Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (2): 111-116.doi: 10.3969/j.issn.1673-8926.2012.02.022

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Reservoir heterogeneity and its relation with remaining oil distribution in the Matouzhuang Oilfield

LIU Wenchao   

  1. No.6 Oil Production Plant， PetroChina Daqing Oilfield Company Ltd.， Daqing 163114， China
  • Online:2012-04-20 Published:2012-04-20

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Abstract:

Taking Zhuang-2 fault block of the Matouzhuang Oilfield as an example, this paper computed heterogeneous synthetic index by means of entropy weight algorithm to characterize the reservoir heterogeneity, applied the synthetic index to establish heterogeneous model, analyzed the internal, interlayer, plane and space heterogeneity, and discussed the relationship between the heterogeneity and remaining oil. The result shows that there are great differences of heterogeneity among the sublayers. The heterogeneity is weak in shore-shallowlacustrine mixing beach, strong in subaqueous interdistributary bay, middle to weak in subaqueous distributary channel and mouth bar, and strong in front sand sheet. The interlayer heterogeneity is middle to strong. The heterogeneity in plane presents middle degree. Reservoir heterogeneity is affected by sedimentary microfacies, diagenesis and long-term waterflood. Remaining oil mainly distributed in the area where herterogeneity is weak.

Key words: seismic sedimentology, complex lithologies, log parameter inversion, Qibei Sag

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