致密油藏表面活性剂渗吸影响因素研究

doi:10.3969/j.issn.2097-2806.2023.08.001

日用化学工业（中英文） ›› 2023, Vol. 53 ›› Issue (8): 857-864.doi: 10.3969/j.issn.2097-2806.2023.08.001

• 基础研究 • 下一篇

致密油藏表面活性剂渗吸影响因素研究

徐德荣¹,连威¹,熊金钊¹,康万利^2,^*()

1.中国石油大学（北京）克拉玛依校区石油学院，新疆克拉玛依 834000
2.中国石油大学（华东）石油工程学院，山东青岛 266580

收稿日期:2023-04-10 修回日期:2023-07-18 出版日期:2023-08-22 发布日期:2023-08-28
通讯作者: 康万利
基金资助:
国家自然科学基金青年项目资助(52204062);克拉玛依市创新人才专项资助(20212022hjcxrc0037);中国石油大学（北京）克拉玛依校区科研启动基金资助(XQZX20230013)

Research on the influence factors of surfactant imbibition in tight reservoirs

Xu Derong¹,Lian Wei¹,Xiong Jinzhao¹,Kang Wanli^2,^*()

1. School of Petroleum, China University of Petroleum （Beijing） at Karamay, Karamay, Xinjiang 834000, China
2. School of Petroleum Engineering, China University of Petroleum （East China）, Qingdao, Shandong 266580, China

Received:2023-04-10 Revised:2023-07-18 Online:2023-08-22 Published:2023-08-28
Contact: Wanli Kang

摘要/Abstract

摘要：

致密油藏储层物性差，常规水驱难以对其进行有效开采，表面活性剂渗吸采油是致密油藏开采的主要手段。针对长庆致密露头岩心分别研究了岩石润湿性、表面活性剂类型、界面张力、原油黏度、温度及表面活性剂段塞组合对渗吸效率的影响。结果表明，岩石亲水性越强渗吸效率越高；阴离子表面活性渗吸效率最佳，非离子表面活性剂次之，阳离子表面活性剂最差；当渗吸液油水界面张力为10^-1mN/m时渗吸效率最佳；降低原油黏度及升高温度均有利于渗吸采油；表面活性剂渗吸越早进行效果越好，并且，在非超低界面张力渗吸液体系一次渗吸结束后采用超低界面张力渗吸液体系渗吸能进一步提高渗吸效率。

关键词: 致密油藏, 表面活性剂, 渗吸, 界面张力

Abstract:

Tight reservoirs always show poor physical properties, resulting in difficulties to be effectively exploited by conventional water flooding. Imbibition with surfactant solutions is the main means for exploitation of tight reservoirs. In this work, the effects of rock wettability, surfactant types, interfacial tension （IFT） of imbibition solutions, oil viscosities, temperature and surfactant slug combinations on imbibition efficiencies were studied with Changqing tight outcrop cores by Amott cells. The results showed that, the higher the wettability of the rock was, the higher the imbibition recovery would be obtained. The imbibition recovery of different types of surfactants was decreased in the sequence: anionic surfactants>nonionic surfactants>cationic surfactants. When the oil-water IFT of imbibition liquid was at the level of 10^-1 mN/m, the imbibition efficiency was the highest. Reducing the viscosity of crude oil and increasing temperature were both beneficial to the imbibition recovery. The earlier the surfactant imbibition was carried out, the higher the imbibition efficiency was. In addition, the imbibition efficiency could be further improved by using ultra-low IFT imbibition solution after primary imbibition with non-ultra-low IFT imbibition solutions.

Key words: tight reservoir, surfactant, imbibition, interface tension

中图分类号:

TQ423

徐德荣,连威,熊金钊,康万利. 致密油藏表面活性剂渗吸影响因素研究[J]. 日用化学工业（中英文）, 2023, 53(8): 857-864.

Xu Derong,Lian Wei,Xiong Jinzhao,Kang Wanli. Research on the influence factors of surfactant imbibition in tight reservoirs[J]. China Surfactant Detergent & Cosmetics, 2023, 53(8): 857-864.

图/表 14

参考文献 14

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Parameters	Value
Diameter/cm	2.5±0.1
Length/cm	3±0.1
Porosity/%	9-11
Permeability/mD	0.1-0.3
Median pore radius/μm	0.615

Imbibition solutions	IFT/（mN/m）	Contact angle/ （°）
0.05% SDS	2.13	45
0.05% KD+0.05% SDS	0.11	40
0.2% KD	0.204	37
0.05% KD	0.000 8	45

Simulation oil number	Crude oil content/%	Viscosities/（mPa·s）
Simulation oil number	Crude oil content/%	45 ℃	85 ℃
#1	5	2.1	1.1
#2	80	8.5	2.1

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致密油藏表面活性剂渗吸影响因素研究

Research on the influence factors of surfactant imbibition in tight reservoirs

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