It was difficult for pulse testing in the low permeability reservoir, selection of calculation point of pulse directly affected the interpreting results of pulse pressure response curves.

低渗透油藏脉冲试井难度大，脉冲计算点的取法直接影响脉冲压力反应曲线的解释结果。

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For hydraulic fracturing, the damage to fracture surface is ever severe, the permeability of damage zone is ever low, and the production response of hydraulic fracturing is ever junior;

常规压裂时，压裂液对裂缝壁面的污染越严重，裂缝壁面污染带的渗透率就越低，水力压裂能获得的增产倍比就越小；

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