CN106285582A - Note CO2oil reservoirs CO2mixed phase region decision method - Google Patents
Note CO2oil reservoirs CO2mixed phase region decision method Download PDFInfo
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- CN106285582A CN106285582A CN201610825109.8A CN201610825109A CN106285582A CN 106285582 A CN106285582 A CN 106285582A CN 201610825109 A CN201610825109 A CN 201610825109A CN 106285582 A CN106285582 A CN 106285582A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003921 oil Substances 0.000 claims abstract description 62
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 239000010779 crude oil Substances 0.000 claims abstract description 7
- 238000004088 simulation Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 238000011160 research Methods 0.000 abstract description 7
- 238000011156 evaluation Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003068 static effect 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
- E21B43/164—Injecting CO2 or carbonated water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses note CO2Oil reservoirs CO2Mixed phase region decision method, carries out meticulous pool description to target reservoir, sets up oil reservoir detailed geological model；Carry out target reservoir numerical simulation study, obtain formation pressure distribution characteristics plate, oil reservoir CO2Saturation distribution feature plate；By long slim tube driving test, measure target reservoir CO2Minimum miscibility pressure with crude oil；Judge note CO2Oil reservoirs CO2Mixed phase region.Step of the present invention is clear, and application simplicity, for carrying out hyposmosis (fine and close) oil reservoir injection CO2Mechanism of oil displacement and note CO2Drive raising recovery efficiency technique research and provide a set of judgement and evaluation standard scientific and reasonable, reliable.Not only can determine whether whether oil reservoir belongs to mixed phase and drive, and can determine whether in oil reservoir, whether region to be evaluated is mixed phase area type, it is also possible to instruct hyposmosis (fine and close) oil reservoir injection CO2Driving and carry out corresponding development strategy research, popularizing application prospect of the present invention is wide, remarkable economic and social benefits.
Description
Technical field
The present invention relates to note CO2Drive raising oil recovery factor research field, specifically note CO2Oil reservoirs CO2Mixed phase region is sentenced
Disconnected method.
Background technology
In whole world injection gas displacement project, CO2Mixed phase drives and accounts for 53.9%, and notes CO at 1242In displacement of reservoir oil project, mixed phase drives
Have 108.Visible CO2Can be people's very concerns with crude oil mixed phase in oil displacement process, even someone regards it
For CO2Drive the key of win or lose.Therefore, CO is being determined2It is whether that mixed phase drives one will be had clearly to recognize to it during displacement of reservoir oil project
Know.At present, at CO2In displacement of reservoir oil project, mixed phase region typically uses following methods to make a distinction: (1) if the oil reservoir moment to be evaluated
Valency regional stratum pressure is more than oil reservoir minimum miscibility pressure (MMP), then this moment of oil reservoir region to be evaluated is mixed phase region；(2)
If oil reservoir minimum miscibility pressure (MMP) is less than oil reservoir original formation pressure, then judge that oil reservoir is that mixed phase drives or thinks that oil reservoir is whole
Body is mixed phase region.It can be seen that said method only considers pressure factor, and it is not concerned with whether evaluation region has CO2Feed through to,
After wherein second method also have ignored oilfield gas injection exploitation, strata pressure field will occur great change and to mixed phase shape
The impact of state, thus there is significant deficiency in current determination methods.In order to whether convenient, efficient, scientific and reasonable judges oil reservoir
Achieving mixed phase to drive, or judge in oil reservoir, which region whether be mixed phase region, through exploring, the present invention proposes utilization oil
Tibetan mixed phase drives discriminant criterion and judges to note CO2Oil reservoirs CO2The method in mixed phase region.
Summary of the invention
It is an object of the invention to provide that step is clear, it is easy, scientific and reasonable to apply, note CO reliably2Oil reservoirs CO2Mixed
Alpha region determination methods, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
Note CO2Oil reservoirs CO2Mixed phase region decision method, comprises the following steps:
(1) target reservoir is carried out meticulous pool description, set up oil reservoir detailed geological model；
(2) on the basis of step (1), carry out target reservoir numerical simulation study, obtain formation pressure distribution characteristics plate, oil
Layer CO2Saturation distribution feature plate；
(3) by long slim tube driving test, target reservoir CO is measured2Minimum miscibility pressure (MMP) with crude oil；
(4) formation pressure distribution characteristics plate, the oil reservoir CO obtained in step (2) is utilized2Saturation distribution feature plate and step
Suddenly the minimum miscibility pressure value obtained in (3) judges note CO2Oil reservoirs CO2Mixed phase region.
As the further scheme of the present invention: this note CO2Oil reservoirs CO2Mixed phase region decision standard is: 1) target reservoir is treated
The formation pressure of evaluation region has minimized miscible pressure the most；2) target reservoir region to be evaluated is in CO2Involve
In the range of arriving.
Compared with prior art, the invention has the beneficial effects as follows:
Step of the present invention is clear, and application simplicity, for carrying out hyposmosis (fine and close) oil reservoir injection CO2Mechanism of oil displacement and note CO2Drive raising
Recovery efficiency technique research provides a set of judgement and evaluation standard scientific and reasonable, reliable.As long as determining the oil reservoir of target reservoir
Pressure Distribution plate, oil reservoir CO2Saturation distribution feature plate, target reservoir CO2Minimum miscibility pressure with crude oil
Etc. (MMP) characteristic parameter meets above-mentioned discrimination standard respectively and not only can determine whether whether oil reservoir belongs to mixed phase and drive, and can determine whether oil
In Tibetan, whether region to be evaluated is mixed phase area type, it is also possible to instruct hyposmosis (fine and close) oil reservoir injection CO2Drive and carry out phase
Corresponding development strategy research, has important theory and mining site practice significance.As can be seen here, popularizing application prospect of the present invention is wide
Wealthy, remarkable economic and social benefits.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, as it is shown in figure 1, the note CO of the present invention2Oil reservoirs CO2Mixed phase region decision method, its step is such as
Under:
In step 101, target reservoir being carried out meticulous pool description, set up oil reservoir detailed geological model, the purpose of this step is
Set up the geological model that precision is of a relatively high, carry out reservoir numerical simulation research for lower step and lay geological foundation.Flow process enters
Step 102.
In step 102, based on oil reservoir detailed geological model, abundant examination dynamic and static data is carried out reservoir numerical simulation and is ground
Study carefully, obtain the formation pressure distribution characteristics plate in region to be evaluated, oil reservoir CO2Saturation distribution feature plate.Flow process enters into
Step 103.
In step 103, by carrying out long slim tube driving test test analysis, measure target reservoir CO2Minimum with crude oil
Miscible pressure.Flow process enters step 104.
In step 104, utilize target reservoir characteristic index (the formation pressure distribution spy obtained in step 102, step 103
Levy plate, oil reservoir CO2Saturation distribution feature plate, target reservoir CO2Minimum miscibility pressure with crude oil), comprehensive descision target
Whether oil reservoir belongs to mixed phase is driven, and in comprehensive descision target reservoir, whether region to be evaluated is mixed phase region.Note CO2Oil reservoirs CO2Mixed
Alpha region criterion includes: the formation pressure in (1) target reservoir region to be evaluated has minimized miscible pressure
(MMP)；(2) target reservoir region to be evaluated is in CO2In the range of having fed through to.Flow process terminates.
The present invention utilizes reservoir oil layer Pressure Distribution plate, oil reservoir CO2Saturation distribution feature plate, CO2 are with former
The characteristic indexs such as the minimum miscibility pressure of oil judge whether oil reservoir belongs to mixed phase and drive, it is provided that a kind of note CO2Oil reservoirs CO2Mixed
Alpha region determination methods, is used for solving hyposmosis (fine and close) oil reservoir injection CO2Drive whether mixed phase judges the unclear problem differentiating difficulty.
The present invention not only achieves note CO2Oil reservoirs CO2Mixed phase region decision work standardization, the purpose of standardization, but also can refer to
Lead hyposmosis (fine and close) oil reservoir injection CO2Drive and carry out corresponding development strategy research, there is important theory and mining site practice meaning
Justice.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (2)
1. note CO2Oil reservoirs CO2Mixed phase region decision method, it is characterised in that comprise the following steps:
(1) target reservoir is carried out meticulous pool description, set up oil reservoir detailed geological model；
(2) on the basis of step (1), carry out target reservoir numerical simulation study, obtain formation pressure distribution characteristics plate, oil
Layer CO2Saturation distribution feature plate；
(3) by long slim tube driving test, target reservoir CO is measured2Minimum miscibility pressure with crude oil；
(4) formation pressure distribution characteristics plate, the oil reservoir CO obtained in step (2) is utilized2Saturation distribution feature plate and step
(3) the minimum miscibility pressure value obtained in judges note CO2Oil reservoirs CO2Mixed phase region.
Note CO the most according to claim 12Oil reservoirs CO2Mixed phase region decision method, it is characterised in that this note CO2The displacement of reservoir oil
Hide CO2Mixed phase region decision standard is: 1) formation pressure in target reservoir region to be evaluated has minimized miscible pressure the most；
2) target reservoir region to be evaluated is in CO2In the range of having fed through to.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825109.8A CN106285582A (en) | 2016-09-18 | 2016-09-18 | Note CO2oil reservoirs CO2mixed phase region decision method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610825109.8A CN106285582A (en) | 2016-09-18 | 2016-09-18 | Note CO2oil reservoirs CO2mixed phase region decision method |
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| CN106285582A true CN106285582A (en) | 2017-01-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884635A (en) * | 2017-03-03 | 2017-06-23 | 中国石油大学(北京) | Low, the extra-low permeability oil reservoirs CO of one kind2Drive the assay method of minimum miscibility pressure |
| CN108798614A (en) * | 2017-05-05 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of determination method of CO2 displacement of reservoir oils mixed phase degree |
| CN110295878A (en) * | 2018-03-21 | 2019-10-01 | 陕西延长石油(集团)有限责任公司研究院 | Method for executing pressure break in fine and close oily oil reservoir and improving oil recovery |
| CN111027887A (en) * | 2019-12-25 | 2020-04-17 | 中国石油大学(北京) | Oil displacement mechanism determination method and system |
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2016
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884635A (en) * | 2017-03-03 | 2017-06-23 | 中国石油大学(北京) | Low, the extra-low permeability oil reservoirs CO of one kind2Drive the assay method of minimum miscibility pressure |
| CN108798614A (en) * | 2017-05-05 | 2018-11-13 | 中国石油化工股份有限公司 | A kind of determination method of CO2 displacement of reservoir oils mixed phase degree |
| CN108798614B (en) * | 2017-05-05 | 2020-09-01 | 中国石油化工股份有限公司 | Method for determining CO2 oil displacement miscible degree |
| CN110295878A (en) * | 2018-03-21 | 2019-10-01 | 陕西延长石油(集团)有限责任公司研究院 | Method for executing pressure break in fine and close oily oil reservoir and improving oil recovery |
| CN111027887A (en) * | 2019-12-25 | 2020-04-17 | 中国石油大学(北京) | Oil displacement mechanism determination method and system |
| CN111027887B (en) * | 2019-12-25 | 2024-03-05 | 中国石油大学(北京) | Oil displacement mechanism determining method and system |
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Application publication date: 20170104 |