川中—川南过渡带须家河组烃源岩特征  

Features of source rocks in the Xujiahe formation at the transitional zone of central-southern Sichuan basin

作　　者：杨阳[1] 王顺玉[1] 黄羚[1] 钟家国[1] 

机构地区：[1]西南石油大学资源与环境学院

出　　处：《天然气工业》2009年第6期27-30,共4页Natural Gas Industry

摘　　要：川中—川南过渡带上三叠统须家河组可供勘探面积大,以此作为目的层的探井少,研究程度低。从有机碳含量、氯仿沥青"A"含量、干酪根显微组分特征、干酪根碳同位素组成特征、镜质体反射率等方面着手,分析了研究区须家河组烃源岩有机质丰度、有机质类型和有机质成熟度,并对研究区烃源岩进行了初步评价。分析认为该区须家河组烃源岩总体属于中等—较好烃源岩,有机质类型以腐殖型为主,煤及泥岩大多仍处于成熟阶段为主的生烃高峰期。总体上须家河组有一定的生烃物质基础,有望获得较好的勘探效果。The Upper Triassic Xujiahe formation in the transitional zone of central-southern Sichuan basin is large in exploration area but low in exploration maturity and few exploratory wells take this formation as their drilling target. The organic abundance,types and maturity of the source rocks in the study area are analyzed in respects of organic carbon content (TOC),chloroform asphalt 'A',kerogen maceral characteristics,kerogen carbon isotope composition,and vitrinite reflectance (Ro). A preliminary assessment of the source rocks shows that their quality is fair-to-good as a whole and the type-Ⅲ kerogen is predominant. Most of the coals and mudstones are still in peak-hydrocarbon generation stage. As a whole,the Xujiahe formation is quite rich in hydrocarbon-generating materials,thus exploration in this area is expected to be fruitful.

关 键 词：四川盆地 川中-川南过渡带 烃源岩 有机质丰度 类型 热成熟度 

分 类 号：P618.13[天文地球—矿床学] P618.130.2[天文地球—地质学]