交联聚醚破乳剂对胜利油田二元驱采出液破乳性能研究

doi:10.3969/j.issn.2097-2806.2024.07.006

日用化学工业（中英文） ›› 2024, Vol. 54 ›› Issue (7): 795-802.doi: 10.3969/j.issn.2097-2806.2024.07.006

交联聚醚破乳剂对胜利油田二元驱采出液破乳性能研究

孙立梅¹,何海峰²,安申法¹,栾智勇¹,孙鹏³,王阳¹,严峰^4,^*()

1.中国石油化工股份有限公司胜利油田分公司石油工程技术研究院，山东东营 257000
2.中国石油化工股份有限公司胜利油田分公司孤东采油厂，山东东营 257000
3.中国石油化工股份有限公司胜利油田分公司海洋采油厂，山东东营 257000
4.天津工业大学化学学院，天津 300387

收稿日期:2023-08-14 修回日期:2024-06-28 出版日期:2024-07-22 发布日期:2024-07-26
基金资助:
中国石油化工股份有限公司项目(322035);中国石油化工股份有限公司胜利油田分公司项目(YC2201)

Study on the emulsion-breaking performance of cross-linked polyether demulsifiers for the emulsion produced by surfactant/polymer flooding in Shengli oilfield

Limei Sun¹,Haifeng He²,Shenfa An¹,Zhiyong Luan¹,Peng Sun³,Yang Wang¹,Feng Yan^4,^*()

1. Petroleum Engineering and Technology Institute of Shengli Oilfield Branch Company, SINOPEC, Dongying, Shandong 257000, China
2. Gudong Oil Production Plant of Shengli Oilfield Branch Company, SINOPEC, Dongying, Shandong 257000, China
3. Haiyang Oil Production Plant of Shengli Oilfield Branch Company, SINOPEC, Dongying, Shandon 257000, China
4. School of Chemistry, Tiangong University, Tianjin 300387, China

Received:2023-08-14 Revised:2024-06-28 Online:2024-07-22 Published:2024-07-26
Contact: *E-mail: yanfeng@tiangong.edu.cn.

摘要/Abstract

摘要：

针对胜利油田二元驱采出液存在的破乳困难问题，将脱水型聚醚破乳剂（BP01，TA01和PA08）与清水型聚醚破乳剂（PEI01）交联，制备出交联聚醚破乳剂D-BP，D-TA和D-PA，研究了交联聚醚破乳剂的界面活性和对油水界面膜强度的影响，以及对二元驱采出液的破乳效果。结果表明，在三种交联聚醚破乳剂中，具有超支化结构的D-PA在油水界面上的吸附作用力最强，界面活性最高；D-PA对稀释原油与采出水油水界面膜的影响最大，其吸附在油水界面后形成的界面膜的扩张模量最低。D-PA破乳剂对W/O乳状液的脱水率达到94.4%，对O/W乳状液的除油率达到98.1%。更为重要的是，其能同步处理含W/O和O/W复杂乳状液。D-PA对含W/O和O/W复杂乳状液的综合脱水率高于98%，处理后污水含油低于30 mg/L，游离态聚合物保留率达到了94.8%，油水界面整齐，无乳化中间层，表现出良好的破乳效果。

关键词: 二元驱采出液, 交联聚醚破乳剂, 破乳, 聚合物

Abstract:

In view of the difficulties in breaking the emulsion produced by surfactant/polymer flooding in Shengli oilfield, the cross-linked polyether demulsifiers D-BP, D-TA and D-PA were prepared by cross-linking polyether demulsifiers with dewatering function for water-in-oil （W/O） emulsion and polyether demulsifier with oil-removal function for oil-in-water （O/W） emulsion. The interfacial activities of the three cross-linked polyether demulsifiers were investigated. Their effects on the oil-water interfacial film of emulsions were examined, and their emulsion-breaking effects on W/O and O/W emulsions were explored. The results showed that among the three cross-linked polyether demulsifiers, D-PA with hyperbranched structure had the strongest adsorption at the oil-water interface and showed the highest interfacial activity. D-PA had the greatest effect on the oil-water interfacial film formed by the kerosene-diluted crude oil and produced water. The new film formed after D-PA adsorption at the oil-water interface had the lowest interfacial dilatational modulus. The dewatering rate of W/O emulsion by D-PA was 94.4%, and the oil removal rate for O/W emulsion from the same oilfield reached 98.1%. More importantly, the D-PA demulsifier was capable of simultaneously treating complex emulsions containing W/O and O/W types. The comprehensive dewatering rate by D-PA for the emulsion produced by surfactant/polymer flooding containing W/O and O/W was above 98%, and the oil content of the effluent after treated was less than 30 mg/L. The retention rate of polymer （HPAM） reached 94.8%, and the oil-water interface was neat and without emulsified intermediate layer.

Key words: produced liquid of surfactant/polymer flooding, cross-linked polyether demulsifier, emulsion breaking, polymer

中图分类号:

TE357.6

孙立梅, 何海峰, 安申法, 栾智勇, 孙鹏, 王阳, 严峰. 交联聚醚破乳剂对胜利油田二元驱采出液破乳性能研究[J]. 日用化学工业（中英文）, 2024, 54(7): 795-802.

Limei Sun, Haifeng He, Shenfa An, Zhiyong Luan, Peng Sun, Yang Wang, Feng Yan. Study on the emulsion-breaking performance of cross-linked polyether demulsifiers for the emulsion produced by surfactant/polymer flooding in Shengli oilfield[J]. China Surfactant Detergent & Cosmetics, 2024, 54(7): 795-802.

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交联聚醚破乳剂对胜利油田二元驱采出液破乳性能研究

Study on the emulsion-breaking performance of cross-linked polyether demulsifiers for the emulsion produced by surfactant/polymer flooding in Shengli oilfield

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