大庆油田转变开采方式的分析

本文从大庆油田高含水期开采特点提出了当前大庆油田转变开采方式的必要性,结合油田转抽后井底流压降到饱和压力以下的特点,从理论及实践上探讨了井底压力低于饱和压力后采油指数变化规律,提出了转抽后采油指数变化的经验预测方法。同时通过大量转抽井资料论述了转抽后由于减少了层间矛盾,对转抽后的压力界限提出了分析方法,并进行了初步探讨,本文还对整体转抽的效果进行了分析。

ON THE CHANGE OF PRODUCTION METHOD FROMFLOWING TO PUMPING IN THE DAQING OIL FIELD

The necessity of a change of production method in the Daqing oil field is stressed at the present stage when oil is produced with high water cut. In view of the drop of hottcmhole flowing pressure to under the saturation pressure since the flowing wells in the field go on pumping, and after discussing the changing trend of productivity index when the flowing pressure falls under the saturation pressure, an emphirical method of prediction of the index is proposed. Supported with abundant data about the change of production method from flowing to pumping, the authors claim that the change can minimize inter-pay interferences, increase the thickness of oil drainage and curb the drop of productivity index. A method of analyzing the pressure limits of wells after put on pumping is proposed, and the result of change of production method in the entire field is examined.