Geochemical characteristics of Lower Jurassic source rocks in the Zhongkouzi Basin

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Niu, Haiqing^1 ; Han, Xiaofeng^2 ; Wei, Jianshe^2 ; Zhang, Huiyuan^2 ; Wang, Baowen^2

Department of Geology, Northwest University, Xi'an

710069, China^1

Xi'An Center of Geological Survey, CGS, Xi'an

710054, China^2

关键词: Geochemical characteristic;    Hydrocarbon generation;    Kerogen type;    Organic matter abundances;    Research results;    Sedimentary environment;    Source rocks;    Western region;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/3/032050/pdf
DOI  :  10.1088/1755-1315/108/3/032050

来源: IOP

【 摘 要 】

Zhongkouzi basin is formed in Mesozoic and Cenozoic and developed on the Hercynian folded belt, the degree of exploration for oil and gas is relatively low hitherto. In order to find out the geochemical characteristics of the source rocks and the potentials for hydrocarbon generation. The research result shows that by analysis the geochemical characteristics of outcrop samples and new core samples in Longfengshan Group, Longfengshan Group are most developed intervals of favorable source rocks. They are formed in depression period of the basin when the sedimentary environments is salt water lacustrine and the water is keeping stable; The organic matter abundance is middle-higher, the main kerogen type is II1-II2 and few samples act as III type, The organic matter maturity is low maturity to medium maturity. The organic matter maturity of the source rock from eastern part of the basin is higher than in the western region. The source rock of Longfengshan Group are in the hydrocarbon generation threshold. The great mass of source rocks are matured and in the peak stage of oil generation.