CN104673262A - Study on compounded oil expelling agent system of rhamnolipid - Google Patents
Study on compounded oil expelling agent system of rhamnolipid Download PDFInfo
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- CN104673262A CN104673262A CN201310642000.7A CN201310642000A CN104673262A CN 104673262 A CN104673262 A CN 104673262A CN 201310642000 A CN201310642000 A CN 201310642000A CN 104673262 A CN104673262 A CN 104673262A
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- rhamnolipid
- oil
- polymkeric substance
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- conventional surfactant
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- 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
- C09K8/588—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 polymers
Abstract
The invention discloses study on a compounded oil expelling agent system of rhamnolipid. A biological surfactant rhamnolipid is taken as a main oil expelling agent, a conventional surfactant and a polymer are taken as additives which are compounded together, an optimal ratio is determined, an oil expelling experiment is performed, the result shows that in an appropriate compounding ratio, the boundary tension of crude oil-water can be reduced to be super lower in the compounding system, the recovery rate can be increased by 12.3%, and the effect is relatively remarkable. The system comprises the following components in a ratio: rhamnolipid and 3.5% of the surfactant, the concentration of the rhamnolipid in the system is 0.3%, and the concentration of the polymer is 0.6g/L. The viscosity of the compounded system is 21.8mPa.s.
Description
Invention field
The present invention relates to Compositional type oil-displacing agent prepared by a kind of rhamnolipid, belong to field of oilfield chemistry.
Background of invention
Oil is as strategic resource, and it is effectively exploited and utilizes very important.Because oil is nonrenewable resource, along with improving constantly of the level of the productive forces, society sharply rises to petroleum demand, and find that the opportunity of larger reserves oil reservoir reduces again, the recovery ratio of raising developed field is got most of the attention, and taking technique means to improve recovery ratio has become the necessary production measure had a high potential.At present, the most oil field of China is in secondary oil recovery late period, and after recovering the oil through first and second, comprehensive oil recovery factor only has 30%, and the oil of 60% still cannot extraction.Therefore, carrying out tertiary oil recovery, improve oil recovery factor, is slow down most oil fields aging rate, maintenance stable production of crude oil, minimizing China to the strategic requirement of external crude oil degree of dependence.Bio-surfactant has the characteristic reducing profit, interfacial tension, can change rock wettability, and release reservoir rock surface carbon hydrogen compound, is applicable to the exploitation of low permeability pay.Rhamnolipid is the bio-surfactant of a kind of biological metabolism character produced by pseudomonas or Bai Keshi mushroom, also be that a kind of search time is the longest simultaneously, a kind of bio-surfactant that utilisation technology is the most ripe, it all exists in soil, water body and plant, belongs to a kind of glycolipid analog anion surfactants.Daqing oil field 1997 has carried out synthetic surfactant and the composite field test of rhamnolipid (RH) at oil recovery three factory small well spacing, and recovery ratio improves 23.24% than water drive.
Patent of the present invention is in conjunction with the problems referred to above, with rhanolipid as biosurfactant for main oil-displacing agent, making auxiliary agent with conventional surfactant and polymkeric substance carries out composite, determine optimum proportioning, and carried out oil displacement test, result shows, under suitable compound proportion, the interfacial tension of crude water can be down to ultralow by compound system, and raising recovery ratio amplitude can improve 12.3%, and effect is comparatively remarkable.
Summary of the invention
Patent of the present invention relates to the preparation of the ternary oil displacement system utilizing rhamnolipid and conventional surfactant and polymkeric substance composite, it is characterized in that:
Above-mentioned main oil-displacing agent raw material is preferably from: rhamnolipid (grand celebration Wo Taisi company produces, and working substance content is at 30 ~ 40g/L)
Above-mentioned conventional surfactant preferably from: one of sulfonated petro-leum, Sodium dodecylbenzene sulfonate, tetradecyl benzene sulfonic acid sodium salt, cetyl benzenesulfonic acid sodium or combination
Above-mentioned polymkeric substance preferably from: one of the polyacrylic acid of polyacrylic acid, polyacrylamide, hydrophobically modified, the polyacrylamide of hydrophobically modified, xanthan gum or combination.
In the ternary built oil-displacing agent system that the present invention relates to, the ratio of each component is: rhamnolipid: tensio-active agent: (1.0 ~ 8.0), and in system, the concentration of rhamnolipid is: 0.05 ~ 1.5%, and polymer concentration is: 0.1 ~ 1.0g/L.The viscosity of composite rear system is between 20 ~ 30mPas.
Concrete preparation method: be mixed in proportion by above-mentioned sample, to add water in system each concentration of component in above-mentioned scope, comparatively simple possible.
Accompanying drawing explanation
Fig. 1 is under the composite condition of difference, compound system is carried out to the evaluation of Oil Displacing Capacity, wherein experimentation is as follows: experimental temperature is 45 DEG C, rate of displacement is that 0.2mL/min displacement of reservoir oil program adopts rock core oil well produced local water saturation simulation oil (the making irreducible water) water drive in saturation testing district of finding time to terminate to moisture 98%, calculate the rhamnolipid compound system displacement of reservoir oil slug that waterflood recovery efficiency factor injects 0.5Vp (Vp is volume of voids), keep constant temperature extremely moisture 98% end of water drive again, calculate recovery ratio.
As seen from Figure 1, under different composite condition, oil displacement efficiency difference is comparatively remarkable, and oil recovery factor can be improved 12.3% by the standby optimum proportioning oil-displacing agent of patent system of the present invention, and effect is comparatively remarkable.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described, but be not limited only to this.
Embodiment 1: composite oil-displacing agent composition: rhamnolipid: tensio-active agent: 5.5, in system, the concentration of rhamnolipid is: 0.3%, and polymer concentration is: 0.8g/L.The viscosity of composite rear system is at 22.5mPas.
Concrete preparation method: be mixed in proportion by above-mentioned sample, adding water to each concentration of component in system is that embodiment 1 is required.
Embodiment 2: composite oil-displacing agent composition: rhamnolipid: tensio-active agent: 3.5, in system, the concentration of rhamnolipid is: 0.3%, and polymer concentration is: 0.6g/L.The viscosity of composite rear system is at 21.8mPas.
Concrete preparation method is with embodiment 1.
Embodiment 3: rhamnolipid: tensio-active agent: 6.0, in system, the concentration of rhamnolipid is: 0.4%, and polymer concentration is: 1.0g/L.The viscosity of composite rear system is between 25mPas.
Concrete preparation method is with embodiment 1.
Embodiment 4: composite oil-displacing agent composition: rhamnolipid: tensio-active agent: 8.0, in system, the concentration of rhamnolipid is: 0.4%, and polymer concentration is: 0.6g/L.The viscosity of composite rear system is at 20.6mPas.
Concrete preparation method is with embodiment 1.
Claims (5)
1. a preparation for the ternary oil displacement system utilizing rhamnolipid and conventional surfactant and polymkeric substance composite, is characterized in that: above-mentioned main oil-displacing agent raw material is preferably from: rhamnolipid (grand celebration Wo Taisi company produces, and working substance content is at 30 ~ 40g/L).
2. as the above-mentioned ternary oil displacement system utilizing rhamnolipid and conventional surfactant and polymkeric substance composite according to claim 1, above-mentioned conventional surfactant preferably oneself: one of sulfonated petro-leum, Sodium dodecylbenzene sulfonate, tetradecyl benzene sulfonic acid sodium salt, cetyl benzenesulfonic acid sodium or combine.
3. as the above-mentioned ternary oil displacement system utilizing rhamnolipid and conventional surfactant and polymkeric substance composite according to claim 1, above-mentioned polymkeric substance preferably oneself: one of the polyacrylic acid of polyacrylic acid, polyacrylamide, hydrophobically modified, the polyacrylamide of hydrophobically modified, xanthan gum or combine.
4. as the above-mentioned ternary oil displacement system utilizing rhamnolipid and conventional surfactant and polymkeric substance composite according to claim 1, in ternary built oil-displacing agent system, the ratio of each component is: rhamnolipid: tensio-active agent: (1.0 ~ 8.0), in system, the concentration of rhamnolipid is: 0.05 ~ 1.5%, and polymer concentration is: 0.1 ~ 1.0g/L.The viscosity of composite rear system is between 20 ~ 30mPas.
5. as the above-mentioned ternary oil displacement system utilizing rhamnolipid and conventional surfactant and polymkeric substance composite according to claim 1, when recovery ratio increase rate is maximum, each component ratio is: rhamnolipid: tensio-active agent: 3.5, in system, the concentration of rhamnolipid is: 0.3%, and polymer concentration is: 0.6g/L.The viscosity of composite rear system is at 21.8mPas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310642000.7A CN104673262A (en) | 2013-12-03 | 2013-12-03 | Study on compounded oil expelling agent system of rhamnolipid |
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| CN201310642000.7A CN104673262A (en) | 2013-12-03 | 2013-12-03 | Study on compounded oil expelling agent system of rhamnolipid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057670A (en) * | 2016-12-19 | 2017-08-18 | 安捷宇（北京）油田技术服务有限公司 | A kind of biological profile control agent of oilfield exploitation high temperature resistant, high salt |
| CN112974498A (en) * | 2021-02-05 | 2021-06-18 | 北京沃太斯环保科技发展有限公司 | Biological flooding agent for in-situ petroleum hydrocarbon pollution remediation and application thereof |
-
2013
- 2013-12-03 CN CN201310642000.7A patent/CN104673262A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057670A (en) * | 2016-12-19 | 2017-08-18 | 安捷宇（北京）油田技术服务有限公司 | A kind of biological profile control agent of oilfield exploitation high temperature resistant, high salt |
| CN112974498A (en) * | 2021-02-05 | 2021-06-18 | 北京沃太斯环保科技发展有限公司 | Biological flooding agent for in-situ petroleum hydrocarbon pollution remediation and application thereof |
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Application publication date: 20150603 |