CN102312666A - Method for improving oil-water displacement recovery ratio of low-permeable oil reservoir - Google Patents
Method for improving oil-water displacement recovery ratio of low-permeable oil reservoir Download PDFInfo
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- CN102312666A CN102312666A CN2010102271283A CN201010227128A CN102312666A CN 102312666 A CN102312666 A CN 102312666A CN 2010102271283 A CN2010102271283 A CN 2010102271283A CN 201010227128 A CN201010227128 A CN 201010227128A CN 102312666 A CN102312666 A CN 102312666A
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Abstract
The invention relates to a method for improving the oil-water displacement recovery ratio of a low-permeable oil reservoir, which comprises the following steps of: preparing a mixed aqueous solution containing 400-4000mg/L of surfactant and 200-2000mg/L of foam stabilizer from the surfactant, the foam stabilizer and water; and mixing the mixed aqueous solution and a gas according to a volume ratio of the solution to the gas of 1: (0.1-2), and injecting into the oil reservoir through a water injection well, wherein the injection time is 90-120 days. The surfactant is selected from one or two of branched sodium alkybenzenesulfonate, alkyl polyoxyethylene ether sodium sulfate, alkyl polyoxyethylene ether sodium carboxylate, fatty alcohol ether sodium sulfate and cocoamido propyl hydroxy sulfobetaine; the foam stabilizer is sodium carboxymethylcellulose; and the gas is air. According to the invention, after the water content of the extracted solution reaches 60 percent, the oil displacement efficiency is improved by 20 percent compared with waterflooding, and the water content is reduced by 13-27 percent.
Description
Technical field:
The present invention relates to a kind of extra-low permeability (permeability 1～10 * 10
-3Um
2) the steady oil control of high water-cut stage water (or oil increasing precipitation) in the waterflooding oil field, improve the water drive oil effect, improve the method for waterflood recovery efficiency factor.
Background technology
Extra-low permeability low pressure reservoirs permeability is low by (1～10 * 10
-3Um
2), formation pressure low (about pressure coefficient 0.7) adopts the waterflooding extraction mode.Get into high water-cut development after date in the oil field, around how improving water drive oil effect, raising well yield, steady oil control water (or oil increasing precipitation), improving the reservoir water drive recovery ratio, be the problem that the oil field development technician studies tackling key problem always.
The existing waterflooding extraction mode of extra-low permeability waterflooding reservoir, waterflood recovery efficiency factor still have a large amount of oils in place can't be converted into crude output below 25%, cause the huge waste of petroleum resources.Polymer flooding is at present comparatively advanced raising recovery efficiency technique, can improve recovery ratio more than 10%, but still have a large amount of crude oil stay underground can't extraction, and it can only be used for permeability greater than 50 * 10
-3Um
2Middle and high infiltration pass through oil reservoir, be not suitable for extra-low permeability oil reservoirs, how improving extra-low permeability waterflooding reservoir water drive oil effect, improving the reservoir water drive recovery ratio is the very work of difficulty, presses for the new technical method of research and development.
Summary of the invention
It is good to the purpose of this invention is to provide a kind of injection property; Stability is good; The composite air foam that surface-active is high; High water-cut stage in the extra-low permeability waterflooding oil field injects oil reservoir with it from water injection well, effectively improves the method for the raising extra-low permeability oil reservoirs water drive oil recovery ratio of water drive oil effect, steady oil control water (or oil increasing precipitation).
The method of raising low-permeability oil deposit water drive oil recovery ratio of the present invention is characterized in that:
A. earlier surfactant, foam stabiliser and water are mixed with the mixed aqueous solution that contains surfactant 400～4000mg/L, foam stabiliser 200～2000mg/L.
B. with mixed aqueous solution according to liquid: gas=1: the ratio of (0.1～2) (subsurface volume) is mixed simultaneously through water injection well and is injected oil reservoir, and injection length is 90～120 days.
C. the described surfactant of this invention is one or both in sodium branched alkyl benzene sulfonate, alkyl polyoxyethylene ether sodium sulphate, alkyl polyoxyethylene ether carboxylic acid sodium, fatty alcohol-ether sodium sulfate, the coconut oil amido propyl hydroxyl sulphur betaine.This invents described foam stabiliser is that one or both and other foam stabilizing additive in sanlose, the polyacrylamide is formed.
D. the described gas of this invention is air.
Effect of the present invention is to show in the laboratory core displacement experiment result who carries out, output liquid is moisture reach 60% back water drive and change composite air over to and drive foam after, oil displacement efficiency is driven than water filling and is improved 20%, moisture content decline 13-27%.The individual well that has carried out 1 mouthful of well injects field trial, the corresponding oil well rate 73.6% that takes effect, individual well day produce oil rise to 3.5t by 1.3t, moisturely drop to 63.4% by 79.8%, The field has obtained obvious effects.
The specific embodiment
Embodiment 1
A. alkyl polyoxyethylene ether sodium sulphate, sanlose, coconut oil amido propyl hydroxyl sulphur betaine and water are mixed with the mixed aqueous solution that contains alkyl polyoxyethylene ether sodium sulphate 2000mg/L, coconut oil amido propyl hydroxyl sulphur betaine 1000mg/L, sanlose 2000mg/L.
B. according to mixed aqueous solution: the mixed of air=1: 1 (subsurface volume) is injected oil reservoir through water injection well simultaneously.
C. total injection rate of mixed aqueous solution and air (subsurface volume) is 5000m
3, injection length is 90～120 days, also can inject continuously.Restoring injection after injection is accomplished, after general water filling well group took effect, the corresponding average individual well amount of increase in production of producing well was 30%, and period of validity was above 6 months.
The method of raising low-permeability oil deposit water drive oil recovery ratio of the present invention is applicable to oil reservoir permeability 1～10 * 10
-3Um
2, reservoir temperature is not higher than 70 ℃, and formation water salinity is lower than 60000mg/L, and calcium ions and magnesium ions concentration is lower than 10000mg/L, and in-place oil viscosity is lower than the oil reservoir of 10mPa.s.During use, according to analysis to oilfield reservoir characteristic, characteristic of fluid, water filling characteristic, through laboratory test, adjustment composite air foam solution: the ratio of gas and total injection rate.
Embodiment 2
A. alkyl polyoxyethylene ether carboxylic acid sodium, sanlose, coconut oil amido propyl hydroxyl sulphur betaine and water are mixed with the mixed aqueous solution that contains alkyl polyoxyethylene ether carboxylic acid sodium 2000mg/L, coconut oil amido propyl hydroxyl sulphur betaine 1000mg/L, polyacrylamide 1500mg/L.
B. according to mixed aqueous solution: the mixed of air=1: 0.5 (subsurface volume) is injected oil reservoir through water injection well simultaneously.
C. total injection rate of mixed aqueous solution and air (subsurface volume) is 5000m
3, injection length is 120 days, injects continuously.Restoring injection after injection is accomplished, after general water filling well group took effect, the corresponding average individual well amount of increase in production of producing well was 30%, and period of validity was above 6 months.
The method of raising low-permeability oil deposit water drive oil recovery ratio of the present invention is applicable to oil reservoir permeability 1～10 * 10
-3Um
2, reservoir temperature is not higher than 70 ℃, and formation water salinity is lower than 60000mg/L, and calcium ions and magnesium ions concentration is lower than 10000mg/L, and in-place oil viscosity is lower than the oil reservoir of 10mPa.s.During use, according to analysis to oilfield reservoir characteristic, characteristic of fluid, water filling characteristic, through laboratory test, adjustment composite air foam solution: the ratio of gas and total injection rate.
Embodiment 3
A. fatty alcohol-ether sodium sulfate, sanlose, coconut oil amido propyl hydroxyl sulphur betaine and water are mixed with the mixed aqueous solution of fatty pure ether sodium sulfate 2000mg/L, coconut oil amido propyl hydroxyl sulphur betaine 1000mg/L, polyacrylamide 1500mg/L.
B. according to mixed aqueous solution: the mixed of air=1: 0.1 (subsurface volume) is injected oil reservoir through water injection well simultaneously.
C. total injection rate of mixed aqueous solution and air (subsurface volume) is 5000m
3, injection length is 90～120 days, also can inject continuously.Restoring injection after injection is accomplished, after general water filling well group took effect, the corresponding average individual well amount of increase in production of producing well was 30%, and period of validity was above 6 months.
The method of raising low-permeability oil deposit water drive oil recovery ratio of the present invention is applicable to oil reservoir permeability 1～10 * 10
-3Um
2, reservoir temperature is not higher than 70 ℃, and formation water salinity is lower than 60000mg/L, and calcium ions and magnesium ions concentration is lower than 10000mg/L, and in-place oil viscosity is lower than the oil reservoir of 10mPa.s.During use, according to analysis to oilfield reservoir characteristic, characteristic of fluid, water filling characteristic, through laboratory test, adjustment composite air foam solution: the ratio of gas and total injection rate.
Embodiment 4
A. sodium branched alkyl benzene sulfonate, sanlose, coconut oil amido propyl hydroxyl sulphur betaine and water are mixed with the mixed aqueous solution that contains alkyl polyoxyethylene ether sodium sulphate 2000mg/L, coconut oil amido propyl hydroxyl sulphur betaine 1000mg/L, polyacrylamide 1250mg/L.
B. according to mixed aqueous solution: the mixed of air=1: 1.5 (subsurface volume) is injected oil reservoir through water injection well simultaneously.
C. total injection rate of mixed aqueous solution and air (subsurface volume) is 5000m
3, injection length is 90～120 days, also can inject continuously.Restoring injection after injection is accomplished, after general water filling well group took effect, the corresponding average individual well amount of increase in production of producing well was 30%, and period of validity was above 6 months.
The method of raising low-permeability oil deposit water drive oil recovery ratio of the present invention is applicable to oil reservoir permeability 1～10 * 10
-3Um
2, reservoir temperature is not higher than 70 ℃, and formation water salinity is lower than 60000mg/L, and calcium ions and magnesium ions concentration is lower than 10000mg/L, and in-place oil viscosity is lower than the oil reservoir of 10mPa.s.During use, according to analysis to oilfield reservoir characteristic, characteristic of fluid, water filling characteristic, through laboratory test, adjustment composite air foam solution: the ratio of gas and total injection rate.
Claims (1)
1. method that improves low-permeability oil deposit water drive oil recovery ratio, oil reservoir permeability 1～10 * 10
-3Um
2, reservoir temperature is not higher than 70 ℃, and formation water salinity is lower than 60000mg/L, and calcium ions and magnesium ions concentration is lower than 10000mg/L, and in-place oil viscosity is lower than 10mPa.s; It is characterized in that:
(a) surfactant, foam stabiliser and water are mixed with the mixed aqueous solution that contains surfactant 400～4000mg/L, foam stabiliser 200～2000mg/L;
(b) mixed aqueous solution is pressed liquid: gas=1: (0.1～2) volume ratio is mixed, and injects oil reservoir through water injection well; Injection length is 90～120 days;
Described surfactant is one or both in sodium branched alkyl benzene sulfonate, alkyl polyoxyethylene ether sodium sulphate, alkyl polyoxyethylene ether carboxylic acid sodium, fatty alcohol-ether sodium sulfate, the coconut oil amido propyl hydroxyl sulphur betaine;
Described foam stabiliser is a sanlose;
Described gas is air.
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| CN201010227128.3A CN102312666B (en) | 2010-07-06 | 2010-07-06 | Method for improving oil-water displacement recovery ratio of low-permeable oil reservoir |
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| CN201010227128.3A CN102312666B (en) | 2010-07-06 | 2010-07-06 | Method for improving oil-water displacement recovery ratio of low-permeable oil reservoir |
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| CN102312666A true CN102312666A (en) | 2012-01-11 |
| CN102312666B CN102312666B (en) | 2014-10-15 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838971A (en) * | 2012-08-17 | 2012-12-26 | 中国石油天然气股份有限公司 | Foaming agent special for huff and puff of rocket power compound heat carrier |
| CN103773351A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Foam composition for gas displacement of high salinity oil reservoir, preparation method and application |
| CN103834379A (en) * | 2014-01-03 | 2014-06-04 | 中国石油大学(华东) | Wormlike micelle foam system and method for enhancing oil recovery by using same |
| CN103965845A (en) * | 2013-02-05 | 2014-08-06 | 中国石油化工股份有限公司 | Flushing fluid for cementing of horizontal shale gas well |
| CN104099077A (en) * | 2013-10-28 | 2014-10-15 | 中国石油化工股份有限公司 | High mineralization oil reservoir composite oil displacement agent |
| CN104893703A (en) * | 2015-05-26 | 2015-09-09 | 西南石油大学 | Low-solidifying-point foaming agent for oilfield operation |
| CN106281284A (en) * | 2015-06-08 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of foam flooding foaming agent and preparation method thereof |
| CN106497534A (en) * | 2016-08-31 | 2017-03-15 | 西南石油大学 | A kind of strengthening foam system built by nano-cellulose |
| CN110791272A (en) * | 2018-08-02 | 2020-02-14 | 中国石油化工股份有限公司 | Temperature-resistant salt-tolerant microbial fermentation broth foam system and preparation method thereof |
| CN112943192A (en) * | 2021-02-03 | 2021-06-11 | 中国石油天然气股份有限公司 | Mining method suitable for low-permeability conglomerate oil reservoir |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106479470B (en) * | 2015-08-31 | 2020-12-11 | 中国石油化工股份有限公司 | Low-tension foaming agent for improving recovery ratio of crude oil of heterogeneous oil reservoir and oil displacement method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4008165A (en) * | 1975-03-14 | 1977-02-15 | Texaco Inc. | Surfactant oil recovery process usable in high temperature formations having high concentrations of polyvalent ions |
| CN1030118A (en) * | 1987-05-28 | 1989-01-04 | 切夫尔昂研究公司 | Improve the method that steam flooding improves crude yield with the branched alkyl aromatic sulphonate |
| CN1651545A (en) * | 2005-01-07 | 2005-08-10 | 中国石化胜利油田有限公司地质科学研究院 | Method of raising oil deposil erude petroleum recovery ratio |
| CN101493006A (en) * | 2009-02-23 | 2009-07-29 | 中国海洋石油总公司 | Method for controlling bottom water fingering by foam |
-
2010
- 2010-07-06 CN CN201010227128.3A patent/CN102312666B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4008165A (en) * | 1975-03-14 | 1977-02-15 | Texaco Inc. | Surfactant oil recovery process usable in high temperature formations having high concentrations of polyvalent ions |
| CN1030118A (en) * | 1987-05-28 | 1989-01-04 | 切夫尔昂研究公司 | Improve the method that steam flooding improves crude yield with the branched alkyl aromatic sulphonate |
| CN1651545A (en) * | 2005-01-07 | 2005-08-10 | 中国石化胜利油田有限公司地质科学研究院 | Method of raising oil deposil erude petroleum recovery ratio |
| CN101493006A (en) * | 2009-02-23 | 2009-07-29 | 中国海洋石油总公司 | Method for controlling bottom water fingering by foam |
Non-Patent Citations (2)
| Title |
|---|
| 梅旭辉 等: "《食品药品化妆品监督管理大全》", 30 June 2004, 湖北科学技术出版社 * |
| 郭东红 等: "表面活性剂在特殊油藏原油开采中的一些应用", 《精细石油化工进展》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838971A (en) * | 2012-08-17 | 2012-12-26 | 中国石油天然气股份有限公司 | Foaming agent special for huff and puff of rocket power compound heat carrier |
| CN103773351A (en) * | 2012-10-25 | 2014-05-07 | 中国石油化工股份有限公司 | Foam composition for gas displacement of high salinity oil reservoir, preparation method and application |
| CN103965845B (en) * | 2013-02-05 | 2017-04-12 | 中国石油化工股份有限公司 | Flushing fluid for cementing of horizontal shale gas well |
| CN103965845A (en) * | 2013-02-05 | 2014-08-06 | 中国石油化工股份有限公司 | Flushing fluid for cementing of horizontal shale gas well |
| CN104099077A (en) * | 2013-10-28 | 2014-10-15 | 中国石油化工股份有限公司 | High mineralization oil reservoir composite oil displacement agent |
| CN103834379B (en) * | 2014-01-03 | 2016-09-07 | 中国石油大学(华东) | A kind of vermiculate glues foam system and the method improving recovery ratio with it |
| CN103834379A (en) * | 2014-01-03 | 2014-06-04 | 中国石油大学(华东) | Wormlike micelle foam system and method for enhancing oil recovery by using same |
| CN104893703A (en) * | 2015-05-26 | 2015-09-09 | 西南石油大学 | Low-solidifying-point foaming agent for oilfield operation |
| CN106281284A (en) * | 2015-06-08 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of foam flooding foaming agent and preparation method thereof |
| CN106281284B (en) * | 2015-06-08 | 2018-12-21 | 中国石油化工股份有限公司 | A kind of foam flooding foaming agent and preparation method thereof |
| CN106497534A (en) * | 2016-08-31 | 2017-03-15 | 西南石油大学 | A kind of strengthening foam system built by nano-cellulose |
| CN110791272A (en) * | 2018-08-02 | 2020-02-14 | 中国石油化工股份有限公司 | Temperature-resistant salt-tolerant microbial fermentation broth foam system and preparation method thereof |
| CN112943192A (en) * | 2021-02-03 | 2021-06-11 | 中国石油天然气股份有限公司 | Mining method suitable for low-permeability conglomerate oil reservoir |
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