狭长气顶油环合理开发方式探讨

Research on Rational Recovery Process of Long and Narrow Gas-cap Oil Rim

气顶油环开发成功的关键在于防止气窜、合理利用气顶弹性能量提高油环采收率，而狭长气顶油环要做到这一点非常困难。卫2块就是这样一个典型区块，其南部和北部采用了不同的开发方式，所达到的开发效果也不同，但都未能成功地避免气窜，开发效果不理想。文内通过对其开发实践的总结分析，对此类油气藏的合理开发方式进行了探讨。

Preventing gas breakthrough and enhancing oil rimrecovery through rational utilization of gas -cap elasticenergy are the key to successful development of gas - capoil rim. It is very difficult to do so in long and narrowgas -cap oil rim reservoirs. Wei 2 block is typical of thiskind of reservoirs. Although different recovery processeswere applied in the south and north parts of this block,they both could not successfully avoid gas breakthroughand development effects were not desirable. This paperrescarches on rational recovery processes of this kind ofoil/gas reservoirs through summarizing and analyzing thedevelopment practices in his block.