基于模糊综合评价法的四川盆地下侏罗统陆相页岩气地质选区  

Geological and Regional Selection of Shale-gas in Lower Jurassic of Sichuan Basin Based on Comprehensive Fuzzy Evaluation

作　　者：任垒[1] 窦斌[1] 刘国良[1] 朱珊珊[2] 

机构地区：[1]岩土钻掘与防护教育部工程中心中国地质大学(武汉)工程学院,湖北武汉430074 [2]长江大学地球科学学院,湖北荆州434023

出　　处：《石油天然气学报》2012年第09X期177-180,3,共4页Journal of Oil and Gas Technology

摘　　要：四川盆地是我国重要的油气共生盆地,其下侏罗统自流井组主要为一套深湖-半深水湖相沉积,黑色页岩非常发育,具有分布广、有机碳丰度高等特点,具备页岩气成藏的基本地质条件。由于我国页岩气工业尚处于初期阶段,还未建立完善的页岩气评价体系,在参考北美海相页岩气评价标准的基础上,结合下侏罗统陆相页岩气成藏特点,筛选有机碳含量、成熟度等7项指标作为地质选区评价因素,通过建立模糊综合评判模型对四川盆地下侏罗统陆相页岩气进行综合评价,结果表明阆中-平昌地区下侏罗统页岩气具有较好的勘探潜力。Sichuan Basin was an important oil-gas association basin in China.Ziliujing Formation in Lower Jurassic was mainly composed of a set of deep lake-semi deep lake facies deposits,where black shale was well developed,it had the characteristics of wide distribution and high organic carbon content,it had a basic geological conditions of forming shale gas.Because shale gas industry was still at primary stage in our country,its evaluation system was not yet established.Based on the standards of marine shale gas evaluation system in Northern America,combined with the characteristics of shale gas accumulation in Lower Jurassic,organic carbon content,maturity and 7 other indexes were selected as evaluation factors.The comprehensive evaluation of shale gas in Lower Jurassic is evaluated by establishing comprehensive fuzzy evaluation model,the results reveals that Lower Jurassic in Langzhong-Pingchang area has better potential for shale gas exploration.

关 键 词：四川盆地 页岩气 陆相 模糊综合评判 

分 类 号：P618.13[天文地球—矿床学]