应用试井方法对大房身气田早期评价研究

Early Time Evaluation of Dafangshen Gasfield Using Well Testing Technique

利用大房身气田压力恢复试井、产能测试资料的解释，获得了气藏的储层特征、边界、井的污染程度等大量信息。利用这些信息结合大房身气田地质研究和试采动态，对大房身气田进行了早期评价。评价结果认为该气田为单孔介质，不存在裂缝；储层连通性差，有效渗透率差异大，非均质性强；气砂体比较小，单位压降产量低；构造低部位存在边水，井底积液将是影响气井产能的主要因素之一。

The interpretation of pressure build-up test data and productivity test data from Dafangshen Gasfield has obtained a great deal of information about gas reservoir property, boundary well damage etc. Combined the information with geologic research and early production test activities in Dafangshen Gas field, early time evaluation has been made. The results of evaluation illustrate that the gasfield is a monopore medium without fracture,reservoir communication is poor,effective permeability differs greatly from point to point, heterogeneity is strong,gas sand is small with low production rate compared to unit pressure drop,edge water exists at low part of the structure,liquid accumulated at bottom hole will be one of the main factors affecting the productivity of gas wells.