数值模拟研究在钟市油田潜三段的应用

Research on Numerical Simulation in Qian-3 Member in Zhongshi Oilfield

钟市油田由于受到纵向含油层系多、储层非均质性强,油水井绝大部分为多层合采合注等因素的影响,对主力砂体剩余油分布情况认识不清。根据"钟市剩余油分布研究"资料,通过对潜三段重点砂体测井资料进行二次处理,对储层物性参数进行趋势模拟,建立储层三维模型。在对各种生产数据进行历史拟合的过程中,分析出钟市油田潜三段剩余油的主控因素,包括储层非均质性、断层遮挡、注采井网不完善和井网未控制等,并在此基础上对剩余油分布进行定量描述。分析认为,井网未控制形成的潜力区剩余储量最大,剩余油储量大的区域表现为强水淹和未水淹,剩余储量主要集中在丰度≤50×10~4t/km^2和50×10~4t/km^2<丰度≤100×10~4t/km^2的两个区间。

A clear picture is not obtained about remaining oil distribution of the main sand body in Zhongshi Oilfield featuring multiple longitudinal oil--bearing series, great reservoir heterogeneity and multilayer commingled water in- jection and production in most oil--water wells. According to the research on remaining oil distribution in Zhongshi Oilfield and through re--treatment of key sand body logging data in Qian-3 Member, this paper carries out trend modeling of reservoir physical property and establishes three--dimensional reservoir model. In the process of history matching of production data, this paper finds out the main factors controlling the remaining oil there, that is, reser- voir heterogeneity, fault barrier, imperfect injection--production pattern and uncontrolled well pattern and accord- ingly describes quantitatively the remaining oil distribution.