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低渗透砂岩油藏水驱微观剩余油评价方法与发展方向

Evaluation Methods and Development Direction of Microscopic Residual Oil by Water Flooding in Low Permeability Sandstone Reservoirs
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摘要 低渗透砂岩油藏具有巨大的开发潜力,一直是国内外老油田注水开发的焦点。但在长期水驱的背景下,低渗透砂岩油藏含水率越来越高、开采难度越来越大。为了充分开发低渗透砂岩油藏,提高原油采收率,明确储层微观孔隙结构是研究的基础。基于文献调研,梳理了低渗透油藏储层微观孔隙结构的多种评价方法,归纳了水驱油渗流机理与剩余油描述的研究方法,总结了表面活性剂的驱油机理以及对剩余油的影响。研究发现,现有的微观孔隙结构评价方法基本为定性评价,缺少定量评价;现有的微观渗流机理与剩余油描述方法存在可优化的空间;表面活性剂还需要提高其在高温高盐条件下的表现。最后,阐述了低渗透砂岩油藏水驱微观剩余油未来的评价方法与发展方向,为低渗透砂岩油藏研究提供方向性意见。 As the focus of water injection development in old oil fields at home and abroad,low permeability sandstone reservoirs have enormous development potential.In the context of long-term water flooding,the water content of low permeability sandstone reservoirs is increasing and the difficulty of exploitation is also increasing.To fully develop low-permeability sandstone reservoirs and increase the oil recovery,the microscopic pore structure of the reservoir is the basis of study.Therefore,this paper,based on literature review,summarized the evaluation methods for the microscopic pore structure in low-permeability reservoirs,the research methods of seepage mechanism and residual oil description during water flooding,and the influence of water flooding surfactants on residual oil and the displacement mechanism.It finds that the existing microscopic pore structure evaluation methods are basically qualitative lack quantitative evaluations,the existing microscopic seepage mechanism and residual oil description methods have room to further optimize,and surfactants need better performances on the conditions of high temperature and high salinity.The paper finally elaborates the future evaluation methods and development directions of micro residual oil by water flooding to provide directional suggestions for the research of low-permeability sandstone reservoirs.
作者 于洪敏 王友启 黄凯 祝仰文 王彪 温馨 王鹏 吕朝辉 代全齐 YU Hongmin;WANG Youqi;HUANG Kai;ZHU Yangwen;WANG Biao;WEN Xin;WANG Peng;LV Chaohui;DAI Quanqi(Petroleum Exploration&Production Research Institute,SINOPEC,Beijing 102206,China;School of Petroleum Engineering,Xi’an Shiyou University,Xi’an 710065,China;Jiangsu Oilfield Petroleum Engineering and Technology Research Institute,SINOPEC,Yangzhou 225009,China)
出处 《油气与新能源》 2024年第5期17-27,共11页 Petroleum and new energy
基金 国家重点研发计划“区域二氧化碳捕集与封存关键技术研发与示范”(2022YFE0206800) 中国博士后科学基金项目“CO_(2)地质封存中泥岩盖层孔隙结构动态演化过程与机理研究”(2022M723499)。
关键词 低渗透砂岩油藏 微观评价 水驱 表面活性剂 评价方法 发展方向 Low permeability sandstone reservoirs Micro-evaluation Water flooding Surfactants Evaluation methods Development direction
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