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

doi:10.11743/ogg20140307

摘要/Abstract

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。

关键词: 全硫含量, 沉积环境, 烃源岩, 龙潭组, 四川盆地

Abstract:

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 responses 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 δ¹³C value of kerogen respectively.The TS and TOC/TS value of source rock have distinct responses to and significance as indicators for the sedimentary environment. 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.

Key words: total sulfur, sedimentary environment, source rock, Longtan Formation, Sichuan Basin

中图分类号:

TE122.1

付小东,邱楠生,秦建中,等. 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[J]. 石油与天然气地质, 2014, 35(3): 342-349. doi: 10.11743/ogg20140307 Fu Xiaodong,Qiu Nansheng,Qin Jianzhong,et al. Total sulfur distribution of source rock of the Upper Permian Longtan Formation and its response to sedimentary environment in Sichuan Basin[J]. Oil & Gas Geology, 2014, 35(3): 342-349. doi: 10.11743/ogg20140307

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