水平井挖潜二类油层典型沉积单元剩余油潜力区的计算方法研究

The Computing Methods Research about Remaining Oil Potential Areas of Sub-layer Typical Sedimentary Unit Development by Horizontal Well

剩余油潜力区的分布一直是油田开发过程中的焦点问题,就目前大庆油田开发的现状来看,剩余油潜力区除了主要分布在主力油层以外,也存在于一些非主力油层内,二类油层就是其中具有代表性的油层.与主力油层相比,二类油层不论在纵向上还是在平面上非均质性都比较严重,给剩余油的挖潜带来了较大难度,而采用水平井挖潜二类油层剩余油也是目前一些油田采用的开采方法,因此对于二类油层剩余油潜力区计算方法的研究就成为了首先要解决的问题.选用了北一区断东试验区二类油层中典型沉积单元进行了剩余油分布状况的剖析和潜力区界限的建立,进行了水平井挖潜二类油层典型沉积单元潜力区计算方法的研究,对油田二类油层实际开发方案的制定具有一定的指导意义.

The distribution of remaining oil potential areas has been a focus problem in the process of oilfield development. According to development situation of the Daqing oilfield, the remaining oil potential areas distribute not only in the major reservoirs, also in the non major reservoirs. The sub-layer is one of the representative reservoirs. Compared with the major reservoirs, heterogeneity of the sub-layer is serious no matter in vertical or in the plane, which make remaining oil development become more difficult. At present, the exploitation method of the sub-layer is by horizontal well in some oil fields. So the calculation method research of the sub-layer remaining oil potential areas becomes the first important problem. In this paper, the sub-layer typical sedimentary unit in the East of the Fault Block in Beiyi District is the main study object. The article analyzes its residual oil distribution status and sets up its boundaries of remaining oil potential areas. And it studies the computing methods about remaining oil potential areas of sub-layer typical sedimentary unit development by horizontal well. That plays an important role in establishing reasonable development plan of the sub-layer.