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二连油田的阿南、哈南地区属开发老区,近几年为完善其注采系统布置了大批的第三套、第四套井网的调整井。1994年后,受连年高压注水的影响,原始的地层压力系统受到了严重破坏,所钻的井储层压力难以掌握和平衡,施工中常出现溢流或井涌,并由此引发了井漏、井塌及卡钻等复杂情况,给钻进工作带来了极大的困难。通过几年的不断实践和摸索,对阿南、哈南调整井区域的地层压力系统有了比较
Anan and Hanan areas of Erlian Oilfield belong to the old development areas. In recent years, a large number of third and fourth well-network adjustment wells have been arranged for improving their injection and production systems. After 1994, under the influence of high-pressure water injection in successive years, the original formation pressure system was severely damaged. The pressure of the well drilled was difficult to grasp and balance. Overflow or kick frequently occurred during construction, The complicated situation of well collapse and stuck pipe has brought great difficulties to drilling work. After several years of constant practice and exploration, we have compared the formation pressure system in the well and Hanan adjustment well areas