河南理工大学学报（自然科学版）2024，Vol.43Issue(6)：57-68,81,13.DOI:10.16186/j.cnki.1673-9787.2022100009
基于模糊变异熵权法的页岩气藏多参数评价
Multiple parameter evaluation of shale gas reservoirs based on a fuzzy entropy weight and coefficient variation method:A case of well F-2 in Wulong Area,Sichuan Basin
摘要
Abstract
Due to the complex geological conditions,insufficient economic costs and mining technology and other factors,it is necessary to evaluate the quality of shale reservoir before exploiting the shale gas.Objec-tives In order to explore the key parameters that affect the shale reservoir quality,Methods taking clay min-erals,brittleness index,TOC,porosity and gas content as evaluation indexes,the entropy weight method and variation coefficient method were used to calculate the combination weight,and the fuzzy theory combined with TOPSIS method and RSR method was used to evaluate the reservoir quality of Wufeng Formation-Long11 subsection(Long 111,Long 112,Long 113,Long 114)of well F-2.Results The results showed the shale mineral components of Wufeng Formation-Long 11 subsection of well F-2 in Wulong Area were mainly quartz and clay minerals,and the vertical heterogeneity of material components and physical properties was significant.The average content of quartz in Wufeng Formation-Long 111 subsection was the highest.Its aver-age content of TOC was more than 4%,and its porosity was greater than 4%.A relatively downward trend of these elements had been shown in the upward direction,and they dropped to the lowest in Long114 subsec-tion.The gas content was relatively high in Wufeng Formation-Long 111 subsection,and also showed a down-ward trend in the upward direction,and in Long 114 subsection the gas content decreased to less than 2%.The Long 111 subsection with relatively deep water body and high static degree formed the best material composition ratio and the highest organic matter content during the sedimentation period.Its bedding was well developed and rich in biogenic silica,and its organic pores were developed to a high degree.Therefore,its reservoir quality was optimal.The sedimentary environment of Long 112 subsection and Long 113 subsection was relatively shallow.The input of terrigenous detritus to these two sections was increased,and the reservoir quality was inferior.In the sedimentary period of Wufeng Formation,the reservoir was developed in a detention basin environment,and the heterogeneity of some intervals was relatively stronger due to the influence of terrigenous input,and the overall quality was relatively lower.The reservoir quality of Long 114 subsection was the worst.Conclusions Therefore,it was recommended to give priority to the exploitation of Long 111 subsection,and the exploitation of Long 112 sub-section,Long 113 subsection and other parts of the Wufeng Formation was the second choice.关键词
页岩气/储层评价/五峰组-龙马溪组/模糊理论/模糊变异熵权法Key words
shale gas/reservoir evaluation/Wufeng-Longmaxi Formation/fuzzy theory/fuzzy entropy weight and coefficient variation method分类
天文与地球科学引用本文复制引用
张家明,赵迪斐,郭英海,张晴,关欣,焦伟伟,汪生秀..基于模糊变异熵权法的页岩气藏多参数评价[J].河南理工大学学报（自然科学版）,2024,43(6):57-68,81,13.基金项目
国家自然科学基金资助项目(41772130) （41772130）
刘宝珺地学青年科学基金资助项目(DMSMX2019002) （DMSMX2019002）
江苏省自然科学基金资助项目(SBK2021045820) （SBK2021045820）
中国矿业大学青年科学基金资助项目(2021QN1061) （2021QN1061）
重庆市自然科学基金资助项目(cstc2021jcyj-msxmX0624) （cstc2021jcyj-msxmX0624）
重庆市教育委员会科学技术研究项目(KJZD-K202103201) （KJZD-K202103201）
中国矿业大学未来杰出人才助力计划项目(2022WLJCRCZL001) （2022WLJCRCZL001）
江苏省研究生科研与实践创新计划项目(KYCX22_2608) （KYCX22_2608）
