普通稠油降黏复合驱技术研究与矿场试验

doi:10.3969/j.issn.1006-6535.2024.01.012

特种油气藏 ›› 2024, Vol. 31 ›› Issue (1): 94-100.DOI: 10.3969/j.issn.1006-6535.2024.01.012

普通稠油降黏复合驱技术研究与矿场试验

赵林¹, 郝丽娜¹, 于春生², 张勇¹, 肖梦华¹, 柴细琼¹, 姚江¹, 龚恒圆²

1.中国石化河南油田分公司,河南南阳 473132;
2.西南石油大学,四川成都 610500

收稿日期:2022-07-04 修回日期:2023-12-15 出版日期:2024-02-25 发布日期:2024-04-18
通讯作者: 于春生(1982—),男,副教授,2004年毕业于西南石油学院石油工程专业,2011年毕业于西南石油大学油气田开发工程专业,获博士学位,现从事稠油开发及化学驱提高采收率研究工作。
作者简介:赵林(1982—),男,高级工程师,2006年毕业于辽宁石油化工大学应用化学专业,2009年毕业于该校油田化学专业,获硕士学位,现从事油藏开发、采油工艺技术研究及管理工作。
基金资助:
国家自然科学基金联合基金重点支持项目“黏度可控的原位增黏体系构建及高效驱油机理研究”(U19B2010);四川省科技计划资助项目“油气藏地下原位制氢和温室气体封存利用技术”(2022ZHYZ0007)

Research and Practice of Viscosity-Reducing Composite Flooding Technology for Conventional Heavy Oil Reservoirs

ZhaoLin¹, Hao Li′na¹, Yu Chunsheng², Zhang Yong¹, Xiao Menghua¹, Chai Xiqiong¹, Yao Jiang¹, Gong Hengyuan²

1. Sinopec Henan Oilfield Branch, Nanyang, Henan 473132, China;
2. Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2022-07-04 Revised:2023-12-15 Online:2024-02-25 Published:2024-04-18

摘要/Abstract

摘要： 针对普通稠油油藏水驱采收率低且热采成本高、碳排放量大的问题,基于春光油田低温高盐储层的流体性质,优选了阴离子型降黏剂和耐盐聚合物,通过室内物理模拟实验,明确了热水驱、单一降黏剂驱、复合驱的降水增油机理;建立了降黏复合驱反应动力学方程,在CMG-STARS软件中开发了降黏复合驱数值模拟方法,并优化了春2单元普通稠油降黏复合驱井网、井距及注采方案。研究结果表明:降黏复合驱可以充分发挥驱替相增黏、被驱替相降黏的加和效应,具有体系用量少、碳排放低、提高采收率幅度大等优势;降黏复合驱适合五点法井网,注采井距应小于200 m,在增稠剂质量分数为0.25%、降黏剂质量分数为0.20%的条件下,最佳注入段塞量为0.5倍孔隙体积,注采比为1.05。矿场实践表明,特高含水后期(含水率96.0%)的油井实施降黏复合驱,含水率降幅达30%以上,日增油5 t/d。研究证实了该项技术矿场应用的可行性,可为改善普通稠油开发效果、实现工业减排提供借鉴。

关键词: 普通稠油, 复合驱, 数值模拟, 提高采收率, 春光油田

Abstract: Aiming at the problems of low recovery of water flooding, high cost and high carbon emission of thermal recovery in conventional heavy oil reservoirs, anionic viscosity reducer and salt-resistant polymers were preferred based on the low-temperature and high-salt properties of reservoirs in Chunguang Oilfield. The water cut reduction and oil production increase mechanisms of hot-water flooding, single viscosity reducer flooding, and composite flooding were clarified based on indoor physical simulation experiments. The kinetic equations of the reaction of viscosity-reducing composite flooding were established. The numerical simulation method of viscosity-reducing composite flooding was developed in CMG-STARS software. Well-pattern spacing and injection-production strategy of viscosity-reducing composite flooding were optimized for conventional heavy oil reservoirs in Chun 2 unit. The results show that the viscosity-reducing composite flooding could give full play to the synergistic effect of viscosity enhancement of the displacing phase and viscosity reduction of the displaced phase, and it has the advantages of low system dosage, low carbon emission, and significant recovery enhancement; the viscosity-reducing composite flooding is suitable for five-spot pattern, the injector-producer distance should be less than 200 m; the optimal injection slug volume is 0.5 times of the pore volume and the injection to production ratio is 1.05 with the mass fraction of the viscosity-reducing agent at 0.25%. Practice shows that the water cut in wells was reduced by more than 30%, and the daily oil production was increased by 5 t/d after the viscosity-reducing composite flooding was implemented in extra-high water cut (water cut of 96%) reservoir at the late stage. This study confirms the feasibility of this technology applied in the field. It provides a reference to improve the effect of the development of conventional heavy oil reservoirs and realize the reduction of industrial emissions.

Key words: conventional heavy oil, composite flooding, numerical simulation, enhanced oil recovery, Chunguang Oilfield

中图分类号:

TE357.46

赵林, 郝丽娜, 于春生, 张勇, 肖梦华, 柴细琼, 姚江, 龚恒圆. 普通稠油降黏复合驱技术研究与矿场试验[J]. 特种油气藏, 2024, 31(1): 94-100.

ZhaoLin, Hao Li′na, Yu Chunsheng, Zhang Yong, Xiao Menghua, Chai Xiqiong, Yao Jiang, Gong Hengyuan. Research and Practice of Viscosity-Reducing Composite Flooding Technology for Conventional Heavy Oil Reservoirs[J]. Special Oil & Gas Reservoirs, 2024, 31(1): 94-100.

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普通稠油降黏复合驱技术研究与矿场试验

Research and Practice of Viscosity-Reducing Composite Flooding Technology for Conventional Heavy Oil Reservoirs

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