考虑泵排量因素求取地层压力

Formation pressure calculation considering theoretic displacement

王道串 关　森 吴福泉 张航州

成都理工大学能源学院，四川 成都 610059 长庆油田分公司采油一厂，陕西 延安 716000

Collage of Energy Resources, Chengdu University of Technology, Chengdu 610059, China No.1 Oil Production Plant of Changqing Oilfield Company, CNPC, Yan忆an 716000, China

地层压力是油田开发过程中的一个极其重要的参数，但测量静压需要关井，作业耗时且延误生产。利用生产资料求取地层压力的传统方法，没有考虑抽油机工作制度的影响。将地层压力和抽油机机械能量看作统一的能量体系，在调整抽油机参数过程中，利用理论排量的变化及产量、动液面、含水率等一系列参数的变化来建立泵排量与油层静压的关系。通过运用此方法，对长庆油田塞160区块20口井进行计算，其计算结果与实际压力测量结果表明，两者平均误差为8.34%，很好地反映了地层情况。

Formation pressure is a very important parameter during an oilfield exploitation. However, it needs to shut in to measure the formation pressure, and wastes a lot of producing time. Traditional way of measuring formation pressure does not consider the influence of theoretic displacement by well pumping unit. In order to make improvement , taking formation pressure and energy of well pumping unit as a unified energy system, using the correspond relationship of theoretic displacement, producing fluid level and water ratio during different theoretic displacement to establish the relationship of theoretic displacement and formation pressure.
Application of this method in 20 wells of Sai 160 Area of Changqing Oilfield shows that its average error is 8.34%,which clearly reflects the truth.