CN1458220A - Low alkali or no-alkali composite oil displacement agent formula used in triple oil production - Google Patents
Low alkali or no-alkali composite oil displacement agent formula used in triple oil production Download PDFInfo
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- CN1458220A CN1458220A CN 02117771 CN02117771A CN1458220A CN 1458220 A CN1458220 A CN 1458220A CN 02117771 CN02117771 CN 02117771 CN 02117771 A CN02117771 A CN 02117771A CN 1458220 A CN1458220 A CN 1458220A
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Abstract
The composite oil-displacement agent consists of polymer 0-0.3 wt%, surfactant 0.05-0.6 wt%, alkali 0-1.2 wt%, salt 0-1.2 wt% and water 97-9-99.95 wt%, and is produced in kettle reactor with coagulated petroleum fraction from raw oil. It has surfactant concentration not higher than available systems, high interface tension reducing effect and stable performance. The composite oil-displacement agent has no high concentration of alkali and salt to replace alkali partially or completely while reaching superlow interface tension and thus low cost and no alkali scale formed. In the compounding of the composite oil-displacement agent, common sewage may be used and high produces certain environment protection effect.
Description
Relate to the field
The present invention relates to the combination flooding prescription in the oil tertiary oil recovery, specifically, is a kind of low alkali alkali-free combination flooding prescription of using in tertiary oil recovery.
Background technology
Underground crude oil through once with secondary recovery after, most of crude oil still remains in the stratum.Tertiary oil recovery technology is to utilize chemical agent to carry out the technology of intensified oil reduction, combination flooding refers to the complex oil displacing technology that both or three unify among the alkali, surfactant and polymer three, polymkeric substance increases the viscosity of displacing fluid, improve oil/water mobility ratio and intake profile, its visco-elasticity also has certain washing oil effect, tensio-active agent reduces oil/water termination tension force, emulsification and solubilising crude oil; Acidic substance reaction in alkali and the crude oil generates new tensio-active agent on the spot, plays synergistic effect with adding tensio-active agent, reduces oil/water termination tension force to a greater extent.Be to improve the highest a kind of method of recovery ratio, in theory can be with the whole extraction of oil, but alkali found the alkali dirt in actual applications and damaged serious problems such as stratum and holddown, hindered the normal development of this technology.
Existing conventional ternary composite displacement system, the working concentration of its alkali is 1.0～1.5%, but from field test, expose some directly problems of this technology realization industrial applications of restriction, too high as (1) owing to alkali concn, oil reservoir and oil well fouling are badly damaged stratum, and must clean a barrel every 10～15 days, increase oil recovery difficulty and fringe cost, even directly influenced the ordinary production of oil well; (2) not only alkali concn is big, and highly basic commonly used (as NaOH) makes equipment and corrosive pipeline serious; (3), oil well productivity is descended because alkali concn is too high, and the emulsification of extraction liquid is serious, and the former innage of the viscosity ratio of water-in-oil emulsion is a lot.
Summary of the invention
The object of the present invention is to provide a kind of combination flooding prescription of low alkali alkali-free prescription, even the working concentration of its each component, effective concentration scope, interfacial property and viscosity etc. are equal to or are better than the low alkali alkali-free combination flooding prescription of using of high alkali systems in tertiary oil recovery.
The present invention is achieved in that
Fill a prescription its main component and content of the combination flooding of using in the tertiary oil recovery is: (parts by weight)
Polymkeric substance 0～0.3
Tensio-active agent 0.05～0.6
Alkali 0～1.2
Salt 0～1.2
Water 97.9～99.95
The present invention also adopts following technical scheme:
Salt and alkali are not zero simultaneously in the above-mentioned prescription.
Described polymkeric substance can be polyacrylamide, modified polyacrylamide and xanthan gum (XC) etc.
Described tensio-active agent can be sulfonated petro-leum or be the complexed surfactant that host adds thinner and other surfactant compound with the sulfonated petro-leum that the proportioning of its component is (w/w):
Sulfonated petro-leum 50～100
Alkylsulfonate 0～50
Carboxylate salt 0～50
Alkylaryl sulphonate 0～35
Low-carbon alcohol 0～20
Described sulfonated petro-leum is generated down for 40～60 ℃ at curing temperature through axe formula reactor by decompression two wires (containing) the after cut oil of crude refining.
Described alkali comprises NaOH, KOH, Na
2CO
3NaHCO
3K
2CO
3KHCO
3Na
3PO
4, Na
2HPO
4NaH
2PO
4K
3PO
4K
2HPO
4KH
2PO
4Or the mixture of above-mentioned alkali.
Described salt is meant monovalence, divalent salts or its mixture, can be NaCl, KCl and Na
2SO
4
Described water can be ortho-water, can also be return water.
The invention has the advantages that:
(1) product is made raw material axe formula reactor sulfonation production with the condensed fraction oil of petroleum of crude oil, and production technique and equipment are simple, and raw material is self-produced to be easy to get, and production cost is low;
(2) the tensio-active agent working concentration is not higher than existing system, and it is effective that product reduces interfacial tension, stable performance;
(3) need not high concentration alkali in the ternary composite driving prescription, can reach ultra low interfacial tension, overcome the alkali dirt problem that high concentration alkali causes with the part or all of alternate base of salt;
(4) available common sewage and polymer-bearing waste-water configuration solution, environmental benefit is good;
(5) crude oil and the sewage of the different oil reservoirs in same oil field adapt to substantially, have general applicability;
(6) price of salt (Industrial Salt NaCl) is more much lower than alkali, and has overcome the holddown clean-out service that the alkali dirt causes.
Concrete enforcement
1, surface active agent composition (W/W) is:
Sulfonated petro-leum 86
Alkylsulfonate 6
Virahol 8
Measure northern 13 joint station polymer-bearing waste-waters and dispose NaCl in the saline and alkaline mixed solution: NaOH=2 with Daqing oil field three factories north, the three northwest 2-1-55 individual well crude oil that recover the oil: 1,0.15% 2 hours equilibrium interfacial tensions of the DQ-15 of Daqing Refinery company polymkeric substance are:
Measure northern 13 joint station polymer-bearing waste-waters and dispose NaCl in the saline and alkaline mixed solution: NaOH=2 with Daqing oil field three factories north, the three northwest 2-1-55 individual well crude oil that recover the oil: 1,0.3% 2 hours equilibrium interfacial tensions of the DQ-15 of Daqing Refinery company polymkeric substance are:
Measure northern 13 joint station polymer-bearing waste-waters and dispose NaCl in the saline and alkaline mixed solution: NaOH=2 with Daqing oil field three factories north, the three northwest 2-1-55 individual well crude oil that recover the oil: 1,0.0% 2 hours equilibrium interfacial tensions of the DQ-15 of Daqing Refinery company polymkeric substance are:
2, surface active agent composition (W/W) is: sulfonated petro-leum 79 alkylbenzene sulfonates 11 petroleum carboxylates 2 Virahols 8
Measure northern 13 joint station polymer-bearing waste-waters and dispose NaCl in the saline and alkaline mixed solution: NaOH=5 with Daqing oil field three factories north, the three northwest 2-1-55 individual well crude oil that recover the oil: 1,0.15% 2 hours equilibrium interfacial tensions of the DQ-15 of Daqing Refinery company polymkeric substance are:
Measure the common sewage of northern 15 joint stations and dispose NaCl in the saline and alkaline mixed solution: NaOH=5 with Daqing oil field three factories north, the 15 joint station crude oil that recover the oil: 1,0.15% 2 hours equilibrium interfacial tensions of the DQ-15 of Daqing Refinery company polymkeric substance are:
Measure the common sewage configuration of northern 15 joint stations alkali-free and only add pure salt NaCL with Daqing oil field three factories north, the 15 joint station crude oil that recover the oil, 0.15% 2 hours equilibrium interfacial tensions of the DQ-15 of Daqing Refinery company polymkeric substance are:
Claims (8)
1. the low alkali alkali-free combination flooding prescription of using in tertiary oil recovery, it is characterized in that: main component and content are: (parts by weight)
Polymkeric substance 0～0.3
Tensio-active agent 0.05～0.6
Alkali 0～1.2
Salt 0～1.2
Water 97.9～99.95
2. the low alkali alkali-free combination flooding prescription of using in tertiary oil recovery according to claim 1 is characterized in that: when salt was zero in the above-mentioned prescription, alkali was greater than zero, and when alkali was zero, salt was greater than zero.
3. the low alkali alkali-free combination flooding prescription of using in tertiary oil recovery according to claim 1, it is characterized in that: described polymkeric substance can be polyacrylamide, modified polyacrylamide and xanthan gum (XC).
4. the low alkali alkali-free combination flooding prescription of in tertiary oil recovery, using according to claim 1, it is characterized in that: described tensio-active agent can be sulfonated petro-leum or be the complexed surfactant that host adds thinner and other surfactant compound with the sulfonated petro-leum that the proportioning of its component is (w/w):
Sulfonated petro-leum 50～100
Alkylsulfonate 0～50
Carboxylate salt 0～50
Alkylaryl sulphonate 0～35
Low-carbon alcohol 0～20
5. the low alkali alkali-free combination flooding prescription of using in tertiary oil recovery according to claim 4 is characterized in that: described sulfonated petro-leum is generated down for 40～60 ℃ at curing temperature through axe formula reactor by decompression two wires (containing) the after cut oil of crude refining.
6. the low alkali alkali-free combination flooding prescription of using in tertiary oil recovery according to claim 1, it is characterized in that: described alkali comprises NaOH, KOH, Na
2CO
3NaHCO
3K
2CO
3KHCO
3, Na
3PO
4Na
2HPO
4NaH
2PO
4K
3PO
4K
2HPO
4KH
2PO
4Or the mixture of above-mentioned alkali.
7. the low alkali alkali-free combination flooding prescription of using in tertiary oil recovery according to claim 1, it is characterized in that: described salt is meant monovalence, divalent salts or its mixture, can be NaCl, KCl and Na
2SO
4
8. the low alkali alkali-free combination flooding prescription of using in tertiary oil recovery according to claim 1, it is characterized in that: described water can be ortho-water, can also be return water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02117771 CN1458220A (en) | 2002-05-17 | 2002-05-17 | Low alkali or no-alkali composite oil displacement agent formula used in triple oil production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02117771 CN1458220A (en) | 2002-05-17 | 2002-05-17 | Low alkali or no-alkali composite oil displacement agent formula used in triple oil production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1458220A true CN1458220A (en) | 2003-11-26 |
Family
ID=29426662
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|---|---|---|---|
| CN 02117771 Pending CN1458220A (en) | 2002-05-17 | 2002-05-17 | Low alkali or no-alkali composite oil displacement agent formula used in triple oil production |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604620A (en) * | 2012-02-10 | 2012-07-25 | 胜利油田中胜环保有限公司 | Petroleum sulfonate compounded system for oil displacement and preparation method thereof |
| CN101987954B (en) * | 2009-07-30 | 2013-07-03 | 中国石油天然气股份有限公司 | Alkali-free compound flooding composition |
| CN104974729A (en) * | 2015-06-10 | 2015-10-14 | 天津大港油田滨港集团博弘石油化工有限公司 | Ternary composite oil displacement agent |
| CN105038752A (en) * | 2015-06-16 | 2015-11-11 | 中国石油化工股份有限公司 | Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system |
| CN113139155A (en) * | 2021-04-23 | 2021-07-20 | 南京富岛信息工程有限公司 | Large-range crude oil blending selection optimization method |
-
2002
- 2002-05-17 CN CN 02117771 patent/CN1458220A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101987954B (en) * | 2009-07-30 | 2013-07-03 | 中国石油天然气股份有限公司 | Alkali-free compound flooding composition |
| CN102604620A (en) * | 2012-02-10 | 2012-07-25 | 胜利油田中胜环保有限公司 | Petroleum sulfonate compounded system for oil displacement and preparation method thereof |
| CN104974729A (en) * | 2015-06-10 | 2015-10-14 | 天津大港油田滨港集团博弘石油化工有限公司 | Ternary composite oil displacement agent |
| CN105038752A (en) * | 2015-06-16 | 2015-11-11 | 中国石油化工股份有限公司 | Compound oil-displacing agent for high temperature reservoir and compound oil-displacing system |
| CN105038752B (en) * | 2015-06-16 | 2018-03-23 | 中国石油化工股份有限公司 | A kind of compound oil displacement agent and composite oil-displacing system for high-temperature oil reservoir |
| CN113139155A (en) * | 2021-04-23 | 2021-07-20 | 南京富岛信息工程有限公司 | Large-range crude oil blending selection optimization method |
| CN113139155B (en) * | 2021-04-23 | 2024-02-06 | 南京富岛信息工程有限公司 | Large-scale crude oil blending selection optimization method |
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