CN108397172A - The CO of high saturation pressure oil reservoir2Miscible displacement of reservoir method - Google Patents
The CO of high saturation pressure oil reservoir2Miscible displacement of reservoir method Download PDFInfo
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- CN108397172A CN108397172A CN201810237470.8A CN201810237470A CN108397172A CN 108397172 A CN108397172 A CN 108397172A CN 201810237470 A CN201810237470 A CN 201810237470A CN 108397172 A CN108397172 A CN 108397172A
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- reservoir
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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
- E21B43/164—Injecting CO2 or carbonated water
Abstract
The CO of the high saturation pressure oil reservoir of the application2Miscible displacement of reservoir method includes：Reservoir is selected to be more than 80% oil reservoir of initial reservoir pressure with inclination angle and saturation pressure；A bite oil-producing well is bored in the middle high-order bit of oil reservoir construction, decompression exploitation is carried out to oil reservoir；When reservoir pressure is reduced to saturation pressure, natural gas starts that gasoil horizon is released and formed from crude oil, and with crude oil production, when gasoil horizon drops to height value of the perforating site apart from oil-producing well topmost to setting, oil-producing well stops production；A bite gas-producing well is bored at the pneumatic jack that the high-order bit of oil reservoir construction is formed and produces natural gas, reservoir pressure is made to be further reduced to the pressure value of setting, and gas-producing well stops production；A bite injection well, which is bored, in the lower curtate position of oil reservoir construction injects CO2, it opens simultaneously oil-producing well and is produced, CO2Reach mixed phase state with crude oil and realizes the miscible displacement of reservoir.The CO of the application2Miscible displacement of reservoir method can improve the recovery ratio of high saturation pressure oil reservoir, and save production cost.
Description
Technical field
The application belongs to oil reservoir development technical field, specifically, being related to a kind of CO of high saturation pressure oil reservoir2Mixed phase drives
Oily method.
Background technology
Non-phase-mixing driving and mixed phase drive can be divided by improving the gas drive technology of oil reservoir development recovery ratio, best with mixed phase drive effect,
The oil displacement efficiency that theoretically mixed phase drives can reach 100%.Again with CO in mixed phase drive technology2The oil recovery effect that mixed phase drives is most prominent
Go out, most attraction, it can make ultimate recovery reach 90% or more.
Realize CO2Mixed phase drives, and the factor of most critical is exactly that operation pressure or strata pressure are greater than or equal to CO2With stratum
The minimum miscibility pressure of crude oil.However, according at present to the high saturation pressure Reservoir Crude Oil in China and CO2Minimum miscibility pressure is tested
The results show that China's overwhelming majority oil reservoir can not achieve CO since viscosity of crude is higher2Mixed phase drives.Although in injection CO2In plus
CO can be improved by entering partial liquefaction natural gas2But of high cost with the mixed phase ability of in-place oil, dosage is big, can not be widely applied.
Invention content
In view of this, technical problems to be solved in this application are to provide a kind of CO of high saturation pressure oil reservoir2Mixed phase drives
Oily method to improve the recovery ratio of high saturation pressure oil reservoir, and saves production cost.
In order to solve the above-mentioned technical problem, this application discloses a kind of CO of high saturation pressure oil reservoir2Miscible displacement of reservoir method.
Method includes：
Reservoir is selected to be more than 80% oil reservoir of initial reservoir pressure with inclination angle and saturation pressure；
A bite oil-producing well is bored in the middle high-order bit of oil reservoir construction, decompression exploitation is carried out to oil reservoir；When reservoir pressure is reduced to
When saturation pressure, natural gas starts that gasoil horizon is released and formed from crude oil, with crude oil production, when under gasoil horizon
When being down to the perforating site apart from oil-producing well topmost to the height value set, oil-producing well stops production；
A bite gas-producing well is bored at the pneumatic jack that the high-order bit of oil reservoir construction is formed, natural gas is produced, makes reservoir pressure into one
Step is reduced to the pressure value of setting, gas-producing well to stop production；
A bite injection well is bored in the lower curtate position of oil reservoir construction, injects CO2, it opens simultaneously oil-producing well and is produced, CO2With original
Oil reaches mixed phase state, realizes the miscible displacement of reservoir.
Method as described above, it is preferable that in CO2Reach mixed phase state with crude oil, after realizing the miscible displacement of reservoir, further includes：
Calculate the CO under the conditions of prime stratum2Crude oil miscible pressure；
It calculates under different Amplitude of Hypotensive, degassed crude and CO2Miscible pressure, and carried out pair with reservoir pressure after decompression
Than being determined to realize the reservoir pressure fall of mixed phase or nearly mixed phase；
When the speed that analysis gasoil horizon declines is much, is conducive to utilize gravitational differentiation, is sufficiently separated air water；
When analysis gas-water interface and much differences in height of oil-producing well top perforation, water cone not will produce.
The CO of the high saturation pressure oil reservoir of the application2Miscible displacement of reservoir method includes：Reservoir is selected to carry inclination angle and saturation pressure
Power is more than 80% oil reservoir of initial reservoir pressure；A bite oil-producing well is bored in the middle high-order bit of oil reservoir construction, oil reservoir is dropped
It presses off and adopts；When reservoir pressure is reduced to saturation pressure, natural gas starts that gasoil horizon is released and formed from crude oil, with
Crude oil production, when gasoil horizon drops to height value of the perforating site apart from oil-producing well topmost to setting, oil-producing well
Stop production；A bite gas-producing well is bored at the pneumatic jack that the high-order bit of oil reservoir construction is formed, natural gas is produced, makes reservoir pressure into one
Step is reduced to the pressure value of setting, gas-producing well to stop production；A bite injection well is bored in the lower curtate position of oil reservoir construction, injects CO2, together
When open oil-producing well produced, CO2Reach mixed phase state with crude oil, realizes the miscible displacement of reservoir.High saturation pressure provided by the present application
The CO of power oil reservoir2Miscible displacement of reservoir method can improve the recovery ratio of high saturation pressure oil reservoir, and save production cost.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 is the CO of the high saturation pressure oil reservoir of the embodiment of the present application2The flow chart of miscible displacement of reservoir method；
Fig. 2 is the CO of the high saturation pressure oil reservoir of the embodiment of the present application2The schematic diagram of miscible displacement of reservoir method；
Fig. 3 is the CO of the embodiment of the present application one2Crude oil miscible pressure status diagram；
Fig. 4 is the CO of the embodiment of the present application two2Crude oil miscible pressure status diagram；
Fig. 5 is the CO of the embodiment of the present application three2Crude oil miscible pressure status diagram.
Specific implementation mode
Presently filed embodiment is described in detail below in conjunction with attached drawing and Zhongyuan Oil Field branch company block embodiment,
Thereby to the application, how applied technology method solves technical problem and reaches the realization process of technical effect to fully understand
And implement according to this.
Fig. 1 is the CO of the high saturation pressure oil reservoir of the embodiment of the present application2The flow chart of miscible displacement of reservoir method, Fig. 2 are this Shens
Please embodiment high saturation pressure oil reservoir CO2The schematic diagram figure of miscible displacement of reservoir method.Referring to fig. 1 and fig. 2, the present embodiment
High saturation pressure oil reservoir CO2Miscible displacement of reservoir method includes the following contents.
S101, selection reservoir are more than 80% oil reservoir of initial reservoir pressure with inclination angle and saturation pressure.
Wherein, reservoir carries the oil reservoir at inclination angle, can be monoclinal structure, anticlinal-structural reservoir.
S102, a bite oil-producing well is bored in the middle high-order bit of oil reservoir construction, decompression exploitation is carried out to oil reservoir；When reservoir pressure drops
When down to saturation pressure, natural gas starts that gasoil horizon is released and formed from crude oil, with crude oil production, when gas and oil circle
When face drops to height value of the perforating site apart from oil-producing well topmost to setting, oil-producing well stops production.
Above-mentioned height value is the height of gas and oil stable interface and oil-producing well topmost perforation that oil reservoir decompression exploitation eventually forms
Degree is poor, and in a particular application, above-mentioned height value according to the pressure drop funnel that is formed during normal production and should avoid gas coning from being formed come true
It is fixed.When carrying out decompression exploitation to oil reservoir, oil production rate cannot be too fast, especially when reservoir pressure is opened less than saturation pressure, natural gas
When beginning separates from crude oil, gasoil horizon should be controlled and slowly declined, the gravitational differentiation given full play under low oil production rate is made
With, so that gas and oil is sufficiently separated, at the pneumatic jack of top formed residual oil it is minimum, the natural bubble being detained in bottom oil layer is most
It is few.
S103, a bite gas-producing well is bored at the pneumatic jack that the high-order bit of oil reservoir construction is formed, produces natural gas, makes reservoir pressure
It is further reduced to the pressure value of setting, gas-producing well stops production.
It is to make more natural gases from crude oil to bore the purpose that a bite gas-producing well produces gas-cap gas in the high portion of oil reservoir construction
It releases, the light components content in crude oil reduces, and is advantageously implemented mixed phase.In a particular application, above-mentioned pressure value can be with
It is preset according to oil reservoir construction and base oil properties, is suitably adjusted in process of production.
S104, a bite injection well is bored in the lower curtate position of oil reservoir construction, injects CO2, it opens simultaneously oil-producing well and is produced, CO2
Reach mixed phase state with crude oil, realizes the miscible displacement of reservoir.
When reservoir pressure is reduced to reasonable level, to meet and CO may be implemented under reservoir pressure2With crude oil mixed phase, or oil
It hides pressure and is not less than CO2The 80% of crude oil miscible pressure is in nearly mixed phase state, in addition, the production of gas-cap gas can be further
Cause gasoil horizon to decline, but should ensure that gas coning will not occur when follow-up oil-producing well opening well and making production.
When injection-production well works at the same time, it is desirable that keep balanced flood or injection to be more than output, gasoil horizon it is stable or slowly on
It rises, will not lead to that gas-coning phenomena occurs in oil-producing well.
Fig. 3 is the CO of the embodiment of the present application2Crude oil miscible pressure status diagram.Refering to what is shown in Fig. 3, in CO2With crude oil
Reach mixed phase state, after realizing the miscible displacement of reservoir, further includes：
Calculate the CO under the conditions of prime stratum2Crude oil miscible pressure；
It calculates under different Amplitude of Hypotensive, degassed crude and CO2Miscible pressure, and carried out pair with reservoir pressure after decompression
Than being determined to realize the reservoir pressure fall of mixed phase or nearly mixed phase；
When the speed that analysis gasoil horizon declines is much, is conducive to utilize gravitational differentiation, is sufficiently separated air water；
When analysis gas-water interface and much differences in height of oil-producing well top perforation, water cone not will produce.
In high saturation pressure oil reservoir decompression recovery process, CO2The relative size of crude oil minimum miscibility pressure and reservoir pressure
Three kinds of situations of change are likely to occur, respectively as shown in Fig. 3, Fig. 4, Fig. 5.Fig. 3 is the CO of the embodiment of the present application one2Crude oil mixed phase
Pressure state schematic diagram.Refering to what is shown in Fig. 3, CO in oil reservoir decompression recovery process2It is long-range that crude oil minimum miscibility pressure reduces rate
Rate, when reservoir pressure is reduced to a certain value, CO are reduced in reservoir pressure2Crude oil minimum miscibility pressure is less than reservoir pressure.
Fig. 4 is the CO of the embodiment of the present application two2Crude oil miscible pressure status diagram.Refering to what is shown in Fig. 4, oil reservoir is depressured recovery process
Middle CO2Crude oil minimum miscibility pressure reduces rate and is more than reservoir pressure reduction rate, but CO2Crude oil minimum miscibility pressure is always
More than reservoir pressure.Fig. 5 is the CO of the embodiment of the present application three2Crude oil miscible pressure status diagram.Refering to what is shown in Fig. 5, oil reservoir
It is depressured CO in recovery process2Crude oil minimum miscibility pressure reduces rate and is less than reservoir pressure reduction rate, with oil reservoir development, most
Small miscible pressure and the difference of strata pressure are increasing, finally cannot achieve mixed phase or nearly mixed phase.
For three cases above, the application proposes two kinds of solutions：If be depressured in recovery process in oil reservoir, in oil
Before hiding pressure reduction to 8MPa, reservoir pressure can reach CO280% or more of crude oil minimum miscibility pressure, then can be real
Existing mixed phase drives or near miscible flooding.If reservoir pressure is less than CO2The 80% of crude oil minimum miscibility pressure, then in CO2Before injection,
First carry out water filling or injection CO2, reservoir pressure is improved to CO280% or more of crude oil minimum miscibility pressure, it is follow-up to realize
CO2Mixed phase or near miscible flooding oil.
In conclusion the CO of the high saturation pressure oil reservoir of the application2Miscible displacement of reservoir method includes：Reservoir is selected to carry inclination angle
And saturation pressure is more than 80% oil reservoir of initial reservoir pressure；A bite oil-producing well is bored in the middle high-order bit of oil reservoir construction, to oil
Tibetan carries out decompression exploitation；When reservoir pressure is reduced to saturation pressure, natural gas starts to release from crude oil and forms gas
Oil interface, with crude oil production, when gasoil horizon drops to the perforating site apart from oil-producing well topmost to the height value set
When, oil-producing well stops production；A bite gas-producing well is bored at the pneumatic jack that the high-order bit of oil reservoir construction is formed, natural gas is produced, makes oil
The pressure value that pressure is further reduced to setting is hidden, gas-producing well stops production；A bite injection well is bored in the lower curtate position of oil reservoir construction,
Inject CO2, it opens simultaneously oil-producing well and is produced, CO2Reach mixed phase state with crude oil, realizes the miscible displacement of reservoir.It is provided by the present application
The CO of high saturation pressure oil reservoir2Miscible displacement of reservoir method can improve the recovery ratio of high saturation pressure oil reservoir, and save production cost.
Several preferred embodiments of the application have shown and described in above description, but as previously described, it should be understood that the application
Be not limited to form disclosed herein, be not to be taken as excluding other embodiments, and can be used for various other combinations,
Modification, and can be in the application contemplated scope, modifications can be made through the above teachings or related fields of technology or knowledge.And this
The modifications and changes that field personnel are carried out do not depart from spirit and scope, then all should be in the application appended claims
Protection domain in.
Claims (2)
1. a kind of CO of high saturation pressure oil reservoir2Miscible displacement of reservoir method, which is characterized in that including：
Reservoir is selected to be more than 80% oil reservoir of initial reservoir pressure with inclination angle and saturation pressure；
A bite oil-producing well is bored in the middle high-order bit of oil reservoir construction, decompression exploitation is carried out to oil reservoir；When reservoir pressure is reduced to saturation
When pressure, natural gas starts that gasoil horizon is released and formed from crude oil, with crude oil production, when gasoil horizon drops to
Perforating site apart from oil-producing well topmost to setting height value when, oil-producing well stops production；
A bite gas-producing well is bored at the pneumatic jack that the high-order bit of oil reservoir construction is formed, natural gas is produced, reservoir pressure is made further to drop
Down to the pressure value of setting, gas-producing well stops production；
A bite injection well is bored in the lower curtate position of oil reservoir construction, injects CO2, it opens simultaneously oil-producing well and is produced, CO2It is reached with crude oil
To mixed phase state, the miscible displacement of reservoir is realized.
2. according to the method described in claim 1, it is characterized in that, in CO2Reach mixed phase state with crude oil, realizes the miscible displacement of reservoir
Afterwards, further include：
Calculate the CO under the conditions of prime stratum2Crude oil miscible pressure；
It calculates under different Amplitude of Hypotensive, degassed crude and CO2Miscible pressure, and compared, determined with reservoir pressure after decompression
It can realize the reservoir pressure fall of mixed phase or nearly mixed phase；
When the speed that analysis gasoil horizon declines is much, is conducive to utilize gravitational differentiation, is sufficiently separated air water；
When analysis gas-water interface and much differences in height of oil-producing well top perforation, water cone not will produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810237470.8A CN108397172B (en) | 2018-03-22 | 2018-03-22 | CO of high saturation pressure reservoir2Miscible flooding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810237470.8A CN108397172B (en) | 2018-03-22 | 2018-03-22 | CO of high saturation pressure reservoir2Miscible flooding method |
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| CN108397172A true CN108397172A (en) | 2018-08-14 |
| CN108397172B CN108397172B (en) | 2020-07-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779581A (en) * | 2019-01-17 | 2019-05-21 | 中国石油天然气股份有限公司 | A kind of high miscible pressure oil reservoir realization carbon dioxide mixed phase drive method |
| CN110541693A (en) * | 2019-08-29 | 2019-12-06 | 中国石油化工股份有限公司 | CO2 flooding composite development method for low-permeability thick-layer sandstone oil reservoir |
| CN111927447A (en) * | 2020-07-09 | 2020-11-13 | 西南石油大学 | Bubble point pressure testing method and device for underground high-pressure water sample |
| CN115935674A (en) * | 2022-12-20 | 2023-04-07 | 中国石油大学(北京) | Based on CO 2 Multiphase band discrimination method for time-space change characteristics of reservoir displacement fluid |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124471A2 (en) * | 2006-04-21 | 2007-11-01 | Terry Kelley | Enhanced liquid hydrocarbon recovery by miscible gas water drive |
| CN102337874A (en) * | 2011-09-07 | 2012-02-01 | 西南石油大学 | Method for reducing minimum miscible phase pressure between CO2 and crude oil of miscible phase displacement |
| CN104453804A (en) * | 2014-10-17 | 2015-03-25 | 中国海洋石油总公司 | Dynamic monitoring and evaluating method for gas-drive reservoir development |
| CN205297522U (en) * | 2015-12-22 | 2016-06-08 | 中国石油天然气股份有限公司 | Well pattern structure |
| CN106837269A (en) * | 2017-03-03 | 2017-06-13 | 中国石油大学(北京) | Low, the extra-low permeability oil reservoirs CO of one kind2Drive nearly miscible pressure area determination method |
| CN107366526A (en) * | 2017-07-25 | 2017-11-21 | 中国石油天然气股份有限公司 | A kind of screening technique for the compact oil reservoir that suitable carbon dioxide mixed phase drives |
| CN107435535A (en) * | 2016-05-26 | 2017-12-05 | 中国石油大学(北京) | A kind of method that exploitation high dip angle heavy crude reservoir is driven using plane gravity |
-
2018
- 2018-03-22 CN CN201810237470.8A patent/CN108397172B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007124471A2 (en) * | 2006-04-21 | 2007-11-01 | Terry Kelley | Enhanced liquid hydrocarbon recovery by miscible gas water drive |
| CN102337874A (en) * | 2011-09-07 | 2012-02-01 | 西南石油大学 | Method for reducing minimum miscible phase pressure between CO2 and crude oil of miscible phase displacement |
| CN104453804A (en) * | 2014-10-17 | 2015-03-25 | 中国海洋石油总公司 | Dynamic monitoring and evaluating method for gas-drive reservoir development |
| CN205297522U (en) * | 2015-12-22 | 2016-06-08 | 中国石油天然气股份有限公司 | Well pattern structure |
| CN107435535A (en) * | 2016-05-26 | 2017-12-05 | 中国石油大学(北京) | A kind of method that exploitation high dip angle heavy crude reservoir is driven using plane gravity |
| CN106837269A (en) * | 2017-03-03 | 2017-06-13 | 中国石油大学(北京) | Low, the extra-low permeability oil reservoirs CO of one kind2Drive nearly miscible pressure area determination method |
| CN107366526A (en) * | 2017-07-25 | 2017-11-21 | 中国石油天然气股份有限公司 | A kind of screening technique for the compact oil reservoir that suitable carbon dioxide mixed phase drives |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109779581A (en) * | 2019-01-17 | 2019-05-21 | 中国石油天然气股份有限公司 | A kind of high miscible pressure oil reservoir realization carbon dioxide mixed phase drive method |
| CN110541693A (en) * | 2019-08-29 | 2019-12-06 | 中国石油化工股份有限公司 | CO2 flooding composite development method for low-permeability thick-layer sandstone oil reservoir |
| CN110541693B (en) * | 2019-08-29 | 2021-09-28 | 中国石油化工股份有限公司 | Low permeability thick sandstone reservoir CO2Driving and drainage composite development method |
| CN111927447A (en) * | 2020-07-09 | 2020-11-13 | 西南石油大学 | Bubble point pressure testing method and device for underground high-pressure water sample |
| CN111927447B (en) * | 2020-07-09 | 2022-02-01 | 西南石油大学 | Bubble point pressure testing method and device for underground high-pressure water sample |
| CN115935674A (en) * | 2022-12-20 | 2023-04-07 | 中国石油大学(北京) | Based on CO 2 Multiphase band discrimination method for time-space change characteristics of reservoir displacement fluid |
| CN115935674B (en) * | 2022-12-20 | 2024-03-12 | 中国石油大学(北京) | Based on CO 2 Multiphase zone discrimination method for space-time change characteristics of oil displacement reservoir fluid |
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