反褶积方法在河南油田低渗透油藏试井解释中的应用

由于井筒存储的影响,河南油田低渗透储层出现了大量无径向流压力恢复资料,通过应用反褶积方法消除井筒存储的影响,"恢复"出被井筒干扰掩盖的地层流动特征,从而为试井解释模型识别和地层参数计算提供更好的信息支持,有效降低多解性。应用该方法可以得到储层的压力变化、表皮系数及渗透率等参数,进行低渗透的试井评价。

Application of deconvolution method in well testing interpretation of low permeable reservoirs in Henan oilfield

In ultra-low permeable reservoir of Henan oilfield, large amount of pressure recovery is under the condition of no radial flow, which is affected by wellbore storage. With the application of deconvolution, the wellbore storage effect can be eliminated and the formation fluid characteristics covered by wellbore can be recovered. Therefore, the application can provide better information support for interpretation model identification and formation parameter calculation, and effectively reduce the multiplicity. With the method, the parameters such as pressure variation, permeability can be obtained, which can be used for well testing evaluation.