海上聚合物驱疏松砂岩稠油油藏窜流通道分级表征方法

doi:10.3969/j.issn.1006-6535.2025.01.014

特种油气藏 ›› 2025, Vol. 32 ›› Issue (1): 120-126.DOI: 10.3969/j.issn.1006-6535.2025.01.014

海上聚合物驱疏松砂岩稠油油藏窜流通道分级表征方法

张鹏¹, 未志杰^2,3, 刘玉洋^2,3, 崔永正^2,3, 雍唯^2,3, 张健^2,3, 周文胜^2,3

1.中海石油(中国)有限公司勘探开发部,北京 100010;
2.海洋油气高效开发全国重点实验室,北京 102299;
3.中海油研究总院有限责任公司,北京 102299

收稿日期:2023-08-21 修回日期:2024-09-18 出版日期:2025-02-25 发布日期:2025-05-13
作者简介:张鹏(1977—),男,高级工程师,1997年毕业于西南石油学院石油工程专业,2000年毕业于该校油气田开发专业,获硕士学位,现主要从事海上油田提高采收率技术研究。
基金资助:
国家自然科学基金面上项目“基于非均衡理论的海上稠油化学驱大幅提高采收率关键问题研究”(52074347);中国海洋石油有限公司“十四五”重大课题“海上油田化学驱规模化应用关键技术”(KJGG2021-0504);中国海洋石油集团有限公司“海洋油气高效开发全国重点实验室主任基金(2024)”(KJQZ-2024-2101)

Study on the hierarchical characterization method of breakthrough flow channels in offshore unconsolidated sandstone heavy oil reservoirs driven by polymer flooding

ZHANG Peng¹, WEI Zhijie^2,3, LIU Yuyang^2,3, CUI Yongzheng^2,3, YONG Wei^2,3, ZHANG Jian^2,3, ZHOU Wensheng^2,3

1. Exploration and Development Department of CNOOC(China),Beijing 100010, China;
2. National Key Laboratory for Efficient Development of Offshore Oil and Gas,Beijing 102299, China;
3. CNOOC Research Institute Co.,Ltd.,Beijing 102299, China

Received:2023-08-21 Revised:2024-09-18 Online:2025-02-25 Published:2025-05-13

摘要/Abstract

摘要： 海上疏松砂岩油藏储层疏松,非均质性强,聚合物驱开发过程中发生窜流,造成无效水循环,严重影响开发效果。针对上述问题,考虑聚合物驱驱油机理,构建基于井间连通单元的聚合物驱井间动态计算模型,在此基础上确定窜流通道强度特征参数,形成窜流强度综合评判因子,建立适用于海上稠油油藏聚合物驱的窜流通道分级表征方法。将研究成果应用于海上S油田聚合物驱窜流通道识别,结果表明:文中方法相比Eclipse模型历史拟合速度可提高154倍,拟合误差在10%以内,S1区识别出A02、A19、K29井发育大孔道,A13、A21井发育优势渗流通道,与示踪剂检测结果一致性高,证明新方法可靠,同时在S2区识别出2段大孔道及6段优势通道,为该区剩余油挖潜提供了支撑。研究成果可为油田聚合物驱低效通道针对性治理及持续高效开发提供有效的指导。

关键词: 稠油, 聚合物驱, 窜流通道, 定量识别, 分级表征

Abstract: The reservoir of offshore unconsolidated sandstone reservoir is loose and possesses strong heterogeneity.Breakthrough flow occurs during the development of polymer flooding,resulting in ineffective water circulation and seriously affecting the development effect.In view of the above problems,considering the mechanism of polymer flooding,an interwell dynamic calculation model of polymer flooding based on interwell connectivity unit is constructed.On this basis, the characteristic parameters of breakthrough flow channel intensity are determined,and the comprehensive evaluation factor of breakthrough flow channel intensity is formed.A breakthrough channel hierarchical characterization method suitable for polymer flooding in offshore heavy oil reservoirs is established.The research outcomes are applied to the breakthrough flow channel identification of polymer flooding in offshore S Oilfield.The results indicate that compared with the Eclipse model,the historical fit speed of the proposed method can be increased by 154 times,and the fitting error is within 10%.In S1 Area, large channels are identified in A02,A19 and K29 wells,and preferential flowing channels are identified in A13 and A21 wells.The results are in good accordance with the tracer monitoring results,which proves that the new method is reliable.At the same time, two sections of large channels and six sections of preferential flowing channels are identified in S2 Area,which provides support for tapping the potential of remaining oil in this area.The research findings can provide guidance for targeted management and sustainable high efficienct development of inefficient channels in oilfield driven by polymer flooding.

Key words: heavy oil, polymer flooding, breakthrough flow channel, quantitative identification, hierarchical characterization

中图分类号:

TE357

张鹏, 未志杰, 刘玉洋, 崔永正, 雍唯, 张健, 周文胜. 海上聚合物驱疏松砂岩稠油油藏窜流通道分级表征方法[J]. 特种油气藏, 2025, 32(1): 120-126.

ZHANG Peng, WEI Zhijie, LIU Yuyang, CUI Yongzheng, YONG Wei, ZHANG Jian, ZHOU Wensheng. Study on the hierarchical characterization method of breakthrough flow channels in offshore unconsolidated sandstone heavy oil reservoirs driven by polymer flooding[J]. Special Oil & Gas Reservoirs, 2025, 32(1): 120-126.

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海上聚合物驱疏松砂岩稠油油藏窜流通道分级表征方法

Study on the hierarchical characterization method of breakthrough flow channels in offshore unconsolidated sandstone heavy oil reservoirs driven by polymer flooding

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