Geochemical characteristics of source rocks of the Upper Palaeozoic Shanxi Formation source rocks in Shenfu Area,Ordos Basin
Based on the analysis of the geochemical data of mudstone and coal samples of Shanxi Formation in Shenfu Block,Ordos Basin,the types,characteristics and maturity of organic matter of source rocks in the target layer are discussed,and the geochemical characteristics of source rocks in the target layer are compared with those in the adjacent area.The results show that mudstone of the Shanxi Formation in Shenfu Block can be evaluated as a medium-poor source rock.The TOC content of carbonaceous mudstone and coal source rock is higher than that of argillaceous source rock,which can be evaluated as a good-very good source rock and the main source rock of hydrocarbon generation.The organic matter type of mudstone source rocks is mainly type Ⅲ,and that of coal and carbo-naceous mudstone source rocks is mainly type Ⅱ,indicating that the original sediments are mainly higher plants,so hydrocarbon gen-eration is mainly gas,supplemented by oil generation.Most of the source rocks in Shanxi Formation have reached the mature stage,and only a few are at the low mature stage,and the maturity of organic matter gradually increases from west to south.
Shanxi Formationsource rocktype of organic mattermaturity of organic matterShenfu BlockOrdos Basin
万方数据
维普
