of 1600 ~ 2400m.Domestic Karamay, Xinjiang viscous crude buried depth is less than 600 meters, Henan viscous crude mainly concentrates on 130 ~ 450 meters, and Liaohe Oilfield Heavy Crude mainly concentrates between 600 ~ 900m.Super deep-layer heavy crude reservoir buried depth is large, and wellbore heat loss is large, and steam injection pressure is high, and shaft bottom steam quality is low, and conventional steam injection development mode gas oil ratio is low, cannot realize benefit exploitation, need to seek new Technologies For High Efficient Development.
Current published catalytic thinner has a variety of, can carry out effective viscosity reduction to viscous crude.What the present invention applied is have water miscible catalytic thinner.
Summary of the invention
The object of the present invention is to provide a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude, break the conventional steam injection of super deep-layer heavy crude to handle up the constraint that cannot employ, significantly improve oil reservoir vapor absorption capacity, expand steam swept volume, reduce viscosity of crude, the crude oil in super deep-layer heavy crude reservoir is displaced.
In order to reach above-mentioned purpose, present invention employs following technical scheme, a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude, comprises the following steps:
Oil pipe in horizontal well stretches into the step of ultra-deep layer heavy oil tested layer;
Periodically in above-mentioned oil pipe, inject supercritical pressure steam, finally this steam enters the step of above-mentioned oil reservoir, and wherein supercritical pressure steam is produced by supercritical pressure steam generator;
Periodically in above-mentioned oil pipe, inject catalytic viscosity reduction agent solution, finally this solution enters the step of above-mentioned oil reservoir;
Periodically to injecting carbon dioxide in above-mentioned oil pipe, final carbon dioxide enters the step of above-mentioned oil reservoir;
The step of stewing well, be about to be filled with described steam, solution, carbon dioxide horizontal well carry out sealing wait;
The step of opening well and making production.
Described oil pipe adopts overcritical high vacuum insulated tubing, and described overcritical high vacuum insulated tubing must adopt collapse resistance higher than the tubing of overcritical steam injection shaft bottom steam pressure.
The maximum steam injection pressure of described supercritical pressure steam generator can reach 26MPa, can produce the steam that maximum temperature is 390 DEG C, steam (vapor) outlet mass dryness fraction >=75%.
Described catalytic viscosity reduction agent solution be catalytic thinner water-soluble after solution, be a kind of water miscible ionic-liquid catalyst solution.
Described horizontal well is longitudinally positioned in the middle part of oil reservoir, and horizontal section length 150 ~ 200m, well spacing 120 ~ 150m, the thicker well spacing of oil reservoir is less.
Described steam injection speed 7t/h ~ 9t/h, according to the horizontal section length of horizontal well, the cyclic injection amount of steam is every meter of horizontal section length 12 ~ 15t.
Catalytic thinner cyclic injection amount in described catalytic viscosity reduction agent solution is every meter of horizontal section length 0.1 ~ 0.15t.
Described carbon dioxide cyclic injection amount is every meter of horizontal section length 1 ~ 1.5t.
Compared to prior art, the present invention has following beneficial effect:
The present invention can provide a kind of efficient oil production method for the super deep-layer heavy crude reservoir of more than buried depth 1600m, is applicable to more than more than effective thickness 5m, degree of porosity more than 20%, permeability 500 millidarcy, the super deep-layer heavy crude reservoir of oil saturation more than 60%.
Relative to conventional steam injection send in and out, the invention provides a kind of catalytic thinner+carbon dioxide+supercritical steam+horizontal well production method, by the supercritical steam of super critical boiler to horizontal well cyclic injection HTHP, solve ultra-deep layer thick oil filling steam pressure high, conventional steam is handled up the problem of gas injection difficulty.Companion's note catalytic thinner and carbon dioxide simultaneously, wherein water miscible ionic liquid-catalyzed thinner makes viscous crude accelerate catalytic pyrolysis under the hydrothermal condition injecting steam, reduces viscous crude molecular weight, changes molecular conformation, thus reduces viscosity of thickened oil significantly.Carbon dioxide injection stratum expands, and expansion process makes viscous crude fully contact with catalytic thinner, and carbon dioxide is dissolved in crude oil reduction viscosity of crude on a small quantity in addition, and main body onlap forms isolation layer, forms energization layer during back production.Catalytic thinner+carbon dioxide+supercritical steam oil production method works in coordination with viscosity reduction based on catalytic thinner and supercritical steam, carbon dioxide expanded, heat insulation, energization is auxiliary, break the conventional steam injection of super deep-layer heavy crude to handle up the constraint that cannot employ, significantly improve oil reservoir vapor absorption capacity, expand steam swept volume, reduce viscosity of crude, the crude oil in super deep-layer heavy crude reservoir is displaced, thus increases substantially super deep-layer heavy crude reservoir reserves exploitation rate 88.7%.
Detailed description of the invention
Embodiment 1:
A. with 180t/d(ton/sky) speed in the horizontal well of 150m horizontal segment, inject supercritical steam 10 days, steam (vapor) outlet mass dryness fraction >=75%;
B. catalytic thinner is mixed with the solution of 5000mg/L, supercritical steam Injection Level well 10 days in adjoint a step, catalytic thinner solution injection rate 300t/d; It is main that catalytic thinner and supercritical steam work in coordination with viscosity reduction.
C. by carbon dioxide with supercritical steam Injection Level well in a step 1 day, carbon dioxide injection rate 150t/d; Carbon dioxide expanded, heat insulation, energization is auxiliary.
D. stewing well 3 ~ 5 days.
E. opening well and making production, initial stage liquid measure controls at 40m
3/ below d.
Embodiment 2:
A. in the horizontal well of 150m horizontal segment, supercritical steam is injected 10 days, steam (vapor) outlet mass dryness fraction >=75% with the speed of 225t/d;
B. catalytic thinner is mixed with the solution of 5000mg/L, supercritical steam Injection Level well 10 days in companion a, catalytic thinner solution injection rate 450t/d;
C. carbon dioxide to be accompanied in a supercritical steam Injection Level well 1 day, carbon dioxide injection rate 225t/d;
D. stewing well 3 ~ 5 days.
E. opening well and making production, initial stage liquid measure controls at 40m
3/ below d.
Embodiment 3:
A. in the horizontal well of 200m horizontal segment, supercritical steam is injected 10 days, steam (vapor) outlet mass dryness fraction >=75% with the speed of 240t/d;
B. catalytic thinner is mixed with the solution of 6000mg/L, supercritical steam Injection Level well 10 days in companion a, catalytic thinner solution injection rate 400t/d;
C. carbon dioxide to be accompanied in a supercritical steam Injection Level well 1 day, carbon dioxide injection rate 200t/d;
D. stewing well 3 ~ 5 days.
E. opening well and making production, initial stage liquid measure controls at 50m
3/ below d.
Embodiment 4:
A. in the horizontal well of 200m horizontal segment, supercritical steam is injected 10 days, steam (vapor) outlet mass dryness fraction >=75% with the speed of 300t/d;
B. catalytic thinner is mixed with the solution of 6000mg/L, supercritical steam Injection Level well 10 days in companion a, catalytic thinner solution injection rate 500t/d;
C. carbon dioxide to be accompanied in a supercritical steam Injection Level well 1 day, carbon dioxide injection rate 300t/d;
D. stewing well 3 ~ 5 days.
E. opening well and making production, initial stage liquid measure controls at 50m
3/ below d.
In a word, catalytic thinner+carbon dioxide+supercritical steam oil production method works in coordination with viscosity reduction based on catalytic thinner and supercritical steam, carbon dioxide expanded, heat insulation, energization is auxiliary, break the conventional steam injection of super deep-layer heavy crude to handle up the constraint that cannot employ, significantly improve oil reservoir vapor absorption capacity, expand steam swept volume, reduce viscosity of crude, crude oil in super deep-layer heavy crude reservoir is displaced, thus increases substantially super deep-layer heavy crude reservoir reserves exploitation rate 88.7%.
The foregoing is only preferred embodiment of the present invention, be not used to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (8)
1., for a horizontal well thermo-chemical recovery method for super deep-layer heavy crude, comprise the following steps:
Oil pipe in horizontal well stretches into the step of ultra-deep layer heavy oil tested layer;
Periodically in above-mentioned oil pipe, inject supercritical pressure steam, finally this steam enters the step of above-mentioned oil reservoir, and wherein supercritical pressure steam is produced by supercritical pressure steam generator;
Periodically in above-mentioned oil pipe, inject catalytic viscosity reduction agent solution, finally this solution enters the step of above-mentioned oil reservoir;
Periodically to injecting carbon dioxide in above-mentioned oil pipe, final carbon dioxide enters the step of above-mentioned oil reservoir;
The step of stewing well, be about to be filled with described steam, solution, carbon dioxide horizontal well carry out sealing wait;
The step of opening well and making production.
2. a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude according to claim 1, it is characterized in that, described oil pipe adopts overcritical high vacuum insulated tubing, and described overcritical high vacuum insulated tubing must adopt collapse resistance higher than the tubing of overcritical steam injection shaft bottom steam pressure.
3. a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude according to claim 1, it is characterized in that, the maximum steam injection pressure of described supercritical pressure steam generator can reach 26MPa, can produce the steam that maximum temperature is 390 DEG C, steam (vapor) outlet mass dryness fraction >=75%.
4. a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude according to claim 1, is characterized in that, described catalytic viscosity reduction agent solution be catalytic thinner water-soluble after solution, be a kind of water miscible ionic-liquid catalyst solution.
5. a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude according to claim 1, is characterized in that, described horizontal well is longitudinally positioned in the middle part of oil reservoir, and horizontal section length 150 ~ 200m, well spacing 120 ~ 150m, the thicker well spacing of oil reservoir is less.
6. a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude according to claim 1, it is characterized in that, described steam injection speed 7t/h ~ 9t/h, cyclic injection amount is every meter of horizontal section length 12 ~ 15t.
7. a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude according to claim 1, it is characterized in that, the catalytic thinner cyclic injection amount in described catalytic viscosity reduction agent solution is every meter of horizontal section length 0.1 ~ 0.15t.
8. a kind of horizontal well thermo-chemical recovery method for super deep-layer heavy crude according to claim 1, it is characterized in that, described carbon dioxide cyclic injection amount is every meter of horizontal section length 1 ~ 1.5t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054208.1A CN104847321A (en) | 2014-02-18 | 2014-02-18 | Horizontal well thermo-chemical oil extraction method for ultra-deep thickened oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410054208.1A CN104847321A (en) | 2014-02-18 | 2014-02-18 | Horizontal well thermo-chemical oil extraction method for ultra-deep thickened oil |
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| CN201410054208.1A Pending CN104847321A (en) | 2014-02-18 | 2014-02-18 | Horizontal well thermo-chemical oil extraction method for ultra-deep thickened oil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106593368A (en) * | 2016-12-07 | 2017-04-26 | 中国石油天然气股份有限公司 | Pretreatment method for improving SAGD development effect |
| CN107177353A (en) * | 2016-03-11 | 2017-09-19 | 中国石油化工股份有限公司 | A kind of heavy crude thinner and preparation method thereof |
| CN107869336A (en) * | 2016-09-23 | 2018-04-03 | 中国石油化工股份有限公司 | Super-viscous oil chemistry auxiliary thermal recovery improves recovery ratio method |
| CN112761604A (en) * | 2021-01-18 | 2021-05-07 | 栾海涛 | Method for producing hydrogen and displacing oil by injecting supercritical steam and liquid oxygen into super heavy oil |
| CN115387767A (en) * | 2021-05-20 | 2022-11-25 | 中国石油化工股份有限公司 | Steam huff-puff effect-inducing superposition viscosity reducer flooding method for deep extra-heavy oil reservoir |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107177353A (en) * | 2016-03-11 | 2017-09-19 | 中国石油化工股份有限公司 | A kind of heavy crude thinner and preparation method thereof |
| CN107869336A (en) * | 2016-09-23 | 2018-04-03 | 中国石油化工股份有限公司 | Super-viscous oil chemistry auxiliary thermal recovery improves recovery ratio method |
| CN106593368A (en) * | 2016-12-07 | 2017-04-26 | 中国石油天然气股份有限公司 | Pretreatment method for improving SAGD development effect |
| CN112761604A (en) * | 2021-01-18 | 2021-05-07 | 栾海涛 | Method for producing hydrogen and displacing oil by injecting supercritical steam and liquid oxygen into super heavy oil |
| CN115387767A (en) * | 2021-05-20 | 2022-11-25 | 中国石油化工股份有限公司 | Steam huff-puff effect-inducing superposition viscosity reducer flooding method for deep extra-heavy oil reservoir |
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