Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (2): 102-105.doi: 10.3969/j.issn.1673-8926.2012.02.020

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Study on optimal well completion based on fuzzy comprehensive evaluation model

ZHAO Xiaolong， LIU Xiangjun， LIANG Lixi， YANG Chao， CHEN Chunyu， LIU Daojie   

  1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation， Southwest Petroleum University， Chengdu 610500， China
  • Online:2012-04-20 Published:2012-04-20

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Abstract:

The uncertainties, randomness and fuzziness exist in many factors such as output，net present value，completion cost，deliverability, edge and bottom water coning and the degree of the reservoir rock soundness and so on, which all influence the selection ofwell completion. By adopting relative deviation fuzzymatrix, fuzzy analytic hierarchy process and fuzzymatrix synthesis operator, this paper improved fuzzy comprehensive evaluation model. In this model, we generalized the influencing factors, weighed the technology index and economy index, comprehensively evaluated the well completion system, and worked out the optimal membership degree. The improved model evaluation result agreed more with the reality, which proves the feasibility, superiority and reliability of this improved fuzzy comprehensive evaluation model.

Key words: duplex wave migration, pre-stack depth migration, fracture prediction, reeflimestone reservoir

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