CN104673265A - Research of binary compounding system capable of generating ultralow interfacial tension - Google Patents
Research of binary compounding system capable of generating ultralow interfacial tension Download PDFInfo
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- CN104673265A CN104673265A CN201310643726.2A CN201310643726A CN104673265A CN 104673265 A CN104673265 A CN 104673265A CN 201310643726 A CN201310643726 A CN 201310643726A CN 104673265 A CN104673265 A CN 104673265A
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Abstract
The invention relates to research of a binary compounding system capable of generating an ultralow interfacial tension, and relates to a binary oil-displacing agent which is obtained by using a conventional anionic surfactant to compound with a series of laboratory synthesized quaternary ammonium salt type gemini surfactants of 10-20-10, 12-2-12, 16-4-16 and the like, wherein the oil-water interfacial tensions of the conventional anionic surfactant and the laboratory synthesized quaternary ammonium salt type gemini surfactants are tested, and the results show that the gemini surfactants with suitable structures and the conventional anionic surfactant can reduce the interfacial tension between crude oil and water to an ultralow value at a specific compounding proportion and show relatively good interfacial activity; and the oil-water interfacial tension of the binary oil-displacing agent obtained after compounding the gemini surfactants with the conventional anionic surfactant can be as low as E-4mN/m, and the binary oil-displacing agent shows relatively good interfacial activity, and has a relatively good application prospect in the aspect of improving the crude oil recovery ratio.
Description
Invention field
The present invention relates to a kind of research that can produce the binary built system of ultra low interfacial tension, belong to technical 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.Research has for many years proposed multiple intensified oil reduction technology, and wherein chemical process is as polymer flooding, caustic waterflooding, surfactant flooding, alkali/Surfactant/Polymer combination flooding, is develop to improve recovery efficiency technique faster.
The tensio-active agent being applied to the displacement of reservoir oil at present mainly contains sulfonated petro-leum, carboxylate salt, APG and Anionic Gemini Surfactant, latter two due to cost comparatively Gao Erwei be promoted, the salt tolerance of carboxylate fluorocarbon surfactant is poor, adsorption losses is larger, and raw material composition is complicated, different batches product performance also have larger difference, and therefore sulfonate is surfactant oil displacement most widely used at present.But because the interfacial activity of sulfonated petro-leum is not ideal enough, oil water interfacial tension can not be down to ultralow, therefore often need to add cosurfactant.Find part replace or replace sulfonate surfactant completely, be the development target of high-efficient oil-displacing agent always.
Can oil water interfacial tension be down to ultralow (10
-3mN.m
-1), be the important indicator of screening chemical oil displacement agent.The height of oil water interfacial tension, depends on the molecular composition in interfacial layer, and the hydrophobicity of oil phase is stronger, and larger with aqueous phase difference, interfacial tension is higher.Tensio-active agent is in water-oil interface absorption and enrichment, and hydrophilic group stretches to aqueous phase, and oleophilic group stretches to oil phase, interfacial energy is reduced greatly, interfacial tension lowering.Tensio-active agent reduces the ability of oil water interfacial tension, both relevant with the molecular structure of tensio-active agent, forms again relevant with envrionment conditions with oil phase.
Gemini surface active agent is the more class novel surfactant of Recent study, be by chemical bond by two or more identical or different single surfactant monomers hydrophilic group or near hydrophilic head base with the class tensio-active agent connecting base two groups are coupled together.This kind of tensio-active agent, due to the singularity of its structure, shows various different performance.
Patent of the present invention is in conjunction with on the basis of the problems referred to above, a series of quaternary ammonium salt such as 10-2-10,12-2-12,16-4-16 Gemini surface active agent utilizing conventional anion type tensio-active agent and laboratory to synthesize carries out composite, and it is carried out to the measurement of oil water interfacial tension, result shows that the interfacial tension between crude oil and water can be down to ultralow by the Gemini surface active agent that structure is suitable and conventional anion tensio-active agent under specific compound proportion, shows good interfacial activity.
Summary of the invention
Patent of the present invention relate to a kind of conventional anion type tensio-active agent and symmetry quaternary ammonium salt type gemini surfactant composite, preparation can produce the binary built oil-displacing agent of ultra low interfacial tension.
Technical scheme of the present invention is as follows:
A binary built flooding system for ultra low interfacial tension can be produced, it is characterized in that utilizing symmetric form quaternary ammonium salt Gemini surface active agent and conventional anion type tensio-active agent to carry out composite, wherein:
Aniorfic surfactant preferably from: one of sulfonated petro-leum, SDS, sodium laurylsulfonate, Sodium dodecylbenzene sulfonate, tetradecyl benzene sulfonic acid sodium salt or combination
Laboratory synthesis quaternary ammonium salt type gemini surfactant preferably from: one of 10-2-10,12-2-12,12-4-12,16-4-16 or combination
The present invention relates to and a kind ofly can produce the Gemini surface active agent of ultra low interfacial tension and the research of conventional anion type surfactant compound system, step is as follows:
Be 0.8 ~ 2.5 to mix in molar ratio by Gemini surface active agent and anion surfactant, the total concn adding water to tensio-active agent in system is 0.2 ~ 0.8%, stirs the binary built oil-displacing agent that can obtain patent of the present invention and relate to.
The binary system that patent of the present invention relates to composite, choose polar head good hydrophilic property, interfacial adsorption trend is strong, the symmetric form Gemini surface active agent that interface saturated extent of adsorption is large and the aniorfic surfactant that interface performance is good, adsorption losses is little carry out composite.The advantage of the two organically combined, two kinds of tensio-active agents form mixed micellazation solution under finite concentration and specific proportioning, its water-oil interface adsorption tendency is strengthened, oil water interfacial tension is declined.
Accompanying drawing explanation
Fig. 1 is oil/water interfacial tension change curve in time.Use the embodiment of the present invention 1 oil-displacing agent respectively, adopt TEXAS-500 to rotate and drip interfacial tensimeter, measure oil/water interfacial tension over time, obtain INTERFACIAL TENSION CURVES.Oil phase adopts Shengli Oil Field to win mouthful crude oil that sticks together.
Fig. 2 uses the embodiment of the present invention 2 oil-displacing agent respectively, adopts TEXAS-500 to rotate and drips interfacial tensimeter, measure oil/water interfacial tension over time, obtain INTERFACIAL TENSION CURVES.Oil phase adopts Shengli Oil Field to win mouthful crude oil that sticks together.
Fig. 3 uses the embodiment of the present invention 3 oil-displacing agent respectively, adopts TEXAS-500 to rotate and drips interfacial tensimeter, measure oil/water interfacial tension over time, obtain INTERFACIAL TENSION CURVES.Oil phase adopts Shengli Oil Field to win mouthful crude oil that sticks together.
Fig. 4 is that oil-displacing agent of the present invention adopts the western crude oil of Shengli Oil Field stake, uses TEXAS-500 to rotate and drips interfacial tensimeter, measure the western crude oil/water interface of stake over time, obtain INTERFACIAL TENSION CURVES.
As can be seen from above-described embodiment figure, the oil water interfacial tension of crude water can be down to ultralow by the binary built system that patent of the present invention relates to, and with the growth of monomeric hydrophobic chain, interfacial tension reduces gradually, carrying out composite with conventional surfactant after 12-12-12/16-4-16 is composite, crude water interfacial tension can be down to E-4mN/m, show good interfacial activity, in tertiary oil recovery, have good application prospect.
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: A, 10-2-10 B, sulfonated petro-leum
In 20000ppm local water, be 0.95 above-mentioned tensio-active agent to be mixed according to mol ratio, total concn in system is made to be 0.3%, TEXAS-500 is rotated an interfacial tensimeter and is adjusted to 40 DEG C, the sample hose filling previous solu is put into, after stablizing half an hour, about 1 microlitre oil from Shengli oil field is added with microsyringe, under rotating speed is 6000 revs/min, read interfacial tension at regular intervals, INTERFACIAL TENSION CURVES as shown in Figure 1.
Embodiment 2: composite oil-displacing agent composition: A, 12-2-12 B, Sodium dodecylbenzene sulfonate
Concrete preparation method is with embodiment 1.
Embodiment 3: composite oil-displacing agent composition: A, 16-4-16 B, Sodium dodecylbenzene sulfonate
Concrete preparation method is with embodiment 1.
Embodiment 4: composite oil-displacing agent composition: A, 12-12-12/16-4-16 B, Sodium dodecylbenzene sulfonate
Concrete preparation method is with embodiment 1.
Claims (4)
1. can produce a binary built flooding system for ultra low interfacial tension, it is characterized in that utilizing symmetric form quaternary ammonium salt Gemini surface active agent and conventional anion type tensio-active agent to carry out composite.
2. as the above-mentioned binary built flooding system that can produce ultra low interfacial tension according to claim 1, wherein: aniorfic surfactant is preferably from one of sulfonated petro-leum, SDS, sodium laurylsulfonate, Sodium dodecylbenzene sulfonate, tetradecyl benzene sulfonic acid sodium salt or combination.
3. as the above-mentioned binary built flooding system that can produce ultra low interfacial tension according to claim 1, Gemini surface active agent is the homemade quaternary from laboratory preferably: one of 10-2-10,12-2-12,12-4-12,16-4-16 or combination.
4., as the above-mentioned binary built flooding system that can produce ultra low interfacial tension according to claim 1, Gemini surface active agent and anion surfactant are 0.8 ~ 2.5 in molar ratio, and the total concn adding water to tensio-active agent in system is 0.2 ~ 0.8%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107502331A (en) * | 2017-07-14 | 2017-12-22 | 陕西森瑞石油技术开发有限公司 | A kind of shale oil fracturing fluid crude oil extractant and preparation method and application |
| CN108314999A (en) * | 2017-01-17 | 2018-07-24 | 中国石油化工股份有限公司 | The method for efficiently improving oil recovery factor |
-
2013
- 2013-12-03 CN CN201310643726.2A patent/CN104673265A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314999A (en) * | 2017-01-17 | 2018-07-24 | 中国石油化工股份有限公司 | The method for efficiently improving oil recovery factor |
| CN108314999B (en) * | 2017-01-17 | 2021-05-11 | 中国石油化工股份有限公司 | Method for efficiently improving crude oil recovery ratio |
| CN107502331A (en) * | 2017-07-14 | 2017-12-22 | 陕西森瑞石油技术开发有限公司 | A kind of shale oil fracturing fluid crude oil extractant and preparation method and application |
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Application publication date: 20150603 |