卫城低渗、复杂断块油田稳产技术

STABLE PRODUCTION THCHNOLOGY OF LOW PERMEABILITY AND COMPLEX FAULT BLOC RESERVOIES IN WENCHENG

针对卫城油田低渗复杂断块油田存在的层间吸水不均,层间矛盾突出,井况事故严重,注采完善程度低,油井严重供液不足,稳产基础差等问题,通过加强地质基础研究、深化储层、构造认识等一系列的做法,落实了剩余油的地区分布量,介绍了挖潜改造措施,使开发效果得到显著改善,水驱控制程度变好,区块连续三年实现产量上升,采油速度上升,投入产出比为1∶1.67。从技术和经济两方面提出了注水开发老油田的分析指标,为老油田的稳产积累了认识资料。

Aimed at such problems in the low permeability and complex fault block oil reservoirs in WENCHENG oilfield as uneven inter-layers water absorption, apparent inter-layers disturbance, severe downhole accidence, low degree of completion of injection and production, inadequate liquid supply in oil wells and the poor basis of stable production, the area distribution of residual oil is determined by enhancing geological study and improving the recognition of reservoirs and structures, and measurement of enhancing oil recovery is introduced, the effectiveness of recovery gets considerably improved, output has been increased in the area for three years, the recovery rate speeds up, the ratio of cost and return is 1:1.67. The analyzing index of the developed reservoirs is put forward technically and economically, the useful data are accumulated for the stable production in the developed reservoirs.