四川盆地龙潭组烃源岩全硫含量特征及其对沉积环境的响应  

Total sulfur distribution of source rock of the Upper Permian Longtan Formation and its response to sedimentary environment in Sichuan Basin

作　　者：付小东[1,2] 邱楠生[1] 秦建中[3] 滕格尔[3] 刘文汇[3] 王小芳 

机构地区：[1]中国石油大学地球科学学院,北京102249 [2]中国石油杭州地质研究院,浙江杭州310023 [3]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214151

出　　处：《石油与天然气地质》2014年第3期342-349,共8页Oil & Gas Geology

基　　金：国家重点基础研究发展计划("973"计划)(2012CB214801);石油化工联合基金项目(40839910)

摘　　要：通过对四川盆地龙潭组烃源岩全硫含量系统分析,研究了龙潭组烃源岩硫含量分布特征和控制因素,以及全硫含量对沉积环境的响应和指示意义。龙潭组不同岩性烃源岩全硫含量差异明显,泥页岩全硫含量高,灰岩硫含量则很低。烃源岩全硫含量(TS)与其总有机碳含量(TOC)、黄铁矿含量、干酪根碳同位素之间具有较好的正相关性。龙潭组烃源岩全硫含量和TOC/TS值对其沉积环境具有明显的响应和指示意义。川中、川东南等地区海陆交互相环境下形成的龙潭组烃源岩硫含量极高,TOC/TS值低;川东北地区台内凹陷、深水陆棚等环境下形成的烃源岩硫含量相对较高,TOC/TS值较高;盆地边缘城口、南江、石柱等地区碳酸盐台地、浅水陆棚等环境下形成的低有机质丰度灰岩烃源岩全硫含量低,而TOC/TS值高。Based on the systematic analysis of Total Sulfur content （ TS） of source rock from the Upper Permian Longtan Formation（LTF）in Sichuan Basin,this paper studied the distribution feature of TS,its controlling factors as well as its re-sponses to and significance as a indicator for sedimentary environment .Shale source rock of LTF is rich in sulfur , but limestone is poor in sulfur .TS has positive correlations with TOC,pyrites content and δ13 C value of kerogen respectively . The TS and TOC/TS value of source rock have distinct responses to and significance as indicators for the sedimentary en -vironment .Source rocks of LTF in paralic facies in middle and southern Sichuan Basin has high TS and low TOC/TS value.Source rocks in intra-platform sag or deep-water shelf facies in northeastern Sichuan Basin has relatively higher TS and TOC/TS value.And limestone in carbonate platform or shallow-water carbonate shelf facies in Chengkou ,Nanjiang, Shizhu areas located at the edge of Sichuan Basin has low TS and high TOC/TS value.

关 键 词：全硫含量 沉积环境 烃源岩 龙潭组 四川盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]