油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (1): 71-75.

• 非常规油气 • 上一篇    下一篇

模糊相似法对页岩气选区评价的应用——以四川盆地海相页岩气为例

王思航1,田小林2,王楚柯3,冯永光2,吴得强2,白家全2,李辉1,孔德才2   

  1. 1. 四川中江经济开发区管委会,四川 德阳 618100
    2. 四川省地质矿产勘查开发局一O六地质队,四川 成都 611130
    3. 贵州大学大数据与信息工程学院,贵州 贵阳 550025
  • 收稿日期:2016-11-15 发布日期:2018-12-05 出版日期:2018-02-26
  • 作者简介:王思航(1990—),男,助理工程师,矿产普查与勘探。

Application of fuzzy similarity methods for evaluating the district of shale gas: A case of marine shale gas in Sichuan Basin

Wang Sihang1,Tian Xiaolin2,Wang Chuke3,Feng Yongguang2,Wu Deqiang2,Bai Jiaquan2,Li Hui1,Kong Decai2   

  1. 1. Management Committee of Zhongjiang Economic Development Zone, Sichuan, Deyang, Sichuan 618100, China
    2. 106 Geological Team of Sichuan Geology and Mineral Resources Exploration Bureau, Chengdu, Sichuan 611130, China
    3. Large Data and Information Engineering College of Guizhou University, Guiyang, Guizhou 550025, China
  • Received:2016-11-15 Online:2018-12-05 Published:2018-02-26

摘要:

针对已有的页岩气有利目标区优选评价指标不全面、评价方法未充分利用不确定信息评价指标值等问题,分析了页岩气富集成藏的生烃、储集、保存和实施勘探开发的地面条件。在此基础上,结合国外页岩气勘探开发成功经验和我国海相页岩气成藏特点,筛选了页岩有效厚度、有机碳含量等13项页岩气有利目标区优选的全面评价指标,并建立了相应的分级分类评价标准。针对页岩气的储层厚度大、非均质性以及勘探早期对评价参数的地质认识程度较低,以评价指标分布的区间值代替不确定信息评价指标的平均值,应用模糊相似理论建立了页岩气有利目标区模糊相似评价方法。实例计算结果表明,与综合信息叠合法相比,该方法合理有效,简单实用,能够为页岩气有利目标区优选提供可靠依据。

关键词: 模糊相似法, 模糊相似系数, 海相页岩气, 页岩气目标区

Abstract:

At present, the optimizing evaluation indexes of the existing favorable target areas of shale gas, is not comprehensive, and the evaluation methods are not taking full advantage of the uncertain information indexes. Therefore, the enrichment, accumulate, and storage of the shale gas, and the surface condition of the exploration and development are analyzed. On this base, by combining the successful exploring experience of the shale gas aboard with the characteristics of the domestic marine shale gas accumulation, we selected 13 comprehensive evaluation indexes, including the netshale thickness and the organic carbon content of the shale gas favorable target areas, and proposed the corresponding classified evaluation standards. Because of the thick shale gas reservoir, the heterogeneity and the lack of the geological awareness of the evaluation parameters, the interval value of the evaluation indexes replaced the average value of the uncertain information evaluation index, and the fuzzy similarity evaluation method based on the fuzzy similar theory was established. The calculation results show that, compared with the comprehensive information superposition method, this method is more reasonable, effective, simple and useful. It can provide reliable evidences for the optimal of the favorable target areas of shale gas.

Key words: fuzzy similarity method, fuzzy similarity coefficient, marine shale gas, target area of shale gas

中图分类号: 

  • P618