井研—犍为地区筇竹寺组页岩有机地球化学特征  

Organic Geochemical Characteristics of Shale in Qiongzhusi Formation, JingyanQianwei Area

作　　者：谢丹[1,2] 徐天吉[3] 张文凯[1,2] 李曙光[3] 佟恺林[4] 

机构地区：[1]油气藏地质及开发工程国家重点实验室.成都理工大学,四川成都610059 [2]成都理工大学能源学院,四川成都610059 [3]中国石油化工股份有限公司西南分公司勘探开发研究院,四川成都610000 [4]成都理工大学地球物理学院,四川成都610059

出　　处：《天然气技术与经济》2015年第6期1-4,81,共4页Natural Gas Technology and Economy

基　　金：国家自然科学基金(编号:41172119)资助

摘　　要：以井研—犍为地区JY1、JS1两口钻井资料为基础,对区内筇竹寺组页岩展布特征、有机地球化学特征等进行了研究。研究结果表明：本区筇竹寺组优质页岩厚度达到了40 m,远远大于形成工业性页岩气藏的下限,具有形成页岩气藏的首要条件;埋藏深度为3 000~3 500 m,埋深较大,但是在可进行勘探范围内;有机质条件较好,优质页岩有机碳含量大于1%;有机质类型为Ⅰ型（腐泥型）;有机质处于过演化阶段,Ro值均大于2%但小于3%,并且页岩气藏成藏类型为热成因型,适当的Ro使本地区成为热成因气藏的有利分布区。在高演化条件下可以大量生成干气。研究区页岩有机地球化学特征表明,筇竹寺组页岩气具有基本成藏条件,有必要对其进行进一步研究。Based on some drilling data from both JY 1 and JS 1wells in Jingyan- Qianwei area, the distribution and organic geochemical characteristics of shale in Qiongzhusi Formation were summed up. Results show that(1) for the shale with high quality, its thickness reaches 40 m, which is not only much more than the lower limit to form commercial shale-gas reservoirs but also an essential prerequisite to form a shale-gas reservoir;(2) its burial depth ranges from 3 000 m to 3 500 m, which is available for an exploration;(3) it has better organic-matter conditions: organic carbon content > 1%, I-type(or sapropelic) organic matter, 3 % > R0 > 2%,and an overmature stage; and(4) an appropriate R0 is conducive to forming this thermogenic-origin shale-gas reservoir, further to generate large amount of dry gas under a higher evolution stage. In addition, it is demonstrated from these characteristics that the shale gas in Qiongzhusi Formation has some conditions to form a reservoir. So, it's necessary to carry out a further study.

关 键 词：井研—犍为地区 筇竹寺组 页岩厚度 页岩埋深 地化特征 

分 类 号：P618.13[天文地球—矿床学]