Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (4): 133-139.doi: 10.12108/yxyqc.20180416

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New method for obtaining reservoir parameters with a short time of pressure drop after mini-fracturing

ZHANG Jian1, JING Jiyun2, WANG Xingzun2   

  1. 1. China United Coalbed Methane Company Limited, Beijing 100020, China;
    2. Research Institute of Production Optimization, China Oilfield Services Limited, Tianjin 300459, China
  • Received:2018-04-07 Revised:2018-05-28 Online:2018-07-21 Published:2018-07-21

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Abstract: Initial reservoir pressure and effective permeability are important parameters for reservoir evaluation, fracturing design and well proration of tight reservoirs. Traditional well testing methods and DFIT method are not applicable for tight reservoirs because of the long test time. So a new method for obtaining reservoir parameters quickly with a short time of pressure drop after mini-fracturing was prospered:calculating initial reservoir pressure by identifying pseudo-linear flow regime after fracture closure accurately,and achieving the effective reservoir permeability by simulating and fitting post-fracturing pressure drop curve on the foundation of filtration analysis. At last,the calculation result indicates that this method can be used to obtain the reservoir parameters accurately and shorten the test time greatly.

CLC Number: 

  • TE355
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