Evaluation of OB-2 system for W/O emulsifier and displacement experiments research at high temperature reservoir in high water cut period

Pu Wanfen; Mei Zilai; Yang Yang; Wang Duo; Shen Chao; Chen Pei

doi:10.13809/j.cnki.cn32-1825/te.2019.01.008

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Evaluation of OB-2 system for W/O emulsifier and displacement experiments research at high temperature reservoir in high water cut period

更新时间：2025-12-05

- Evaluation of OB-2 system for W/O emulsifier and displacement experiments research at high temperature reservoir in high water cut period
- Petroleum Reservoir Evaluation and Development Vol. 9, Issue 1, Pages: 38-43(2019)
- 作者机构：
  
  1. 西南石油大学油气藏地质与开发工程国家重点实验室,四川,成都,610500
  2. 中国石油新疆油田分公司百口泉采油厂,新疆,克拉玛依,834000
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2019.01.008
  CLC： E39
- Published：2019
- 稿件说明：
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Pu Wanfen, Mei Zilai, Yang Yang, et al. Evaluation of OB-2 system for W/O emulsifier and displacement experiments research at high temperature reservoir in high water cut period[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(1): 38-43.
DOI：

Pu Wanfen, Mei Zilai, Yang Yang, et al. Evaluation of OB-2 system for W/O emulsifier and displacement experiments research at high temperature reservoir in high water cut period[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(1): 38-43. DOI： 10.13809/j.cnki.cn32-1825/te.2019.01.008.

摘要

针对如何在水驱后进一步开发高含水高温油藏

提出了一种表面活性剂就地乳化驱油技术

对油包水（W/O）型乳化剂OB-2体系进行了乳化特性评价及乳状液驱油研究。研究结果表明

随着乳化剂浓度增大

乳液黏度先增大后减小;对于X油藏原油

乳化剂最佳浓度为0.3wt%

在此浓度下

油水界面张力可降低至10

-2

mN/m数量级;在水油体积比低于7∶3时

乳化剂OB-2可促使油水两相完全乳化

形成高黏度的W/O型乳液

其中

水油体积比为7∶3时乳液黏度最大

增黏率高达370 %。岩心驱油实验结果表明

均质条件下

水驱后注入0.3PV乳化剂OB-2体系

可提高原油采收率达26.15 %;非均质条件下

该乳化体系可在级差低于7.6时表现出良好的流度控制及非均质调控能力

扩大波及体积。

Abstract

Aim ed at how to develop high temperature reservoir after water flooding

we proposed the in-situ emulsion flooding by injecting surfactant solutions to evaluate the emulsifying property and study on the oil displacement by the emulsion of the OB-2 system for the W/O（water in oil）emulsifier. The results showed that the emulsion viscosity firstly increased and then decreased along with emulsifier concentration. For oil in reservoir-X

the optimal emulsifier concentration was 0.3 wt% at which could make the interfacial tension reduce to 10

-2

mN/m order of magnitude. When the water-oil ratio was lower than 7∶3

the complete emulsification of oil-water happened and th

e W/O emulsion with high viscosity would form. The maximum emulsion viscosity appearde when the oil-water ratio was 7∶3

with the viscosity increasing rate of as high as 370 %. The results of emulsion flooding indicated that the recovery factor of the homogeneous core could increase another 26.15 % after water flooding by injecting 0.3PV OB-2 system. On the other hand

when the permeability ratio of parallel cores was lower than 7.6

applying the OB-2 system could achieve good mobility control and heterogeneity regulation.

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