高含水期曲流河型砂体剩余油分布研究

发布时间：2019-06-08 08:27

【摘要】：目前很多油田已经进入开发后期,大部分油井动态表现形式为高含水,中高渗砂岩油藏大部分已经进入“双高期”,地下油水关系复杂,开发矛盾从层间转向层内。在如此高含水的情况下,还会不会有剩余油存在,怎样进行挖潜是目前大家关心的课题之一。目前,针对高含水期不同沉积砂体剩余油分布模式的研究仍存在不足,很大程度上制约了中高渗水驱油藏二次开发研究步伐。因此,有必要对高含水期不同沉积砂体的剩余油分布规律进行研究,为油藏开发提供有力的依据。本文以热河台区块为研究对象,进行曲流河型砂体剩余油分布模式研究。课题研究的开展主要针对辽河油田的实际情况,曲流河的复合河道、单河道和点坝砂体三种微相出发,研究此沉积微相情况下,剩余油形成机理和分布模式。在对沉积微相理论研究的基础上,通过得出曲流河平面相变、垂向相变、废弃河道遮挡和点坝砂体的剩余油分布规律及对剩余油分布影响,进行来指导实际生产,因此此课题的研究具有很高的实用价值及指导意义。最后建立热河台区块曲流河地质模型,并进行数值模拟,进而研究相变、井网不完善和生产动态对剩余油分布的影响。
[Abstract]:At present, many oilfields have entered the later stage of development, most of the oil wells are characterized by high water cut, most of the medium and high permeability sandstone reservoirs have entered the "double high stage", the relationship between underground oil and water is complex, and the development contradiction changes from interlayer to layer. Under the condition of such high water cut, whether there will be any remaining oil, how to tap the potential is one of the topics that everyone is concerned about at present. At present, the research on the remaining oil distribution model of different sedimentary sand bodies in high water cut stage is still insufficient, which restricts the research pace of secondary development of medium and high permeability water drive reservoirs to a great extent. Therefore, it is necessary to study the distribution of remaining oil in different sedimentary sand bodies in high water cut stage, so as to provide a powerful basis for reservoir development. In this paper, the residual oil distribution model of meandering river sand body is studied by taking Rehetai block as the research object. The research mainly aims at the actual situation of Liaohe Oilfield, the compound channel of meandering river, the single channel and the sand body of point bar, and studies the formation mechanism and distribution mode of remaining oil in the case of sedimentary microphase. On the basis of the theoretical study of sedimentary microfacies, the actual production is guided by obtaining the plane phase transition of meandering river, vertical phase transition, residual oil distribution of abandoned river occlusion and point dam sand body and its influence on the distribution of residual oil. Therefore, the research of this subject has high practical value and guiding significance. Finally, the geological model of meandering river in Rehetai block is established, and the numerical simulation is carried out, and then the effects of phase transition, imperfect well pattern and production performance on the distribution of remaining oil are studied.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE327

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