滨南油田毕家沙三下亚段开发效果评价

Evaluation of development efficiency of Bijia reservoir in Binnan Oilfield

为了对研究区实施开发方案调整和剩余油挖潜提供指导,运用油藏工程方法,从能量保持状况、水驱效果、产量递减、开发井网的合理性、最终采收率的确定等几个方面对目前该区的开发效果进行评价。滨南油田毕家沙三下油藏地质条件复杂,断层发育,储层非均质性强,属于典型的复杂断块油藏。由于油藏纵向和平面非均质性强的特点,目前开发已进入中高含水阶段,层间矛盾更加突出,水淹严重,产量递减速度加快,开发效果明显变差。

In order to provide guidance for the next development and remaining oil recovery, using the method of reservoir engineering, development efficiency of studied area has been evaluated in this paper from following aspects of energy changes, water flooding effect, production decline, rationality of well network, final recovery efficiency etc. The reservoirs in the lower member of Es3 in Bijia, Binnan Oilfield, are typical complex-faulted ones with complicated geological conditions, developed faults and strong heterogeneity. And the development of those reservoirs has already entered into a medium-high water cut stage for strong heterogeneity in Both vertical and planar directions, which results in stronger interlayer heterogeneity, severe water flooding and also accelerates the decline of production, and finally, development efficiency becomes poor obviously.