CN104533368A - Application of in-situ combustion flue gas to oil deposit exploitation and system - Google Patents
Application of in-situ combustion flue gas to oil deposit exploitation and system Download PDFInfo
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- CN104533368A CN104533368A CN201410808239.1A CN201410808239A CN104533368A CN 104533368 A CN104533368 A CN 104533368A CN 201410808239 A CN201410808239 A CN 201410808239A CN 104533368 A CN104533368 A CN 104533368A
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- flue gas
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- injection
- gas
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/168—Injecting a gaseous medium
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention provides an application of in-situ combustion flue gas to oil deposit exploitation and a system. According to oil deposit exploitation, the flue gas generated by in-situ combustion is reinjected into an adjacent oil reservoir of the in-situ combustion to achieve gas driving of the oil reservoir. Equipment at least comprises a fireflooding oil reservoir and a steam injection oil reservoir. The flue gas down-hole reinjection system comprises a casing pipe (21), a gas injection perforating pipe (22) and an oil-extraction oil pipe (23), wherein the gas injection perforating pipe (22) and the oil-extraction oil pipe (23) are arranged in the casing pipe side by side. A one-way valve (29) is arranged at the position, opposite to the bottom of the in-situ combustion, of the gas injection perforating pipe, and a hole (210) is formed in the position, opposite to the steam injection oil reservoir, of the gas injection perforating pipe. A gas-liquid separator (28) is arranged at the position, opposite to the bottom of the in-situ combustion, of the oil-extraction oil pipe. According to the application and the system, effective utilization of the flue gas is ensured, and the ground treatment and reinjection process is simplified; a flue gas injection target oil reservoir is effectively controlled, and therefore the production safety in the air injection process is ensured; due to oil reservoir flue gas driving, the recovery ratio of a heavy oil reservoir is increased, and the emission of greenhouse gas and poisonous gas is reduced.
Description
Technical field
This method belongs to oil extraction in oil field technical field, in particular to the application of a kind of combustion in situ flue gas in oil reservoir exploitation and system, improve well yield, increase oil reservoir heat utilization rate, reduce flue gas to atmosphere pollution, improve recovery ratio and the development effectiveness of heavy crude reservoir.
Background technology
Domestic thickened oil recovery is based on steam injection development, and a large amount of block is in poor efficiency mining phase at present.Situ combustion technology owing to having Pintsch process upgrading, heating, viscosity reducing improves the advantages such as crude oil flow ability, the high and low power consumption of oil displacement efficiency, is considered to most potential substituted technique, current year produce oil arrived 200,000 tons.Combustion in situ has burnt the heavy component of in crude oil about 10%, and output 1 side oil is by simultaneously by generation 1000 ~ 3000 side flue gas, and in gas, nitrogen, carbon dioxide, methane, hydrogen sulfide proportion have exceeded 99%.Wherein sour gas accelerates the corrosion of flow string and ground installation, and the discharge of greenhouse gases and toxic gas, brings immense pressure to oil field surrounding enviroment simultaneously.
Current flue gas can be used as a kind of good oil displacement agent, can supplement the stratum energy of later stage deficit of handling up on a large scale, and has solubilising, viscosity reduction, intensifying distillation, the effect of expansion swept volume.When flue gas and steam flooding are for when acting on simultaneously, the impact scope of steam can be strengthened, change the trend of steam, improve the object of Heavy Oil Thermal Recovery Effect.US Patent No. 3675715A discloses a kind of method of flue gas re-injection, under then extraction is entered by surface compressor re-injection in extraction flue gas place oil well, realizes underground flue gas drive.But this ground needs configuration High-Pressure Compressor and re-injection pipeline, and oil-recovery operations cost is corresponding raising also, and re-injection device in ground will occupy more ground space simultaneously.
This invention ensures that flue gas effectively utilizes, simplify floor treatment and re-injection flow process, achieve combustion in situ extraction industry down-hole and be separated and the re-injection of underground flue gas.A kind of combustion in situ rear pass gas Application way, the flue gas produced after combustion in situ, by the adjacent oil reservoir of producing well re-injection, this stratum energy supplementary realizes flue gas on the spot and assists the displacement of reservoir oil.
Summary of the invention
One object of the present invention is to provide the application of a kind of combustion in situ flue gas in oil reservoir exploitation;
Another object of the present invention is to provide a kind of method utilizing combustion in situ flue gas to exploit oil reservoir; The inventive method adopts Oil/gas Well lower point of defeated technique, realizes the re-injection on the spot of down-hole flue gas.Its re-injection mode ensure that effective utilization of flue gas, simplifies floor treatment and re-injection flow process.Effectively can control flue gas steam injection target oil reservoir, and ensure that production safety in air injection process.Oil reservoir flue gas flooding improves recovery factor of heavy oil reservoir, lowers greenhouse gases and toxic gas discharge.
Another object of the present invention is to provide a kind of stratified deposit exploitation equipment; Equipment of the present invention is made up of flow string, gas injection tube column, packer, monitoring system four part, achieves flue gas and is separated with Produced Liquid underground and re-injection on the spot.
For reaching above-mentioned purpose, on the one hand, the invention provides the application of a kind of combustion in situ flue gas in oil reservoir exploitation, described oil reservoir exploitation is the flue gas produced by combustion in situ is recycled into combustion in situ adjacent oil reservoir by down-hole re-injection system, realizes oil reservoir flue gas flooding.
According to application of the present invention, wherein preferred described oil reservoir is stratified deposit, and interlayer interlayer is grown;
Described each layer by layer between closure good; Flue gas cannot break through interlayer and rise to interlayer top.
According to application of the present invention, wherein preferred described oil reservoir is heavy crude reservoir;
Wherein more preferably described oil reservoir is the heavy crude reservoir of 500-50000 centipoise.
According to application of the present invention, wherein preferred described oil reservoir at least comprises one deck fireflood oil reservoir and one deck steam injection oil reservoir.
Described steam injection oil reservoir is well known to those skilled in the art, such as is the oil reservoir of steam soak or steam driving exploitation.
On the other hand, present invention also offers a kind of method utilizing fireflood oil reservoir flue gas to exploit oil reservoir, described oil reservoir is stratified deposit, wherein at least comprises one deck fireflood oil reservoir and one deck steam injection oil reservoir, and the oil of combustion in situ extraction and flue gas utilize two casing strings in producing well to divide defeated; Upgrading oil is by sucker rod pump extraction, and flue gas is by independent underground gas injection pipe column re-injection steam injection oil reservoir; Wherein, combustion in situ producing well bottom pressure is at least greater than more than the operating pressure 1MPa of steam injection oil reservoir.
According to method of the present invention, wherein, the further preferably combustion in situ producing well bottom pressure of the present invention is greater than the operating pressure 1 ~ 1.5MPa of steam injection oil reservoir.
Flue gas flooding can supplement the stratum energy of later stage deficit of handling up on a large scale, and has solubilising, viscosity reduction, intensifying distillation, the effect of expansion swept volume.When flue gas and steam flooding are for when acting on simultaneously, by improving the well yield of steam injection oil reservoir producing well, improve Heavy Oil Thermal Recovery Effect.
According to method of the present invention, wherein preferred layered reservoir layer wall is grown; Described each layer by layer between closure good;
According to method of the present invention, wherein preferred described oil reservoir is heavy crude reservoir;
Wherein be more preferably the heavy crude reservoir of 500-50000 centipoise.
According to method of the present invention, described oil reservoir adopts double-deck or multilayer well pattern exploitation;
According to method of the present invention, preferably straight well well pattern wherein adopts 5 points, anti-7 points, anti-or row well pattern at 9.
Under adopting this kind of well pattern pattern, the well pattern pattern of the injection of a bite well, many mouthfuls of well extraction can be realized, the effect of flue gas flooding can better be played.
According to method of the present invention, combustion in situ and steam injection oil reservoir are adjacent oil reservoir;
Wherein be understandable that, when steam injection oil reservoir is positioned at above combustion in situ, be more conducive to making full use of of flue gas.
If when wherein steam injection oil reservoir is positioned at below combustion in situ, pressuring method even can be used flue gas to be recycled in steam injection oil reservoir.
Wherein preferred described combustion in situ adopts independent well pattern.
Wherein further preferred adjacent Injection Well and producing well are 50 ~ 200m well pattern.
Up and down respectively with two cover well pattern exploitations, above interlayer, oil reservoir utilizes steam injection technology to develop, and below interlayer, oil reservoir utilizes and burns technological development.
Baked wheaten cake gas injection well wherein can conventionally operate by conventional gas injection well of burning, such as can be air injection straight well;
With 10000 ~ 40000m in a preferred embodiment of the invention by ground high pressure air injection pump
3/ d speed injects air to oil reservoir;
Wherein the present invention can also preferred described combustion in situ to inject pressure after air be 4MPa.
Can be wherein the conventional re-injection operation of prior art by flue gas re-injection steam injection oil reservoir, such as flue gas enter oil reservoir by burning the direct re-injection of producing well; For realizing the flue gas flooding of lasting steam injection oil reservoir, combustion in situ producing well bottom pressure is at least greater than more than the operating pressure 1MPa of steam injection oil reservoir, to maintain enough pressure reduction, ensures that flue gas injects exploitation via steam injection oil reservoir smoothly;
Specifically for example can two casing strings be utilized to divide oil and flue gas defeated; Upgrading oil is by sucker rod pump extraction, and flue gas can pass through independently gas injection tube column re-injection steam injection oil reservoir;
Wherein the producing well of the present invention's also preferred combustion in situ adopts separating treatment technique under Oil/gas Well, and utilize two casing strings to divide defeated, the sucker rod pump extraction liquid of resistance to 200 DEG C of high temperature, flue gas directly injects adjacent oil reservoir by another set of tubing string.
Wherein the present invention also preferred well head monitor output oxygen content gas when being elevated to 6%, stop this producing well production fluid and flue gas re-injection.
When live wire arrives near producing well, well head monitors the warning line that output oxygen content gas can be elevated to 6% gradually, for ensureing production safety and avoiding air re-injection, stops this producing well production fluid and flue gas re-injection.
Another aspect, the present invention have also been devised a kind of combustion in situ flue gas down-hole re-injection system, described combustion in situ flue gas down-hole re-injection system comprises sleeve pipe 21, the oil recovery oil pipe 23 arranged in sleeve pipe, the gas injection perforated pipe 22 of down-hole flue gas re-injection, prevents flue gas from spilling into separator 24 and the monitoring system 26 of earth's surface and combustion in situ from steam injection layer; Described gas injection perforated pipe 22 and oil recovery oil pipe 23 be arranged in parallel; In oil recovery oil pipe, 23 are arranging gas-liquid separator 28 and sucker rod pump 27 relative to the position bottom combustion in situ; Gas injection perforated pipe 22 arranges perforate 210 in the position, place, bottom 1/3 relative to steam injection oil reservoir, and arranges the valve 29 that control flue gas enters gas injection perforated pipe in the position relative to combustion in situ.
According to combustion in situ flue gas down-hole of the present invention re-injection system, be wherein understandable that, after sleeve pipe places in oil reservoir, perforated zone 10 should be formed at target oil layer section.
According to combustion in situ flue gas down-hole of the present invention re-injection system, wherein the inherent exploitation via steam injection oil reservoir upper and lower of preferred described sleeve pipe arranges packer 24.Can prevent flue gas from missing to other layer of position (spill into earth's surface from steam injection layer, or spill into combustion in situ from steam injection layer) like this, and prevent combustion in situ 7 Produced Liquid from recharging to steam injection oil reservoir 2.
According to combustion in situ flue gas down-hole of the present invention re-injection system, wherein preferred described valve 29 is one way valve;
Wherein said one way valve can control flue gas and enter re-injection tubing string.
According to combustion in situ flue gas down-hole of the present invention re-injection system, wherein the position of steam injection perforated pipe 22 relative to 1m place bottom combustion in situ can also be set preferred described one way valve 29.
According to combustion in situ flue gas down-hole of the present invention re-injection system, described gas-liquid separator 28 is arranged on bottom oil recovery oil pipe 23, and the external diameter of gas separator 28 equals the external diameter of oil recovery oil pipe 23.
According to combustion in situ flue gas down-hole of the present invention re-injection system, wherein in preferred described gas injection perforated pipe, gas flowmeter 25 is set.
According to combustion in situ flue gas down-hole of the present invention re-injection system, wherein in preferred described sleeve pipe, temperature and pressure tester 26 is also set.
Wherein preferred described temperature and pressure tester is arranged on bottom producing zone position.
According to combustion in situ flue gas down-hole of the present invention re-injection system, wherein in preferred described oil recovery oil pipe, sucker rod pump 27 is set.
Sucker rod pump of the present invention can be any sucker rod pump of prior art, the present invention is gas-tight and sand-preventing pump preferably, the down-hole separation of gas, liquid, sand can be carried out, play and eliminate or alleviate gas and shake out on the impact of oil well pump, improve the effect of pump efficiency and pumping efficiency.
In sum, the invention provides a kind of combustion in situ flue gas oil reservoir exploitation in application and system.Technical scheme tool of the present invention has the following advantages:
1) production effect is good: the present invention arranges down-hole gas-liquid and divides defeated tubing string, achieve the extraction flue gas adjacent oil reservoir of re-injection on the spot, supplementary flue gas adds stratum energy, and flue gas gas drive auxiliary steam is produced simultaneously, solubilization, viscosity reduction, intensifying distillation effect obviously, improve oil output per well;
2) environmental friendliness: extraction atmospheric carbon dioxide re-injection on the spot after combustion in situ, reduces greenhouse gas emission.Toxic gas sulfur dioxide reinjection into reservoir simultaneously, ground air quality is obviously improved;
3) flue gas re-injection system safety is controlled: be provided with one way valve bottom flue gas re-injection tubing string, can need to close re-injection system according to production and safety;
4) reduce cost: reduce sour gas to tube corrosion, flow string increases service life.The re-injection on the spot of toxic gas sulfur dioxide simultaneously, after filtration underground absorption, its content reduces greatly, decreases ground desulfurizing device and drops into.The present invention utilizes stratum self-energy, without the need to floor treatment and ground re-injection system, has effect of safety, energy-saving and environmental protection.
Accompanying drawing explanation
Fig. 1, combustion in situ flue gas re-injection method schematic diagram;
Fig. 2, novel combustion in situ flue gas re-injection system schematic diagram;
In Fig. 1: 1 burns gas injection straight well, 2 steam technologies exploitation oil reservoir (steam injection oil reservoir), 3 interlayers, 4 burn burned region, 5 producing wells (handling up or steam flooding), 6 burn band, 7 baked wheaten cake technology exploitation oil reservoir (combustion in situ), 8 burn producing well, 9 flue gas flooding regions, 10 perforated zone.
In Fig. 2: 2 steam technologies exploitation oil reservoir (steam injection oil reservoir), 7 burn technology exploitation oil reservoir (combustion in situ), 3 interlayers, 21 sleeve pipes, 22 gas injection perforated pipes, 23 oil recovery oil pipes, 24 packers, 25 gas flowmeters, 26 temperature and pressure testers, 27 sucker rod pumps, 28 gas-liquid separators, 29 one way valves, 210 perforates, 10 perforated zone.
Detailed description of the invention
Describe the beneficial effect of implementation process of the present invention and generation below by way of specific embodiment in detail, be intended to help reader to understand essence of the present invention and feature better, not as can the restriction of practical range to this case.
Embodiment 1
Below in conjunction with accompanying drawing 1, combustion in situ flue gas re-injection method of the present invention is described in detail.In figure, oil reservoir 2 and 7 is divided into the independent well pattern of two covers by interlayer 3, and interlayer closure is good, and flue gas cannot break through interlayer and rise to interlayer top.Up and down respectively with two cover well pattern exploitations, above interlayer, oil reservoir utilizes steam injection technology to develop, and below interlayer, oil reservoir utilizes and burns technological development.Burning gas injection straight well 1 is air injection straight well, by ground high pressure air injection pump with 10000 ~ 40000m
3/ d speed injects air to oil reservoir 7.After oil reservoir 7 injects air, pressure is 4MPa, and combustion zone 6 advances to baked wheaten cake producing well 8 with the speed of 3 ~ 10cm/d every day, and combustion zone 6 rear is for burning burned region, and in district, residual oil saturation is close to 0.Combustion in situ has burnt the heavy component of in crude oil about 10%, and output 1 side oil is by simultaneously by generation 1000 ~ 3000 side flue gas, and in gas, nitrogen, carbon dioxide, methane, hydrogen sulfide proportion have exceeded 99%.Upgrading oil and flue gas realize gas-liquid in baked wheaten cake producing well shaft bottom and divide defeated, upgrading oil is by sucker rod pump extraction, flue gas enters oil reservoir 2 (concrete re-injection tubular column structure is shown in Fig. 2), generation flue gas region, producing well 8 near wellbore zone 9 by burning the direct re-injection of producing well 8.Can exploit in the mode of steam soak or steam flooding in oil reservoir 2, in manufacturing process, oil reservoir 2 stratum average pressure is less than oil reservoir 7 average pressure 1 ~ 1.5MPa, and reasonable operation pressure limit is conducive to flue gas in oil reservoir 7 and is injected into oil reservoir 2, and to prevent in oil reservoir 2 Liquid return filling in oil reservoir 7.Flue gas flooding can supplement the stratum energy of later stage deficit of handling up on a large scale simultaneously, and has solubilising, viscosity reduction, intensifying distillation, the effect of expansion swept volume.When flue gas and steam flooding are for when acting on simultaneously, by improving the well yield of oil reservoir 2 li of producing wells, improve Heavy Oil Thermal Recovery Effect.
Below in conjunction with accompanying drawing 2, combustion in situ rear pass gas re-injection system of the present invention is described in detail.Re-injection producing well is made up of the oil pipe 23 that recovers the oil, gas injection perforated pipe 22, packer 24, monitoring system (temperature and pressure tester) four parts.First at sleeve pipe 21 at target oil layer section perforation, form perforated zone 10, burn upgrading oil and can enter oil recovery oil pipe 23 by sleeve pipe 21 in oil reservoir 7, extraction flue gas is divided and is transported to gas injection perforated pipe 22 and then enter oil reservoir 2.Oil recovery oil pipe 23 is rotproofness oil pipe, and gas-liquid separator 28 is arranged on bottom oil recovery oil pipe 23, and the external diameter of gas separator 28 equals the external diameter of oil recovery oil pipe 23, and the sucker rod pump 27 for high-temp liquid output is housed above vapour liquid separator 28.Oil is lifted to ground by sucker rod pump (gas prevention pump) 27, and sucker rod pump can resistance to 200 DEG C of high temperature, and bottom is installed underground gas-liquid separator 28 and realized down-hole gas-liquid separation, improves the lifting efficiency of high gas-liquid ratio producing well.Gas injection perforated pipe 22 is provided with flue gas flow passage in target oil reservoir 2 depth segment, and bottom controls for being provided with the one way valve 29 that flue gas enters re-injection tubing string, when needs stop flue gas re-injection operation, and can closing one-way valve 29.Be provided with gas flowmeter 25 in gas injection perforated pipe 22, flue gas re-injection speed carries ground by signal acquiring system.Oil reservoir 2 is effectively entered for making flue gas, packer 24 is installed on steam injection oil reservoir 2 upper and lower respectively, prevent gas loss to other layer of position, and prevent baked wheaten cake technology exploitation oil reservoir 7 Produced Liquid from recharging to steam injection oil reservoir, packer 24 leaves the passage passed for temperature and pressure signal cable.Temperature, pressure change in pit shaft monitored by temperature and pressure tester 26, when monitoring baked wheaten cake leading edge and being about to be advanced near producing well, stops upgrading oil extraction and flue gas re-injection operation in good time.
Claims (10)
1. the application of combustion in situ flue gas in oil reservoir exploitation, is characterized in that, described oil reservoir exploitation is the flue gas produced by combustion in situ is recycled into combustion in situ adjacent oil reservoir by down-hole re-injection system, realizes oil reservoir flue gas flooding.
2. application according to claim 1, is characterized in that, described oil reservoir is stratified deposit, wherein at least comprises one deck combustion in situ and one deck steam injection oil reservoir, and interlayer interlayer is grown; Wherein preferred described oil reservoir is heavy crude reservoir; Be more preferably the heavy crude reservoir of 500-50000 centipoise.
3. utilize combustion in situ flue gas to exploit a method for oil reservoir, it is characterized in that, described oil reservoir is stratified deposit, wherein at least comprises one deck fireflood oil reservoir and one deck steam injection oil reservoir; The oil of combustion in situ extraction and flue gas utilize two casing strings in producing well to divide defeated; Upgrading oil is by sucker rod pump extraction, and flue gas is by independent underground gas injection pipe column re-injection steam injection oil reservoir; Wherein, combustion in situ producing well bottom pressure is at least greater than more than the operating pressure 1MPa of steam injection oil reservoir.
4. method according to claim 3, is characterized in that, layered reservoir layer wall is grown; Wherein preferred described oil reservoir is heavy crude reservoir; Be more preferably the heavy crude reservoir of 500-50000 centipoise.
5. method according to claim 3, is characterized in that, described oil reservoir adopts double-deck or multilayer well pattern exploitation; Straight well well pattern can adopt 5 points, anti-7 points, anti-or row well pattern at 9.
6. method according to claim 3, is characterized in that, described combustion in situ and the steam injection displacement of reservoir oil all adopt independent well pattern; Preferred combustion in situ and steam injection oil reservoir are adjacent oil reservoir.
7. a combustion in situ flue gas down-hole re-injection system, it is characterized in that, described combustion in situ flue gas down-hole re-injection system comprises sleeve pipe (21), the oil recovery oil pipe (23) arranged in sleeve pipe, the gas injection perforated pipe (22) of down-hole flue gas re-injection, prevents flue gas from missing separator (24) to other layer of position and monitoring system (26); Described gas injection perforated pipe (22) and oil recovery oil pipe (23) be arranged in parallel; In oil recovery oil pipe, (23) are arranging gas-liquid separator (28) and sucker rod pump (27) relative to the position bottom combustion in situ; Gas injection perforated pipe (22) arranges perforate (210) in the position, place, bottom 1/3 relative to steam injection oil reservoir, and the valve (29) that control flue gas enters gas injection perforated pipe is set in the position relative to combustion in situ, preferred described valve (29) is one way valve, is also provided with the gas flowmeter (25) for gas-monitoring in preferred steam injection perforated pipe.
8. combustion in situ flue gas down-hole according to claim 7 re-injection system, it is characterized in that, described gas-liquid separator (28) is arranged on oil recovery oil pipe (23) bottom, and the external diameter of gas separator (28) equals the external diameter of oil recovery oil pipe (23).
9. combustion in situ flue gas down-hole according to claim 7 re-injection system, is characterized in that, described one way valve (29) arranges the position of steam injection perforated pipe (22) relative to 1m place bottom combustion in situ.
10. combustion in situ flue gas down-hole according to claim 7 re-injection system, it is characterized in that, described packer (24) is installed on steam injection oil reservoir (2) upper and lower respectively.
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| CN106368662A (en) * | 2015-07-23 | 2017-02-01 | 中国石油天然气股份有限公司 | Evaluation method for recovery ratio |
| CN106499371A (en) * | 2015-09-06 | 2017-03-15 | 中国石油天然气股份有限公司 | A kind of standing column well gas injection improves the method and device of Condensate Gas Reservoir recovery ratio |
| CN107339089A (en) * | 2017-09-13 | 2017-11-10 | 北京军秀咨询有限公司 | A kind of combustion in situ slug adds the method that steam drives combined type crude oil producing |
| CN107965304A (en) * | 2018-01-20 | 2018-04-27 | 西安石油大学 | A kind of method to exploiting multilayer heavy crude reservoir to fireflood |
| CN113833444A (en) * | 2020-06-23 | 2021-12-24 | 中国石油天然气股份有限公司 | Fire burning exploitation method for thin-layer and deep-layer original heavy oil reservoir |
| CN113944450A (en) * | 2020-07-15 | 2022-01-18 | 中国石油化工股份有限公司 | Oil extraction method for single-layer fire flooding and multi-layer heating production of multi-layer heavy oil reservoir |
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| CN107965304A (en) * | 2018-01-20 | 2018-04-27 | 西安石油大学 | A kind of method to exploiting multilayer heavy crude reservoir to fireflood |
| CN113833444A (en) * | 2020-06-23 | 2021-12-24 | 中国石油天然气股份有限公司 | Fire burning exploitation method for thin-layer and deep-layer original heavy oil reservoir |
| CN113833444B (en) * | 2020-06-23 | 2023-08-22 | 中国石油天然气股份有限公司 | Fire exploitation method of thin layer and deep layer original heavy oil reservoir |
| CN113944450A (en) * | 2020-07-15 | 2022-01-18 | 中国石油化工股份有限公司 | Oil extraction method for single-layer fire flooding and multi-layer heating production of multi-layer heavy oil reservoir |
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