摘要
东辛油田是一个典型的地质构造异常复杂的断块油田,经过40余年的开发,目前已进入特高含水期,受砂岩油藏非均质性等复杂地质特征及开发非均质的影响,进入特高含水阶段后,地下剩余油分布状况复杂,搞清楚断块油藏影响剩余油分布的主控因素及剩余油富集规律,对有效提高断块油藏采收率及开发效果具有重要的指导意义。
根据东辛油区油藏开发特点,从构造、断层、夹层、物性、开发五种剩余油分布主要影响因素出发,以东辛油田典型断块油藏原型为基础,抽象设计并建立了构造、储层、开发等多因素控制的油藏储层模式。通过应用油藏工程方法及油藏数值模拟技术,优化参数设置,对每类影响因素进行了单因素分析,建立了概念模型,并形成图版,进一步指导断块油藏剩余油挖潜工作的不断开展。
本次研究针对东辛复杂断块油藏开展特高含水期剩余油控制因素和富集模式研究,将地质模式和开发模式有机的结合起来,形成针对不同类型断块油藏的剩余油控制因素和富集模式的理论体系与配套开发技术,提出高效的剩余油挖潜措施,找准提高采收率的方向,对指导东辛断块油藏特高含水期剩余油挖潜,减缓产量递减具有重要的理论和实践意义。
Dongxin Oil Field is a typical complex fault block oil field.After decades of development, Dongxin Oil field has now reached high water cut stage.Because of complex geologic characteristic and heterogeneity of development, the underground oil, gas and water distribution is very complicated. Therefore, the study of fualts and their combinations on the mechanism of the formation of the enriched remaining oil and the patterns of enriched remaining oil of different complex fault block reservoirs is very important to improve the developing level of complex fault block reservoirs, stablize production of old oil field.
Being prototype of the actual existence of complex fault block reservoirs in Dongxin oilfield, the complex fault block reservoir was classified and idealized, different types of complex fault block reservoir model were established. And on this basis, different enriched patterns of remaining oil of complex fault block reservoir were studied in using numerical simulation technique.
This paper studied the controlling factors of remaining oil during high water cut stage and the enriched pattern of remaining oil of Dongxin complex fault block reservoir,created theory system and relavant development technology of different fault block reservoirs, proposed highperformance tapping measures and will be able to provide the basis for tapping measures of complex fault block reservoir in Dongxin Oil Field.
引文
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