DST压恢法在大港油田的应用

Application of DST Pressure Build-up Technique in Dagang Oilfield

非自喷井解释方法一直是困扰试井界的难题之一。自1995年底应用DKS2．0软件中DST压恢分析法先后处理了大港油田200多层实测资料以来，发现一部分井与常规分析法的处理结果完全不同。这些井多出现在均质无限大油藏，且其压力及压力导数曲线开口小、导数曲线驼峰较小。通过对DST压恢分析法在大港油田应用情况的分析，认为此方法适用于均质非自喷井，尤其是处理低渗且地层受污染井的结果比较符合地层的实际地质情况，其成果的应用对地层改造有一定的指导作用。

The interpretation method for nonflowing wells is always one of the difficult problems puzzling well testing circles. Since the end of 1995, DST pressure build-up analysis method in DKS2. 0 software has been used to successively process actual data from over 200 zones of Dagang oilfield,it is found that a part of these wells have different analysis results from those used with conventional analysis technique, most of these wells are from infinite homogeneous formations with small difference among pressure and pressure derivative curves,and small humps on derivative curves. The analysis of application of DST pressure build-up analysis technique in Dagang oilfield indicates that the technique is applicable to homogeneous nonflowing wells,especially the analysis results of the wells with low permeability and formation damaged are conformable to actual geologic conditions, and application of such results has certain guide to stimulation job.