Quantitative characterization of vertical heterogeneity of mouth bar based on the analytic hierarchy process and the fuzzy mathematics:A case study of Guan195 fault block of Wangguantun Oilfield

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  • 1.State Key Laboratory of Petroleum Resource and Prospecting,Beijing 102249,China;
    2.College of Geoscience,China University of Petroleum (Beijing),Beijing 102249,China;
    3.Dagang Oilfield Company,CNPC,Cangzhou 061000,China

Received date: 2017-05-02

  Revised date: 2017-10-18

  Online published: 2017-12-10

Abstract

To discuss the influence of base-level cycle on macroscopic reservoir heterogeneity of mouth bar sandbodies,the composite index is used to characterize reservoir heterogeneity.Taking the mouth bar sandbodies in Ek1 formation of Wangguantun Oilfield as an example,the main controlling factors of macroscopic heterogeneity of mouth bar sandbodies were studied.Results show as the falling of the ultra short-term base-level,the composite index decreased from 0.7 to about 0.5,that means the heterogeneity gradually weakens.In the short-term base level decline process,the average value of composite index of the early-stage mouth bar sand body is 0.62,and that of late-stage is 0.51,the heterogeneity is weaker.In the falling process of middle-term base level cycle changes,the composite index of multi stage mouth bar sandbodies overall decreases,that is as the falling of the long-term base level,the heterogeneity of multi stage mouth bar sandbody overall weakens.The heterogeneity of the mouth bar sandbodies in the late period of super short cycle and short cycle are weaker,the sandbodies are also the favorable targets in the process of oil field exploitation.
 

Cite this article

Wang Xi-xin,Hou Jia-gen,Liu Yu-ming,Dou Lu-xing,Sun Jian,Gong Xun . Quantitative characterization of vertical heterogeneity of mouth bar based on the analytic hierarchy process and the fuzzy mathematics:A case study of Guan195 fault block of Wangguantun Oilfield[J]. Natural Gas Geoscience, 2017 , 28(12) : 1914 -1924 . DOI: 10.11764/j.issn.1672-1926.2017.11.002

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