中国南方海相页岩气有利目标区优选的模糊相似法  

The application of fuzzy similarity method to preferably favorable target area of marine shale gas in South China

作　　者：郭秀英[1,2] 陈义才[3] 任东超 王晓飞[3] 刘东东[3] 孙超亚 

机构地区：[1]西南石油大学经济管理学院,成都610500 [2]四川石油天然气发展研究中心,成都610500 [3]成都理工大学能源学院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2016年第3期326-335,共10页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家科技重大专项(2012ZX05018-006);四川省科技厅软件科学研究项目(2016ZR002P);四川省社会科学重点研究基地四川石油天然气发展研究中心资助项目(川油气科SKA15-01)

摘　　要：有利目标区优选是页岩气勘探开发的前提。根据中国南方海相页岩气成藏特点,筛选了页岩有效厚度、有机碳含量、孔隙度等13项页岩气有利目标区优选评价指标,并且结合国内外页岩气勘探开发经验,建立了评价指标的分级分类评价标准。针对页岩气储层的厚度大、非均质性以及勘探早期对评价指标值的地质认识准确度较低,用区间数距离体现页岩气有利目标区优选的不确定信息评价指标值差异,应用模糊相似理论,建立了页岩气有利目标区优选的分级、分类并能区分优劣的模糊相似方法。实例计算分析结果表明,该方法与综合信息叠合法相比,评价结果可靠程度高,而且能判明被评价页岩气区的有利类型和优劣顺序。The preferred selection of favorable target area is the precondition of shale gas exploration and development. According to the accumulation characteristics of China marine shale gas, this study selects 13 comprehensive evaluation index of preferably favorable target area of shale gas, including effective thickness of shale, organic carbon content and so on. The evaluation index of classified evaluation standard is established in reference to domestic and international experience in shale gas exploration and development. Large thickness of shale gas reservoirs and heterogeneity leads to lower accuracy of geological data for evaluation index values in the early exploration, therefore, interval distance is used to reflect the difference of uncertain information evaluation index values of preferably favorable target area of shale gas and fuzzy similarity theory is used to establish the fuzzy similarity method for the classification and systematization of preferably favorable target area of shale gas and also distinguishes the good and bad shale gas. Practice calculation analysis shows that this method has a high degree of reliability on the results of the evaluation compared with comprehensive information superposition methods, and it also can determine the advantageously type and order of all evaluation shale gas area. This method proves to be a new tool for the preferred selection of favorable target area.

关 键 词：决策分析 模糊相似法 模糊相似系数 海相页岩气 有利目标区 评价指标 

分 类 号：TE132.2[石油与天然气工程—油气勘探]