【作者】 商建霞；

【导师】 林承焰；

【作者基本信息】 中国石油大学 ， 矿产普查与勘探， 2011， 硕士

【摘要】 冀东油田是复杂小断块油田的典型代表,油田内断层多,断块面积小,加上河流相储层非均质性强,纵向上油层层数多,油水关系复杂。进入特高含水期后,且由于在开发过程中实施单采开采方式,开采的主要矛盾变为层内乃至砂体内部结构之间的矛盾,剩余油分布受断块内的储层单砂体控制。本文以冀东高尚堡油田高29断块区的六个典型的主力层(NmⅡ3、NmⅡ5、NmⅢ5、NgⅠ1、NgⅡ6、NgⅣ2)作为研究对象,在油藏地质特征研究基础上,采用了油藏工程分析方法,利用油田生产数据和各种监测数据,结合静态数据和实验资料,对复杂断块特高含水期油藏开发特征进行了分析,明确提出了层间、层内、平面矛盾突出,剩余油认识不清;水驱储量控制程度低,可采储量损失严重;注采系统极不完善,油田稳产难度大等开发中存在的突出问题。针对复杂断块油藏地质特征及分层开采特点,从剩余油形成与分布的控制因素出发,开展基于单砂体三维地质建模的油藏数值模拟研究,揭示了剩余油在单砂体内部垂向上和平面上的分布状况,指出单砂体内的上部以及内部受夹层控制的剩余油富集部位,并对剩余油潜力区分四类进行了定量评价。在此基础上,针对开发中存在的问题提出了高效挖潜措施,对指导复杂断块特高含水期油藏剩余油挖潜、减缓产量递减、改善复杂断块油藏开发效果具有重要的理论意义和实际应用价值。更多还原

【Abstract】 Ji Dong Oil Field is a typical complex little fault-block oil field, which has many faults, small fault block area, strong heterogeneous reservoir in fluvial facies, multiple oil bearing formations and complicated relationship of oil and water. After been developed for many years, some blocks have come into the intermediary and later stage of extra high water cut, the oil and water relationship becomes extremely complicated and more difficult to develop. The distribution of remaining oil is controlled by the single sand body in fault-block oil reservoir.This paper studied on the six typical main layers of fault block Gao 29 of shallow layer Gao Nan in Ji Dong Oil Field. Based on the study of oil reservoir geological property, the characteristics of the complicated fault-block oil reservoir development at extra high water cut stage are summarized by applying the oil reservoir engineering method on the analysis of field production data, kinds of monitoring data, static data and testing data. Moreover, the outstanding issues are revealed, such as extremely imperfect injection-production system, low control degree of water drive reserves, and highly unequal reserves producing. Considering the geological character of complicated fault-block oil reservoir and beginning with the controlling factors of the remaining oil’s forming and distributing, the numerical reservoir simulation based on the 3D geological modeling of the single sand body was carried out to characterize the distribution of remaining oil in the single sand body vertically and horizontally. It shows that on the top of the single sand body and inside controlled by the interbedding are rich accumulations of remaining oil, which have been classified into four types and quantitatively evaluated. Through the above study, the efficient measures of further extracting remaining oil are put forward according to the problems existing in the development practice, which has important theoretical and practical guidance to the development of remaining oil and slows down the decline of production.更多还原