CN104832139A - Determination method for injected volume of carbon dioxide during huff-puff process of carbon dioxide - Google Patents
Determination method for injected volume of carbon dioxide during huff-puff process of carbon dioxide Download PDFInfo
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- CN104832139A CN104832139A CN201510194599.1A CN201510194599A CN104832139A CN 104832139 A CN104832139 A CN 104832139A CN 201510194599 A CN201510194599 A CN 201510194599A CN 104832139 A CN104832139 A CN 104832139A
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- carbon dioxide
- injected volume
- determination method
- huff
- oil
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Classifications
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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 invention provides a determination method for the injected volume of carbon dioxide during a huff-puff process of carbon dioxide.The determination method for the injected volume of carbon dioxide comprises the step of determining the volume amount V of liquid carbon dioxide by means of selected adjusting radii a and b, empirical coefficient PV equal to 0.1 minus 0.3, degree of oil layer porosity Phi, and thickness of an oil layer h. V is equal to Pv*pi*a*b*Phi*H. Phi refers to porosity %. Pv refers to empirical coefficient. H refers to production interval of a well. Ma and b refer to treating radii, m. The determination method for the injected volume of carbon dioxide during a huff-puff process of carbon dioxide helps to overcome technical defects and determine the injected volume of carbon dioxide again. After utilization of novel injected volume, the oil well has obvious oil increasing effect.
Description
Technical field
The present invention relates to a kind of raising oil well recovery efficiency technique field, be specifically related to a kind of CO_2 stimulation carbon dioxide in process and inject method for determination of amount.
Background technology
CO_2 stimulation is after a certain amount of carbon dioxide is injected stratum by the oil jacket annular space of oil well, through stewing well after a while, carbon dioxide is fully diffused in oil reservoir, plays acidification to dispel block effect, and make viscosity of crude reduction, volume expansion etc., make crude oil be easy to extraction.But at the scene in process of the test, due to interlayer physical difference, interlayer pressure difference, epidermis interference etc., the carbon dioxide injected can not even air-breathing, if injection great amount of carbon dioxide, then can play displacement effect, effect of increasing production is not obvious, but if inject less carbon dioxide, does not then have production-increasing function.
Summary of the invention:
In order to solve the technical problem existed in background technology, the present invention proposes a kind of CO_2 stimulation carbon dioxide in process and injects method for determination of amount, instant invention overcomes technology prejudice, has redefined carbon dioxide injection amount, after using new injection rate, oil well oil increasing effect is obvious.
Technical scheme of the present invention is: this CO_2 stimulation carbon dioxide in process injects method for determination of amount, liquid carbon dioxide volumetric usage V: determined by adjustment radius a and b selected, empirical coefficient Pv=0.1-0.3, oil reservoir degree of porosity φ, core intersection h, V=Pv π ab φ H, wherein:
φ---degree of porosity, %
Pv---empirical coefficient
H---producing well section, m
A, b---treatment radius, m.
The present invention has following beneficial effect: instant invention overcomes technology prejudice, all the time in carbon dioxide injection amount deterministic process, empirical coefficient Pv=1, that is empirical coefficient Pv goes to calculate according to 1, make carbon dioxide injection amount higher, carbon dioxide then can play displacement effect, and effect of increasing production is not obvious.The present invention finds through on-the-spot many experiments, and during empirical coefficient Pv=0.1-0.3, oil increasing effect obviously has a raising, therefore has redefined carbon dioxide injection amount, and after using new injection rate, oil well oil increasing effect is obvious.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram that carbon dioxide injection amount of the present invention is determined.
Detailed description of the invention:
The invention will be further described below:
As shown in Figure 1, this CO_2 stimulation carbon dioxide in process injects method for determination of amount: liquid carbon dioxide volumetric usage V: determined by adjustment radius a and b selected, empirical coefficient Pv=0.1-0.3, oil reservoir degree of porosity φ, core intersection h, V=Pv π ab φ H, wherein:
φ---degree of porosity, %
Pv---empirical coefficient
H---producing well section, m
A, b---treatment radius, m.
Bei15 well injects 100m
3prepad fluid fluid, reinject liquid carbon dioxide, and inject liquid carbon dioxide 6 tons, the average injection pressure of well head remains on about 10MPa, stewing well opening well and making production after 20 days, and on average increase day by day oil 4.2 tons, and accumulative increasing oil 378 tons, CO_2 stimulation oil increasing effect is obvious.
Claims (1)
1. a CO_2 stimulation carbon dioxide in process injects method for determination of amount, liquid carbon dioxide volumetric usage V: determined by adjustment radius a and b selected, empirical coefficient Pv=0.1-0.3, oil reservoir degree of porosity φ, core intersection h, V=Pv π ab φ H, wherein:
φ---degree of porosity, %
P
v---empirical coefficient
H---producing well section, m
A, b---treatment radius, m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194599.1A CN104832139A (en) | 2015-04-23 | 2015-04-23 | Determination method for injected volume of carbon dioxide during huff-puff process of carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194599.1A CN104832139A (en) | 2015-04-23 | 2015-04-23 | Determination method for injected volume of carbon dioxide during huff-puff process of carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104832139A true CN104832139A (en) | 2015-08-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510194599.1A Pending CN104832139A (en) | 2015-04-23 | 2015-04-23 | Determination method for injected volume of carbon dioxide during huff-puff process of carbon dioxide |
Country Status (1)
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| CN (1) | CN104832139A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257265A (en) * | 2015-10-28 | 2016-01-20 | 中国石油化工股份有限公司 | Method for optimizing CO2 injection rate to increase recovery ratio through CO2 displacement of reservoir oil |
| CN111764875A (en) * | 2020-06-09 | 2020-10-13 | 中国石油化工股份有限公司 | Oil recovery method and CO for assisting huff-puff oil increase2Injection amount determination method and device |
| CN112145137A (en) * | 2020-11-10 | 2020-12-29 | 西南石油大学 | CO optimization by numerical simulation2Method for injecting quantity of throughput cycle |
| CN114109324A (en) * | 2020-08-28 | 2022-03-01 | 中国石油天然气股份有限公司 | Method and device for determining well shut-in time |
-
2015
- 2015-04-23 CN CN201510194599.1A patent/CN104832139A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257265A (en) * | 2015-10-28 | 2016-01-20 | 中国石油化工股份有限公司 | Method for optimizing CO2 injection rate to increase recovery ratio through CO2 displacement of reservoir oil |
| CN105257265B (en) * | 2015-10-28 | 2019-08-20 | 中国石油化工股份有限公司 | A kind of CO2Drive the optimization method for improving recovery ratio injection rate |
| CN111764875A (en) * | 2020-06-09 | 2020-10-13 | 中国石油化工股份有限公司 | Oil recovery method and CO for assisting huff-puff oil increase2Injection amount determination method and device |
| CN114109324A (en) * | 2020-08-28 | 2022-03-01 | 中国石油天然气股份有限公司 | Method and device for determining well shut-in time |
| CN114109324B (en) * | 2020-08-28 | 2023-09-26 | 中国石油天然气股份有限公司 | Method and device for determining well closing time |
| CN112145137A (en) * | 2020-11-10 | 2020-12-29 | 西南石油大学 | CO optimization by numerical simulation2Method for injecting quantity of throughput cycle |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20151204 Address after: 303, B-10, room 4-8, service outsourcing industry park, 163000 Xinfeng Road, hi tech Zone, Heilongjiang, Daqing Applicant after: DAQING JINJUN PETROLEUM TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 163000 No. 4-12, Gaoping District, Datong song Road, Datong District, Heilongjiang, Daqing Applicant before: Zhao Jinshu |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150812 |
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| RJ01 | Rejection of invention patent application after publication |