CN104312564A - Salt-tolerant high temperature resistant oil displacing agent for tertiary oil recovery - Google Patents
Salt-tolerant high temperature resistant oil displacing agent for tertiary oil recovery Download PDFInfo
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- CN104312564A CN104312564A CN201410456051.5A CN201410456051A CN104312564A CN 104312564 A CN104312564 A CN 104312564A CN 201410456051 A CN201410456051 A CN 201410456051A CN 104312564 A CN104312564 A CN 104312564A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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Abstract
The invention discloses a salt-tolerant high temperature resistant oil displacing agent for tertiary oil recovery. The oil displacing agent is composed of the following components in parts by weight: 10 to 15 parts of alkyl phenylalkyl sulfonate, 15 to 18 parts of modified betaine, 1.5 to 2 parts of anion gemini surfactant, 2.5 to 3 parts of co-surfactant, and 62 to 71 parts of water. The oil displacing agent can reach an interface tension between oil and water of 10<-3> mN/m when the concentration of the oil displacing agent is 0.3-0.4%. So an alkaline substance is not added, and the harms brought by the alkaline substance are avoided. The petroleum exploitation becomes sustainable. The oil displacing agent can be applied to tertiary oil recovery in oil fields with high temperature, high salt content, and high hard water content. The salinity tolerance can reach 15%, the hard water tolerance can reach 0.6%, and the recovery ratio is increased by 15% or more.
Description
Technical field
The present invention relates to field of petroleum exploitation, be specifically related to a kind of salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery.
Background technology
Along with the continuous exploitation of oil, China's oil field majority has entered High water cut, hyposmosis, viscous crude, high temperature, high salt mining period, and residue oil reservoir is distributed in the larger place of the exploitation difficulty such as the extremely strong carbonate rock fractured cave of heterogeneous body.Therefore in the tertiary oil recovery technology of existing development, generally adopt various tensio-active agents newly developed to use as oil-displacing agent, by composite with polymkeric substance etc., thus improve oil displacement efficiency and sweep efficiency, but the oil-displacing agent of existing surfactant formulatory, all there is certain deficiency in oil displacement efficiency, sweep efficiency and oil resistant field high temperature, high salt, performance of hard water.
Summary of the invention
The object of the present invention is to provide a kind of salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery, it can effectively improve oil displacement efficiency and sweep efficiency, can be applied to the tertiary oil recovery in high temperature, high salt, high hardness degree oil field.
For achieving the above object, the present invention adopts following technical scheme to implement:
A kind of salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery, it is by the Dialkylbenzene sulphonate of 10 ~ 15 weight parts, the modified betaine of 15 ~ 18 weight parts, the anionic gemini surfactant of 1.5 ~ 2 weight parts, the cosurfactant of 2.5 ~ 3 weight parts and the water mixing of 62 ~ 71 weight parts are formed;
Modified betaine is that polyoxyethylated carboxybetaine and TriMethylolPropane(TMP) reaction are obtained, and reaction mechanism is:
Wherein: n=12 ~ 14.
Certain those of ordinary skill in the art can according to above-mentioned disclosed reaction mechanism, chooses corresponding material ratio and temperature of reaction to obtain the production rate of best trimethyl-glycine modifier.For Dialkylbenzene sulphonate, Gemini surface active agent, the choosing of cosurfactant raw material, those of ordinary skill in the art can use according to the existing corresponding raw material used in Flooding Agent for EOR.
Above-mentioned disclosed modified betaine and Dialkylbenzene sulphonate, Gemini surface active agent are arranged in pairs or groups three oil-displacing agents be mixed with mutually, it can be used for the exploitation of High water cut, hyposmosis, viscous crude, high temperature, high salt form oil reservoir, improve oil displacement efficiency and sweep efficiency, increase recovery ratio, the tertiary oil recovery in high temperature, high salt, high hardness oil field can be applied to.
Further scheme is:
Dialkylbenzene sulphonate is dodecylbenzene alkylsulfonate;
Gemini surface active agent is the two benzene sulfonate Gemini surface active agent of bis ether; Such as can be: 2,2-bis-(4-alkoxyl group-3-benzene sulfonic acid sodium salt) propane;
Cosurfactant is C3 ~ C4 alcohol.
In technical scheme provided by the invention, on the basis realizing goal of the invention, still certain difference is there is between the oil-displacing agent performance of each preparation of raw material of different deal number, for ensureing that oil displacement efficiency, sweep efficiency and recovery ratio reach best, the present invention preferably adopts following concrete scheme to implement, and it can improve displacement of reservoir oil rate 0.065 ~ 0.072 percentage point.
That is: oil-displacing agent is by the Dialkylbenzene sulphonate of 12 weight parts, the modified betaine of 16 weight parts, the Gemini surface active agent of 1.8 weight parts, and the cosurfactant of 2.6 weight parts and the water mixing of 68 weight parts are formed.
The oil-displacing agent of such scheme composition can be used alone when not adding alkali, can reach 10 when less concentration
-3the ability of the oil/water interfacial tension of mN/m, thus avoid and add the injury of alkaline body to oil reservoir, be conducive to the Sustainable development of oil production.Oil-displacing agent provided by the invention can save consumption 2.2 ~ 2.4% relative to the general oil-displacing agent be made up of common heavy alkyl sulfonate, trimethyl-glycine and Gemini surface active agent, oil displacement efficiency improves about 0.4 ~ 0.45 percentage point, can be used for the tertiary oil recovery in high temperature, high salt, high hardness degree oil field, the tolerance of salinity reaches 15% (massfraction in the sodium-chlor in water body), and the degree of resistance to hard water reaches 0.6% (massfraction in the calcium carbonate in water body).
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention the scope of claim request protection.Raw material used in following examples is all bought by commercial channel if no special instructions and is obtained.
In embodiment 1 ~ 3, the concrete composition of each raw material used is as follows respectively:
Modified betaine is that polyoxyethylated carboxybetaine and TriMethylolPropane(TMP) reaction are obtained, and reaction mechanism is:
Wherein: n=12 ~ 14.
In above-mentioned reaction, the reaction mol ratio 3.5:1 of modified betaine and TriMethylolPropane(TMP), the temperature of reaction is 60 ~ 70 DEG C.
Dialkylbenzene sulphonate is dodecylbenzene alkylsulfonate; Gemini surface active agent is 2,2-bis-(4-alkoxyl group-3-benzene sulfonic acid sodium salt) propane; Cosurfactant is C3 ~ C4 alcohol.
Embodiment 1
Take the Dialkylbenzene sulphonate of 10 weight parts, the modified betaine of 18 weight parts and the Gemini surface active agent of 1.5 weight parts add in reactor and mix, and the water of the cosurfactant and 62 weight parts that then add 3 weight parts is stirred to evenly obtained oil-displacing agent.
Above-mentioned obtained oil-displacing agent is added in the underground water and blends of crudes of simulating Hebei Renqiu oil extraction in oil field operating mode, measure the interfacial tension between crude oil/local water and recovery ratio, when to record oil-displacing agent mass concentration be 0.048g/L, interfacial tension 1.02 × 10 between crude oil/local water
-3mN/m, oil recovery is 16.8%, and the oil-displacing agent of oil recovering break milk separation can be degraded.
Embodiment 2
Take the Dialkylbenzene sulphonate of 12 weight parts, the modified betaine of 16 weight parts and the Gemini surface active agent of 1.8 weight parts add in reactor and mix, and the water of the cosurfactant and 68 weight parts that then add 2.6 weight parts is stirred to evenly obtained oil-displacing agent.
Above-mentioned obtained oil-displacing agent is added in the underground water and blends of crudes of simulating Hebei Renqiu oil extraction in oil field operating mode, measure the interfacial tension between crude oil/local water and recovery ratio, when to record oil-displacing agent mass concentration be 0.0365g/L, interfacial tension 1.38 × 10 between crude oil/local water
-3mN/m, oil recovery is 16.5%, and the oil-displacing agent of oil recovering break milk separation can be degraded.
Embodiment 3
Take the Dialkylbenzene sulphonate of 15 weight parts, the modified betaine of 15 weight parts and the Gemini surface active agent of 2 weight parts add in reactor and mix, and the water of the cosurfactant and 71 weight parts that then add 2.5 weight parts is stirred to evenly obtained oil-displacing agent.
Above-mentioned obtained oil-displacing agent is added in the underground water and blends of crudes of simulating Hebei Renqiu oil extraction in oil field operating mode, measure the interfacial tension between crude oil/local water and recovery ratio, when to record oil-displacing agent mass concentration be 0.0272g/L, interfacial tension 1.75 × 10 between crude oil/local water
-3mN/m, oil recovery is 15.5%, and the oil-displacing agent of oil recovering break milk separation can be degraded.
Claims (6)
1. a salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery, it is by the Dialkylbenzene sulphonate of 10 ~ 15 weight parts, the modified betaine of 15 ~ 18 weight parts, the anionic gemini surfactant of 1.5 ~ 2 weight parts, the cosurfactant of 2.5 ~ 3 weight parts and the water mixing of 62 ~ 71 weight parts are formed;
Modified betaine is that polyoxyethylated carboxybetaine and TriMethylolPropane(TMP) reaction are obtained, and reaction mechanism is:
Wherein: n=12 ~ 14.
2. salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery as claimed in claim 1, is characterized in that: Dialkylbenzene sulphonate is dodecylbenzene alkylsulfonate.
3. salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery as claimed in claim 1 or 2, is characterized in that: Gemini surface active agent is the two benzene sulfonate Gemini surface active agent of bis ether.
4. salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery as claimed in claim 1, is characterized in that: cosurfactant is C3 ~ C4 alcohol.
5. high temperature resistance oil-displacing agent used for tertiary oil recovery as claimed in claim 3, is characterized in that: the two benzene sulfonate anionic Gemini surface active agent of bis ether is 2,2-bis-(4-alkoxyl group-3-benzene sulfonic acid sodium salt) propane.
6. salt tolerant high temperature resistance oil-displacing agent used for tertiary oil recovery as claimed in claim 1 or 2 or 3 or 4, it is characterized in that: oil-displacing agent is by the Dialkylbenzene sulphonate of 12 weight parts, the modified betaine of 16 weight parts, the Gemini surface active agent of 1.8 weight parts, the cosurfactant of 2.6 weight parts and the water mixing of 68 weight parts are formed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112251210A (en) * | 2020-10-29 | 2021-01-22 | 大庆轩隆化工有限公司 | Preparation method of surfactant for universality improvement of crude oil recovery rate |
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| CN101665685A (en) * | 2009-09-14 | 2010-03-10 | 天津师范大学 | Oil-displacing agent for enhancing crude oil recovery efficiency in tertiary recovery |
| CN102277146A (en) * | 2010-06-11 | 2011-12-14 | 中国石油化工股份有限公司 | Composition for improving recovery ratio substantially and preparation method thereof |
| CN102276822A (en) * | 2010-06-11 | 2011-12-14 | 中国石油化工股份有限公司 | Alkylphenol polyoxyethylene ether hydroxyl sulfonate type betaine and preparation method thereof |
| CN102703048A (en) * | 2012-04-26 | 2012-10-03 | 合肥新星油田化学剂有限责任公司 | Efficient salt-tolerant high-temperature-resistant oil displacement agent for heavy oil reservoirs and preparation method thereof |
| WO2013186110A1 (en) * | 2012-06-11 | 2013-12-19 | Basf Se | Method of recovering oil from a subterranean formation |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665685A (en) * | 2009-09-14 | 2010-03-10 | 天津师范大学 | Oil-displacing agent for enhancing crude oil recovery efficiency in tertiary recovery |
| CN102277146A (en) * | 2010-06-11 | 2011-12-14 | 中国石油化工股份有限公司 | Composition for improving recovery ratio substantially and preparation method thereof |
| CN102276822A (en) * | 2010-06-11 | 2011-12-14 | 中国石油化工股份有限公司 | Alkylphenol polyoxyethylene ether hydroxyl sulfonate type betaine and preparation method thereof |
| CN102703048A (en) * | 2012-04-26 | 2012-10-03 | 合肥新星油田化学剂有限责任公司 | Efficient salt-tolerant high-temperature-resistant oil displacement agent for heavy oil reservoirs and preparation method thereof |
| WO2013186110A1 (en) * | 2012-06-11 | 2013-12-19 | Basf Se | Method of recovering oil from a subterranean formation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112251210A (en) * | 2020-10-29 | 2021-01-22 | 大庆轩隆化工有限公司 | Preparation method of surfactant for universality improvement of crude oil recovery rate |
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