PPD曲线以及段塞流解释在测试资料解释中的应用

The Application of PPD Curve and Slug Flow Analysis in Well Test Interpretation.

采用压力对时间的一阶导数方法,即PPD方法,可以帮助划分流动段、诊断压力曲线质量。测试中经常会遇到段塞流情况,其曲线不同于常规曲线规律。如果使用常规方法,难以得到较好的拟合解释结果,需要做特殊处理。结合测试解释中遇到的实际问题和常用试井解释软件,推导和讨论了PPD在辅助测试解释中的应用、段塞流在不同测试解释软件的解释方法的异同,以及解释过程中需要注意的事项等。

PPD(Primary Pressure Derivative) is a simple but practical method;it can help interpreter divide flow regimes and diagnose the quality of the tested data.And,slug flow,which occurs quite often in well testing,needs to be analyzed with special handling method,because the curves of which are quite different from those of conventional ones,and so it is hard to get good result if conventional methods are used in its analysis.From our interpretation experiences,and combining Saphir well test software,we introduce and analyze the application of PPD method in well test interpretation,the similarities and differences of slug flow analysis with different softwares,and special attentions need to be paid in interpretation process.