基于小信号放大理论的早期试井分析方法应用研究

Study on Application of Well Analysis Method at Early Time Based on Small-Signal Amplification Theory

采用基于小信号放大理论的早期试井分析方法得到的典型曲线进行试井解释,解决了不出径向流直线段井的试井分析问题。为验证方法的正确性,使用标准井例,截取不同时间段的压力恢复数据进行曲线拟合。与常规的压力及其导数拟合方法相比,该方法大大降低了解释结果的多解性。结合实际井例,证明了早期试井拟合方法可解决低渗透油田不出现径向流直线段的压力资料解释问题;也可用于检验导数拟合方法的正确性,达到缩短关井时间的目的。

Using typical curves acquired from well analysis at early time based on small-signal amplification theory for well test interpretation,it is solved about the question of well analysis without radial flow.In order to verify this method,curve-matching of pressure recovery data during different period of key hole is carried out.Comparing with the traditional pressure and derivative match method,this new method greatly reduced the diversity of interpretation results.Through application of this method,it is proved that early stage well fitting method can give answer to the question that hypotonic reservoir does not have linear pressure data of radius flow.This method can also be used to verify the derivative match results to reduces the shut-in time of well.