Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (6): 117-124.doi: 10.12108/yxyqc.20180614

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Production split method restricted synthetically by multi-factors in thin interbed sandstone reservoirs

YANG Zhaoping1,2, YUE Shijun1,2, ZHENG Changlong1,2, LIU Xiongzhi1,2, CHEN Gengxin1,2   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development-Northwest, Lanzhou 730020, China;
    2. Key Laboratory of Reservoir Description, CNPC, Lanzhou 730020, China
  • Received:2018-06-28 Revised:2018-09-11 Online:2018-11-16 Published:2018-11-16

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Abstract: For the problem of production split in thin interbed sandstone reservoirs with multi-layer commingled production, the accuracy of calculation results obtained by conventional production split method is poor. In order to solve this problem, the following measures can be adopted: (1)Determining production split calculation nodes by using various dynamic and static data (including interlayer heterogeneity, production data, liquid production profile)and production data such as zonal isolation and reperforate. (2)According to perforation and putting into production, elastic production period, zonal isolation and reperforate, liquid production profile test, to determine calculation methods of different types of nodal points separately, obeying the rule of "linearity interpolation between nodal points, and linearity extrapolation outside last nodal point". (3)The calculation procedure of produc-tion split was established. Using the above measurements, the produced oil and water quantity were split accurately for more than 200 wells in Gasi area in Qaidam Basin. The results of production split coincide well with actual production situation and liquid production profile test data. This method improves the accuracy of production split results and enhances work efficiency.

Key words: thin interbed sandstone reservoirs, formation coefficient, liquid production profile, calculation nodal point, production split

CLC Number: 

  • TE33
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