CN1439689A - Alkali-mixed surfactant-polymer ternary composite oil displacement system and use thereof - Google Patents
Alkali-mixed surfactant-polymer ternary composite oil displacement system and use thereof Download PDFInfo
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- CN1439689A CN1439689A CN 02103697 CN02103697A CN1439689A CN 1439689 A CN1439689 A CN 1439689A CN 02103697 CN02103697 CN 02103697 CN 02103697 A CN02103697 A CN 02103697A CN 1439689 A CN1439689 A CN 1439689A
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Abstract
A three-element oil-displacing system for tertiary petroleum recovery is prepared from surfactant mixture (0.1-0.3 wt.%), polymer (0-0.2), Na2CO3 (0-1.2) and water (98-99). Said surfactant mixture contains sodium alkylarylsulfonate, straight-chain sodium laurylsulfate and alcohol. Its advantages are ultra-low interface tension, less damage to oil-bearing stratum, and less corrosion to well pipe and pump.
Description
The present invention relates to a kind of ternary composite oil-displacing system that improves a kind of alkali/mixed surfactant/polymkeric substance that oil recovery rate uses, particularly be the component and the preparation method of this mixed surfactant in the composite oil-displacing system.
At present, employed tensio-active agent is mainly with single aniorfic surfactant, or with several aniorfic surfactant phase blended mixed surfactants in composite oil-displacing system.More than these mixed surfactants in ternary composite oil-displacing system only when alkali (NaOH) concentration is the 0.5-1.2wt% scope, oil water interfacial tension just can be reduced to 10
-3The mN/m order of magnitude.Owing to contain highly basic NaOH in the ternary flooding system, make oil-bearing formation be subjected to very major injury, the oil well pipe scale formation is very serious.In maintenance, maintenance, drop into substantial contribution, consider, be unfavorable for big the popularization in oil field from the mixed economy angle.
The objective of the invention is for a kind of mixed surfactant is provided, and at the displacement of reservoir oil prescription of three-component compound system (alkali-mixed surfactant-polymkeric substance).In mixed surfactant concentration (commodity) is 0.05-0.6wt%; Polymer concentration is 0-0.2wt%; Alkali concn is under the condition of 0.4-1.2wt%, and this displacement of reservoir oil prescription can make oil water interfacial tension reach 10
-4The mN/m order of magnitude, recovery ratio improves more than 20% than water drive.Since no highly basic (NaOH) composite oil-displacing system that this programme adopts with compare with the composite oil-displacing system of highly basic (NaOH), little to the oil reservoir injury, oil well pipe, oil well pump scale formation are low, are keeping in repair, can save substantial contribution in the maintenance.
For realizing the purpose of foregoing invention
1, the alkali selected for use of the present invention is: Na
2CO
3
2, the polymkeric substance selected for use of the present invention is: water-soluble polyacrylamide, its molecular weight are 1000 * 10
4-2500 * 10
4
3, the mixed surfactant selected for use of the present invention is: molecular weight is at the alkylaryl sulphonate of 520-580, and straight chain sodium lauryl sulphate, ethylene glycol, Virahol are formulated through fully mixing.The main component of this mixed surfactant and content are (wt%):
Alkylaryl sulphonate 50-95
Straight chain sodium lauryl sulphate 0-50
Ethylene glycol 0-10
Virahol 0-10
The mixed surfactant that is mixed with above-mentioned material has following characteristics:
(1) alkylaryl sulphonate of the present invention's application is the oil soluble sulfonated petro-leum, and its lipophilicity is strong than wetting ability.
(2) alkylaryl sulphonate of the present invention's application is grand celebration fraction oil through the sulfonation gained.Be applied in Daqing oil field as host, more can bring into play its homology, of the same clan and good synergistic.
(3) the straight chain sodium lauryl sulphate of the present invention's application, its wetting ability is strong than lipophilicity.Throwing in this material in the mixed surfactant is in order to adjust the oleophilic hydrophil balance value of mixed surfactant.
(4) ethylene glycol, the Virahol of the present invention's application are in order to adjust the viscosity of mixed surfactant, oleophylic, the wetting ability of fine setting system.
4. the mixed surfactant selected for use of the present invention has following characteristics:
(1) mixed surfactant selected for use of the present invention is at weak base (Na
2CO
3) concentration be 0.4-1.2wt%,
Mixed surfactant concentration (commodity) is that 0.05-0.6wt%, polymer concentration are the composite oil-displacing system that is mixed with under the condition of 0-0.2wt%; Has higher interfacial activity.Minimum interfacial tension can reach 10
-4The mN/m order of magnitude.Oil recovery rate can improve more than 20% than water drive.
(2) mixed surfactant selected for use of the present invention has higher interfacial activity under weakly alkaline condition, realizes ultra low interfacial tension.Because what use is weak base, therefore little to the injury of oil reservoir, low to the corrosion and scaling of oil well pipe, oil well pump, in maintenance, maintenances, compare and can save substantial contribution with use highly basic.Thereby reduce the oil recovery comprehensive cost.
Below in conjunction with specific examples, technology of the present invention is elaborated: example 1: a kind of ternary composite oil-displacing system of mixed surfactant, wherein each major ingredient of mixed surfactant and content are: (wt%)
Sodium alkylarysulfonate: 80
Straight chain sodium lauryl sulphate: 17
Ethylene glycol 2
Virahol 1
This mixed surfactant-polymkeric substance-alkali (Na
2CO
3) ternary composite oil-displacing system and crude oil between form ultra low interfacial tension and see Table 1.Wherein the sodium alkylarysulfonate average equivalent is 520.
Interfacial tension between table 1 alkali/mixed surfactant/polymeric system and the crude oil
Annotate: (1) polymer concentration is 0.12%
| Mixed surfactant (wt%) | The interfacial tension mN/m of mixed surfactant/alkali/polymeric system and crude oil |
| ????0.05 | ????3.1×10 -3 |
| ????0.1 | ????3.5×10 -3 |
| ????0.2 | ????4.5×10 -4 |
| ????0.3 | ????5.1×10 -4 |
(2) alkali Na
2CO
3Concentration is 1.0%
(3) experimental temperature is 45 ℃
(4) crude oil is that the dehydration of Daqing oil field well head, gas-free oil, water are for injecting sewage
(5) mixed surfactant concentration is effective concentration
(6) testing tool: University of Texas, tensiometer model 500 examples 2: a kind of ternary composite oil-displacing system of mixed surfactant, wherein each major ingredient of mixed surfactant and content are: (wt%)
Sodium alkylarysulfonate: 75
Straight chain sodium lauryl sulphate: 22
Ethylene glycol 2
The Virahol 1 wherein molecular weight of sodium alkylarysulfonate is 540.This mixed surfactant-polymkeric substance-alkali (Na
2CO
3) ternary composite oil-displacing system and crude oil between form ultra low interfacial tension and see Table 2.
Interfacial tension between table 2 alkali/mixed surfactant/polymeric system and the crude oil
| Mixed surfactant (wt%) | The interfacial tension mN/m of ternary system and crude oil |
| ????0.05 | ????2.1×10 -3 |
| ????0.1 | ????1.3×10 -3 |
| ????0.2 | ????1.8×10 -3 |
| ????0.3 | ????8.6×10 -4 |
Annotate: with example 1 example 3: a kind of ternary composite oil-displacing system of mixed surfactant, wherein each major ingredient of mixed surfactant and content are: (wt%)
Sodium alkylarysulfonate: 62
Straight chain sodium lauryl sulphate: 29
Ethylene glycol 6
Virahol 3
Wherein the molecular weight of sodium alkylarysulfonate is 560.This mixed surfactant-polymkeric substance-alkali (Na
2CO
3) ternary composite oil-displacing system and crude oil between form ultra low interfacial tension and see Table 3.
Interfacial tension between table 3 alkali/mixed surfactant/polymeric system and the crude oil
| Mixed surfactant (wt%) | The interfacial tension mN/m of ternary system and crude oil |
| ????0.05 | ????4.6×10 -3 |
| ????0.1 | ????1.4×10 -3 |
| ????0.2 | ????2.3×10 -3 |
| ????0.3 | ????1.1×10 -3 |
Annotate: with example 1
Example 4: a kind of ternary composite oil-displacing system of mixed surfactant, wherein each major ingredient of mixed surfactant and content are: (wt%)
Sodium alkylarysulfonate: 60
Straight chain sodium lauryl sulphate: 30
Ethylene glycol 6
The Virahol 4 wherein molecular weight of sodium alkylarysulfonate is 580.This mixed surfactant-polymkeric substance-alkali (Na
2CO
3) ternary composite oil-displacing system and crude oil between form ultra low interfacial tension and see Table 4.
Interfacial tension between table 4 alkali/mixed surfactant/polymeric system and the crude oil
| Mixed surfactant (wt%) | The interfacial tension mN/m of ternary system and crude oil |
| ????0.05 | ????1.3×10 -3 |
| ????0.1 | ????1.0×10 -3 |
| ????0.2 | ????8.1×10 -4 |
| ????0.3 | ????4.5×10 -4 |
Annotate: with example 1
Example 5: the mixed surfactant polymkeric substance is with example 1.
This mixed surfactant-polymkeric substance-alkali (Na
2CO
3) ternary composite oil-displacing system and crude oil between form ultra low interfacial tension and see Table 5.
Interfacial tension between table 5 alkali/mixed surfactant/polymeric system and the crude oil
Annotate: with example 1
| ????Na 2CO 3(wt％) | The interfacial tension mN/m of ternary system and crude oil |
| ????0.6 | ????3.5×10 -3 |
| ????0.8 | ????4.5×10 -4 |
| ????1.0 | ????5.1×10 -4 |
| ????1.2 | ????3.2×10 -3 |
Wherein mixed surfactant concentration (commodity) is 0.6%
Example 6: the mixed surfactant polymkeric substance is with example 4.
This mixed surfactant-polymkeric substance-alkali (Na
2CO
3) ternary composite oil-displacing system and crude oil between form ultra low interfacial tension and see Table 6.
Interfacial tension between table 6 alkali/mixed surfactant/polymeric system and the crude oil
Annotate: with example 1
| ????Na 2CO 3(wt％) | The interfacial tension mN/m of ternary system and crude oil |
| ????0.6 | ????3.1×10 -3 |
| ????0.8 | ????8.6×10 -4 |
| ????1.0 | ????6.7×10 -4 |
| ????1.2 | ????4.1×10 -3 |
Wherein mixed surfactant concentration (commodity) is 0.4%
Claims (4)
1, the application of a kind of ternary composite oil-displacing system of mixed surfactant in tertiary oil recovery.It is characterized in that: described mixed surfactant is the mixture of sodium alkylarysulfonate and straight chain sodium lauryl sulphate and alcohols, and and Na
2The ternary composite oil-displacing system that the CO polymer formulation becomes the displacement of reservoir oil to use.
2, mixed surfactant according to claim 1 is characterized in that: the molecular weight of sodium alkylarysulfonate is 520-580, is to be concentrated and form through sulfonation, neutralization, extraction by fraction oil.
3, mixed surfactant according to claim 1 is characterized in that: the component and the content of mixed surfactant are as follows: (wt%)
Sodium alkylarysulfonate 50-95
Straight chain sodium lauryl sulphate 0-50
Ethylene glycol 0-10
Virahol 0-10
4, mixed surfactant according to claim 3 and polymkeric substance, alkali are mixed with the ternary injection liquid that the displacement of reservoir oil is used, and each component concentration (wt%) is:
Mixed surfactant (effectively) 0.1-0.3
Polymkeric substance 0-0.2
Na
2CO
3?????????????????????0-1.2
Water (clear water or oily(waste)water are injected in the oil field) 98-99
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|---|---|---|---|
| CN 02103697 CN1439689A (en) | 2002-02-19 | 2002-02-19 | Alkali-mixed surfactant-polymer ternary composite oil displacement system and use thereof |
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|---|---|---|---|
| CN 02103697 CN1439689A (en) | 2002-02-19 | 2002-02-19 | Alkali-mixed surfactant-polymer ternary composite oil displacement system and use thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857801A (en) * | 2010-06-13 | 2010-10-13 | 无锡维视科技有限公司 | Nanometer displacement agent and preparation method thereof |
| CN101927139A (en) * | 2010-07-12 | 2010-12-29 | 孙安顺 | Self-emulsifier and use thereof in tertiary oil recovery |
| US10844275B2 (en) | 2019-03-26 | 2020-11-24 | China University Of Petroleum (East China) | Method for oil displacement using dispersed particle gel-strengthened polymer ternary composite displacement system |
| CN114836188A (en) * | 2022-04-21 | 2022-08-02 | 大庆华理生物技术股份有限公司 | Biological compound oil displacement system and application thereof |
-
2002
- 2002-02-19 CN CN 02103697 patent/CN1439689A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857801A (en) * | 2010-06-13 | 2010-10-13 | 无锡维视科技有限公司 | Nanometer displacement agent and preparation method thereof |
| CN101857801B (en) * | 2010-06-13 | 2013-07-17 | 无锡维视科技有限公司 | Nanometer displacement agent and preparation method thereof |
| CN101927139A (en) * | 2010-07-12 | 2010-12-29 | 孙安顺 | Self-emulsifier and use thereof in tertiary oil recovery |
| CN101927139B (en) * | 2010-07-12 | 2012-05-30 | 孙安顺 | Self-emulsifier and use thereof in tertiary oil recovery |
| US10844275B2 (en) | 2019-03-26 | 2020-11-24 | China University Of Petroleum (East China) | Method for oil displacement using dispersed particle gel-strengthened polymer ternary composite displacement system |
| CN114836188A (en) * | 2022-04-21 | 2022-08-02 | 大庆华理生物技术股份有限公司 | Biological compound oil displacement system and application thereof |
| CN114836188B (en) * | 2022-04-21 | 2023-11-07 | 大庆华理生物技术股份有限公司 | Biological composite oil displacement system and application thereof |
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|---|---|---|---|
| ASS | Succession or assignment of patent right |
Owner name: DAQING OIL FIELD CO., LTD. Free format text: FORMER OWNER: QIN LIJUN Effective date: 20020906 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20020906 Applicant after: Daqing Oil Field Co., Ltd. Applicant before: Qin Lijun |
|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |