基于改进模糊综合评判法的断层封堵性综合评价

张翥; 严恒; 汪新光; 高凌; 李金池

doi:10.3799/dqkx.2022.223

Volume 49 Issue 3

Mar. 2024

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Article Navigation > Earth Science > 2024 > 49(3): 1144-1153

Zhang Zhu, Yan Heng, Wang Xinguang, Gao Ling, Li Jinchi, 2024. Comprehensive Evaluation of Fault Sealing Based on Improved Fuzzy Comprehensive Evaluation Method. Earth Science, 49(3): 1144-1153. doi: 10.3799/dqkx.2022.223

Citation:

Zhang Zhu, Yan Heng, Wang Xinguang, Gao Ling, Li Jinchi, 2024. Comprehensive Evaluation of Fault Sealing Based on Improved Fuzzy Comprehensive Evaluation Method. Earth Science, 49(3): 1144-1153. doi: 10.3799/dqkx.2022.223

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Comprehensive Evaluation of Fault Sealing Based on Improved Fuzzy Comprehensive Evaluation Method

doi: 10.3799/dqkx.2022.223

1.
Hainan Branch of CNOOC China Ltd., Haikou 570312, China
2.
Zhanjiang Branch of CNOOC China Ltd., Zhanjiang 524057, China

Received Date: 2022-01-12
Available Online: 2024-04-12
Publish Date: 2024-03-25

Abstract

Abstract

The evaluation of Fault sealing is divided into the evaluation of vertical sealing and the evaluation of lateral sealing. Previous studies mostly adopted the comprehensive fuzzy evaluation method to comprehensively evaluate the fault sealing performance. However, the evaluation results of the fuzzy comprehensive evaluation method are affected by the evaluation score and weight coefficient, which leads to the following two problems. Firstly, the evaluation score of each parameter of the traditional comprehensive evaluation method is obtained through the principle of maximum membership degree, ignoring the internal differences of the same kind of evaluation standards, resulting in low accuracy; secondly, the weight coefficient adopts empirical assignment or equivalent weight assignment, which is different from the actual regional geological environment. This study comprehensively considers the qualitative parameters such as fault mechanics background, lithology opposition relationship and fault reservoir configuration relationship, combined with the influence of quantitative parameters such as fault rock shale content, section normal pressure, fault reservoir displacement pressure and fault stress characteristics, so as to realize the quantitative score representation of the evaluation standard of quantitative parameters. Based on the statistical analysis of regional parameters, the weight coefficients of various parameters are determined and improved by analytic hierarchy process. The weight coefficient is more in line with the regional law. Block A of No.2 fault zone in Weixinan sag is selected as the target area for evaluation, and good results are obtained. Compared with previous research methods, the accuracy is significantly improved.
- verticallateral fault plugging,
- comprehensive quantitative evaluation,
- analytic hierarchy process,
- No.2 fracture zone,
- reservoir evaluation,
- petroleum geology

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References(47)

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Comprehensive Evaluation of Fault Sealing Based on Improved Fuzzy Comprehensive Evaluation Method

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