Abstract: The fine reservoir descriptions of several complex fault-block oil fields in Shengli petroliferous area have been practiced.In the middle-late stage of the oil fields development,the production decline successively with high water cut.Using modern reservoir description techniques,a series of studies for fault-block oilfields has been carried out based on the geologic characteristics of complex fault-block oil fields in order to enhance the oil recovery and to scout the potential of residual oil.The studies include the detailed correlation and zonation of reservoir units,classification of natural fault blocks,micro-structures,sedimentary microfacies analysis related to stratigraphic unit and fault block classification,reservoir heterogeneity,closed unit of reservoirs space,fine reservoir type,fluid model,reserve recalculation,reservoir geologic model and their related techniques.The technique route of the detailed reservoir description in complex fault-block oil fields has also been summarized.Such key concepts as natural fault block,closed unit of reservoir space,fine reservoir type have been put forward and their significance has been clarified from theory to practice.

Key words: complex fault-block oil field, fine reservoir description, natural fault block, closed unit of reservoir space, fine reservoir type

摘要： 通过对胜利油区多个复杂断块油田的精细油藏描述实践,紧密围绕复杂断块油田的地质特点,运用现代油藏描述技术,针对复杂断决油田开发中后期进入高含水产量递减这一突出矛盾,为了提高采收率、挖潜剩余油,探索出了一套适宜复杂断块油田精细油藏描述的研究内容.主要包括:储层单元的细分对比、自然断块的划分、微型构造、与地层单元和断块划分紧密结合的沉积微相分析、储层非均质、储层空间封闭单元、精细油藏类型、流体模型、储量复算、油藏地质模型等及其相关技术.在此基础上,总结了复杂断块油田精细油藏描述采用的技术路线,提出了自然断块、储层空间封闭单元、精细油藏类型等关键概念,并从理论到实践阐明了其重要意义.

关键词: 复杂断块油田, 精细油藏描述, 自然断块, 储层空间封闭单元, 精细油藏类型