试井分析中时间函数处理新方法

New Method Research about Time Function Application in Well Test Analysis.

试井分析中,在不满足生产流动时间远远大于关井压力恢复时间的条件下,开关井测试时间较短,或生产段井底流压资料缺失,均导致对压力恢复数据出现不合理的解释。开关井测试时间较短,可以联立压降段和压恢段引入反褶积方法解释;生产段井底流压资料缺失,可以补充到多个离散流压资料点联立压恢段解释。该方法在渤海油田取得了较好的应用效果,具有一定的推广价值。

In well test analysis,when the condition of tp>>Δt is not satisfied,i.e.the flow period is not much longer than the shut-in period,or when all the flowing pressure data are not acquired,irrational build-up analysis result might be obtained.When the flow and build-up periods are all short,Deconvolution method can be applied;when all the flowing pressure data are not acquired,build-up analysis can be conducted by combining one or more discrete flowing pressure data points.This method has been applied in Bohai oilfield and resulted better analysis.