向传刚,杨桂南,吴丽芳,郑景荣,骆雯
XIANG Chuan'gang,YANG Guinan,WU Lifang,ZHENG Jingrong,LUO Wen

• 1:中国石油大庆油田有限责任公司勘探开发研究院

摘要(Abstract)：

低渗透裂缝型油藏在长期注水过程中容易形成诱导缝，在“动态缝”的作用下平面易多方向见水，水驱前缘及剩余油分布趋于复杂，现有建模数模技术无法表征。针对裂缝型油藏“动态缝”预测及剩余油精准刻画难的问题，以四维应力场模拟为基础，通过“人工裂缝正演模拟+井间应变伴生缝预测”的“动态缝”地质建模、“实体缝+应力敏感”为核心的微米级“动态缝”油藏数值模拟技术，实现开发全过程有效裂缝组系预测及剩余油精准刻画。该技术在大庆外围某油田典型区块的应用结果表明，“动态缝”建模数模技术可使单井含水率拟合率提高5～10百分点，全区综合含水率符合率达到90%以上，实现了开发全过程的动态裂缝系统全程跟踪预测，精细刻画了储层“裂缝干扰型”剩余油的分布。研究成果对低渗透裂缝型油藏中后期的开发调整和措施挖潜具有重要的指导意义。
Low-permeability fractured reservoirs may form induced fractures during long-term water injection. Under the action of “dynamic fractures”, water flows areally in several directions, water flooding front and remaining oil distribution tend to be complex and current modeling and simulation techniques cannot characterize. To address the challenge of “dynamic fractures” prediction and accurate remaining oil characterization, based on four-dimensional stress field simulation,“ dynamic fractures” geological modeling with“forward modeling of hydraulic fractures+interwell strain associated fractures prediction” and reservoir numerical simulation for micrometer-level “dynamic fractures” focused on “solid fractures+stress sensitivity” are implemented to realize whole-process effective fractures system prediction and precise remaining oil characterization.Application in a typical block in a peripheral oilfield in Daqing shows that the “dynamic fractures” modeling and numerical simulation technique improves matching rate of single-well water cut by 5～10 percentage points, achieving comprehensive water cut coincidence rate of over 90% for the whole area. This technique enables tracking and prediction of dynamic fractures system throughout the development process and provides detailed characterization of distribution of“ fracture interfered” remaining oil in reservoirs. The research has significant guiding implications for development adjustments and potential tapping measures in middle to late stage of low-permeability fractured reservoirs.

关键词(KeyWords)： 低渗透裂缝型油藏;动态缝;“四维”应力场;正演模拟;应变伴生缝;剩余油
low-permeability fractured reservoirs;dynamic fracture;“four-dimensional” stress field;forward modeling;strain associated fracture;remaining oil

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划“利用大型油气藏埋存二氧化碳关键技术标准研究与应用”(2023YFF0614100);; 中国石油天然气股份有限公司重大科技专项“特低渗/致密油转变开发方式关键技术研究”(2023ZZ17YJ03)

作者(Author): 向传刚,杨桂南,吴丽芳,郑景荣,骆雯
XIANG Chuan'gang,YANG Guinan,WU Lifang,ZHENG Jingrong,LUO Wen

DOI: 10.19597/J.ISSN.1000-3754.202504048

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