Lithologic Reservoirs ›› 2011, Vol. 23 ›› Issue (4): 70-74.doi: 10.3969/j.issn.1673-8926.2011.04.012

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Heterogeneity of Chang 2 reservoir in Dingbian area, Ordos Basin

ZHAO Hesen1, CHEN Yicai1, TANG Bo1, LIN Hangjie1, LIU Yufeng2, ZAHNG Yan2   

  1. 1. College of Energy Resources, Chengdu University of Technology, Chengdu 610059, China; 2. No. 3 Oil Production Plant, Changqing Oilfield Company, PetroChina, Yinchuan 750006, China
  • Online:2011-08-20 Published:2011-08-20

Abstract:

Based on statistics of core and well log data, parameters of variation coefficient, dash coefficient and differential are calculated to carry out the study on the heterogeneity of layer, interlayer and areal heterogeneity of Chang 2 reservoir. The sand sets of Chang 2 reservoir are mainly of distributary channel sand bodiesin delta plain, and the layer heterogeneity is weak. There are many single sand bodies inside the reservoir, mud interbeds and barriers developed, and layer heterogeneity is relatively strong. In the plane, the reservoir heterogeneity in the distributary channel is weak and it is strong in the levee, crevasse splay and swamp. It is considered that Chang 2 reservoir in Dingbian area is of moderate heterogeneity.

Key words: line drawing of seismic-reflection profile, sequence stratigraphic framework, sequence stratigraphic model, Bohu Depression

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