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表面活性剂和弱碱浓度对碱-表面活性剂-聚合物复合体系中O/W乳液稳定性的影响

Influence of Surfactant and Weak-Alkali Concentrations on the Stability of O/W Emulsion in an Alkali-Surfactant-Polymer Compound System.

作者信息

Zhang Jie, Ge Dangke, Wang Xiaoyan, Wang Wei, Cui Dandan, Yuan Guangyu, Wang Keliang, Zhang Wei

机构信息

Production Technology Research Institute, PetroChina Dagang Oilfield, Tianjin 300450, China.

School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China.

出版信息

ACS Omega. 2021 Feb 12;6(7):5001-5008. doi: 10.1021/acsomega.0c06142. eCollection 2021 Feb 23.

DOI:10.1021/acsomega.0c06142
PMID:33644608
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7905936/
Abstract

Emulsions have emerged as advanced materials for wide industrial applications because of their unique properties. In the actual application in oilfields, emulsions can significantly enhance oil recovery. In the present study, the stability test shows that the concentrations of a surfactant and alkali and salinity have a great influence on the stability of the emulsion, but the addition of excessive chemical agents may adversely affect the emulsion stability. The addition of excessive alkali causes the phase inversion behavior of the emulsion to be discovered, which is also the main reason for the destabilization of the oil-in-water emulsion. Rheological experiments reveal that the emulsion produced by the chemical-flooding fluid is a pseudoplastic fluid, and the apparent viscosity decreases with the increase of the shear rate. Core-flooding experiments were conducted to study the effect of the emulsion stability on enhanced oil recovery, and the results indicate that the system with a better emulsion stability has higher oil recovery and displacement pressure.

摘要

由于其独特的性质，乳液已成为广泛工业应用的先进材料。在油田的实际应用中，乳液可以显著提高原油采收率。在本研究中，稳定性测试表明，表面活性剂、碱和盐度的浓度对乳液的稳定性有很大影响，但添加过量的化学剂可能会对乳液稳定性产生不利影响。添加过量的碱会导致乳液出现相转变行为，这也是水包油乳液失稳的主要原因。流变学实验表明，化学驱油流体产生的乳液是假塑性流体，表观粘度随剪切速率的增加而降低。进行了岩心驱替实验以研究乳液稳定性对提高原油采收率的影响，结果表明，乳液稳定性较好的体系具有更高的原油采收率和驱替压力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/d273cdc71e48/ao0c06142_0012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/d273cdc71e48/ao0c06142_0012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/8210662ac39a/ao0c06142_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/0115a88dde0e/ao0c06142_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/8ea4f504d85c/ao0c06142_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/30e4a081a69d/ao0c06142_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/ddd7abea5c19/ao0c06142_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/2ac86c8e55d6/ao0c06142_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/b399188a7686/ao0c06142_0009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0721/7905936/d273cdc71e48/ao0c06142_0012.jpg

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