四川盆地及邻区上二叠统-下三叠统海槽的深水沉积特征

添加时间:2008-03-25 原文发表:2008-03-25 人气:3 来源：wangfan

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四川盆地及邻区上二叠统-下三叠统海槽的深水沉积特征

王一刚　文应初　洪海涛　夏茂龙　张静　宋蜀筠　刘划一　

摘　要：四川盆地及邻区广元-旺苍、城口-鄂西、开江-梁平海槽是上二叠统-下三叠统飞仙关组(P3-T1f)的深水碳酸盐沉积区.该区上二叠统上部大隆组是硅质岩、硅质泥岩、硅质灰岩组合,含放射虫、有孔虫等化石,厚12.5～29.0 m,为海槽裂陷期凝缩沉积.三叠系飞仙关组下部为远洋沉积的暗色泥岩、微晶碎屑灰岩和重力流沉积的浊积岩、角砾灰岩组成的深水碳酸盐沉积,厚50.0～300.0 m,是裂陷期后的海槽充填沉积.海槽相区沉积在晚二叠统世末达到最大海泛面沉积了大隆组.海平面缓慢下降期沉积了补偿充填性质的飞仙关组深水碳酸盐岩.海槽相区上二叠统-下三叠统飞仙关组构成了一个完整的三级层序.深水沉积物的有机碳平均值高达6.21%,是良好的烃源岩.但在海槽相区上二叠统不发育生物礁,飞仙关组缺乏鲕粒岩.
关键词：深水碳酸盐;硅质岩;大隆组;飞仙关组;天然气储层;开江-梁平海槽;四川盆地
分类号：TE111.3 　文献标识码：A
文章编号：0253-9985(2006)05-0702-13

Petroleum geological characteristics of deep water deposits in Upper Permian-Lower Triassic trough in Sichuan basin and adjacent areas

Wang Yigang　 Wen Yingchu　 Hong Haitao　 Xia Maolong　 Zhan Jing　 Song Shuyun　 Liu Huayi　

基金项目：国家重点基础研究发展规划(973)项目(2001CB209104)
作者简介：王一刚(1954-),女,教授级高级工程师,石油地质与沉积学研究
作者单位：王一刚（中国石油天然气股份有限公司,西南油气田分公司,勘探开发研究院,四川,成都,610051）　
　　　　　文应初（中国石油天然气股份有限公司,西南油气田分公司,勘探开发研究院,四川,成都,610051）　
　　　　　洪海涛（中国石油天然气股份有限公司,西南油气田分公司,勘探开发研究院,四川,成都,610051）　
　　　　　夏茂龙（中国石油天然气股份有限公司,西南油气田分公司,勘探开发研究院,四川,成都,610051）　
　　　　　张静（中国石油天然气股份有限公司,西南油气田分公司,勘探开发研究院,四川,成都,610051）　
　　　　　宋蜀筠（中国石油天然气股份有限公司,西南油气田分公司,勘探开发研究院,四川,成都,610051）　
　　　　　刘划一（中国石油天然气股份有限公司,西南油气田分公司,勘探开发研究院,四川,成都,610051）　

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