摘要
一般的钻杆测试(DST)是打开地层生产一段短时间后,就进行关井测压力恢复。本文将完全依据DST的生产测试特点,把流动期和压力恢复期视为受不同井筒存储效应影响下的连续的地层不稳定渗流过程:从而引入一个井筒存储比例因子Fd,建立整个渗流过程的数学模型,并利用有限差分法求解;研制出了用于分析整个DST压力历史的新型典型曲线。新型曲线的应用避免了常用方法中的多解性问题,提高了解释精度。最后,本文用实例分析说明了新型曲线的应用方法。
In DST, a long time build-up test is genarally followed by a short flowing period. By introducing the factor Fd, this paper presents a new mathe-matical model for the interpretation of the whole DST pressure history, with a consi- deration of the wellbore storage in the build-up period, which is taken as a continues flowing period of the slug flow. In addition, this paper presents a set of new type curves on the basis of the numerical solution of the model by finite difference method. Their application will eliminate some problems which commonly appear in the currently used methods. Finally, interpretation procedure is described in detail, and illustrated further by the examples.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1991年第2期80-88,共9页
Acta Petrolei Sinica
