摘要
从储层识别和动用的角度出发,将储层物性下限分为储层、含油储层、动用储层和有效储层物性下限等四种类型。基于储层渗流理论,综合考虑驱动压力作用下的不同尺度孔隙渗流响应特征和最小流动孔径的差异,对四种储层物性下限的内涵及确定方法进行了理论探讨与实例分析。研究结果表明:储层物性下限是判别储层和非储层的界限,孔隙度和渗透率低;含油储层物性下限是划分含油储层和非含油储层的界限,孔隙度和渗透率较高;动用储层物性下限是识别动用储层和非动用储层的界限,孔隙度和渗透率较高;有效储层物性下限是确定有效储层和非有效储层的界限,孔隙度和渗透率高。储层、含油储层、动用储层物性下限分别与理论渗流、充注渗流和生产渗流的最小流动孔径相对应,可以采用最小流动孔径法确定;而有效储层物性下限与试油渗流的最小流动孔径相关性小,主要受工业油流标准限定,需要根据岩心物性分析、试油和生产测试资料综合确定。由单一的有效储层物性下限研究,逐步转向储层、含油储层、动用储层和有效储层等物性下限综合研究,是储层物性下限深入研究的一个重要方向。
From the perspective of reservoir identification and production,the lower limits of reservoir physical properties are divided into four types:“reservoir”,“oil-bearing reservoir”,“produced reservoir”,and“effective reservoir”.Based on the reservoir percolation theory,comprehensively considering the percolation response characteristics of different-scale pores and the difference in minimum flow pore diameters under the driving pressure,theoretical discussion and case analy⁃sis were performed on the connotation and determination method of four lower limits of reservoir physical properties.The re⁃search results show that:①the lower limits of physical properties of“reservoirs”,“oil-bearing reservoirs”,“produced res⁃ervoirs”,and“effective reservoirs”are respectively the boundaries between reservoirs and non-reservoirs,between oil bearing and non-oil-bearing reservoirs,between produced and non-produced reservoirs,and between effective and ineffec⁃tive reservoirs.The porosity and permeability increase in the sequence of“reservoirs”,“produced reservoirs”,“oil-bearing reservoirs”,and“effective reservoirs”.②The lower limits of physical properties of“reservoirs”,“oil-bearing reservoirs”,and“produced reservoirs”respectively correspond to the minimum flow pore diameters of theoretical percolation,charging percolation,and production percolation and can be determined by the minimum flow pore diameter method.③The lower limits of physical properties of“effective reservoirs”have a low correlation with the minimum flow pore diameter under the test percolation and are mainly limited by the industrial oil flow standard.They need to be determined with the physical property analysis of cores,tests,and production test data.The simple study on the lower limits of physical properties of“ef⁃fective reservoirs”has gradually shifted to a comprehensive study on the lower limits of physical properties of“reservoirs”,“oil-bearing reservoirs”,“produced re
作者
代金友
林立新
王洋
王祚琛
于占轩
DAI Jinyou;LIN Lixin;WANG Yang;WANG Zuochen;YU Zhanxuan(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing City,102249,China;China University of Petroleum(Beijing),Beijing City,102249,China)
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2022年第3期29-35,共7页
Petroleum Geology and Recovery Efficiency
关键词
储层
物性下限
理论探讨
实例分析
最小流动孔径
reservoir
lower limit of physical properties
theoretical discussion
case analysis
minimum flow pore diameter
