海上油田加密调整采收率评价方法分析

An analysis of the recovery-ratio evaluation method during infill and adjustment development in offshore oilfields

结合渤海S油田加密调整开发实例,分析了海上油田加密调整采收率评价方法,结果表明:受工程设施处理能力的限制,运用水驱曲线法评价海上油田开发中后期的采收率时需要考虑产液量的影响;而在海上油田加密调整后运用水驱曲线法评价采收率时,应首先确定油田是否处于稳定水驱状态,进而决定是否校正水驱曲线的直线段,以保证预测结果的科学合理。本文成果可以为海上其他油田调整设计及评价提供参考与借鉴。

In combination with the case of infill and adjustment development in S oilfield, Bohai water, the method of recovery-ratio evaluation during infill and adjustment development in offshore oilfields was analyzed. The results have shown that it is necessary to consider the impacts of liquid production when e valuating recovery ratio during the middle-late devel opment in offshore oilfields by using an approach of water-drive curve, due to the treatment ability limi tations of engineering facilities, and that when evalu ating recovery ratio after the infill and adjustment de velopment by using an approach of water drive curve, it should he first determined whether the oil field is in a stable water-drive stale, and then decided whether to correct the linear portion of water-drive curves, so as to assure the scientific and reasonable prediction results. All these may provide a reference to planning and ewduating the adjustment develop ment in other or/shore oilfields.