地质科学2017，Vol.52Issue(1)：156-169,14.DOI:10.12017/dzkx.2017.010
四川盆地及其周缘五峰组—龙马溪组有机质差异富集的主控因素探讨
The main factors of differential organic enrichment of the Ordovician Wufeng Formation and Silurian Lungmachi Formation in the Sichuan Basin and its adjacent areas
摘要
Abstract
In recent years,the exploration and development practices of the Ordovician Wufeng Formation and Silurian Lungmachi Formation in the Sichuan Basin and its adjacent areas have showed that shale gas has the characteristic of differential enrichment.Based on the TOC,XRD and elemental analysis results of the Wufeng-Lungmachi shale in the Sichuan Basin and its adjacent areas,combining with the relevant data published by previous researchers,we preliminarily analyzed the differential enrichment characteristics of organic matters in South,East and Northeast Sichuan areas,and discussed its controlling factors from the aspects of mineral composition (clay mineral content),preservation conditions and paleoproductivity.These conclusions can be reached from the study:1) The differential enrichment of organic matters has the following characteristics:In the depositional stage of the Wufeng Formation,the differential degree of organic matter enrichment is relatively low and the organic matter enrichment degree is slightly higher in East Sichuan than South and Northeast Sichuan;while in the early depositional stage of the Lungmachi Formation,the differential degree of organic matter enrichment is relatively high and the organic matter enrichment degree is significantly higher in Northeast Sichuan than South and East Sichuan.2) Difference of preservation (redox) conditions is the main factor resulting in the differential enrichment of organic matters in different areas of the Wufeng Formation and Lungmachi Formation in the Sichuan Basin and its periphery.关键词
有机质/差异富集/五峰组/龙马溪组/四川盆地Key words
Organic matters/Differential enrichment/Wufeng Formation,Lungmachi Formation/Sichuan Basin分类
能源科技引用本文复制引用
邱振,谈昕,周杰,卢斌,张晨晨,施振生,董大忠,王红岩,吝文,江增光..四川盆地及其周缘五峰组—龙马溪组有机质差异富集的主控因素探讨[J].地质科学,2017,52(1):156-169,14.基金项目
国家自然科学基金项目(编号:41602119)、中石油廊坊分院项目(编号:XN41601,XN41603)、中石油勘探与生产分公司项目(编号:XN11301和XN11304)和国家重点基础研究发展计划“973”项目(编号:2013CB228001)资助. （编号:41602119）
