压裂井DST流动期或段塞流压力历史分析

PRESSURE ANALYSIS OF DST FLOW PERIOD OR SLUG FLOW FOR WELLS WITH VERTICAL FRACTURES

本文依据DST流动期或段塞流数学模型的解与常规常产量压降试井之解的基本关系式,导出了压裂井的DST流动期或段塞流压力特征。由压力特征作成的DST压裂井诊断曲线和特种曲线不仅可以诊断出实测数据的井底裂缝性质,而且还可以求地层和裂缝性质参数。

<ABSTRACT>: On the basis of the general relationship between the DST dimen-sionless pressure solution and the equivalent constant surface rate dimensionless solution, this paper has developed the pressure behavior of DST flow period or slug flow for wells with vertical fractures. From these behaviors, one can find some reservoir parameters and fracture characteristics with the DST special plots and diagnostic plots for vertical fractured wells.