标题:Hydrocarbon entrapment and accumulation for Ordovician reservoirs from Xinken block of Halahatang depression as constrained from oil geochemistry
作者:Chang, Xiang-Chun ;Wang, Tie-Guan ;Li, Qi-Ming ;Ou, Guang-Xi ;Tao, Xiao-Wan
作者机构:[Chang, Xiang-Chun ;Wang, Tie-Guan ;Ou, Guang-Xi ] State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 更多
通讯作者:Chang, XC
来源:Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science)
出版年:2013
卷:37
期:3
页码:44-49
DOI:10.3969/j.issn.1673-5005.2013.03.007
摘要:27-C28-C29sterane distribution and light stable carbon isotope (<-30‰), correlating well with the O3source rock. The coexisting intact n-alkane series, evident UCM and fully developed 25-norhopanes in the same oil infer the mixture of a severely palaeo biodegraded oil and later fresh oil. Viscous oil, light oil and dry gas were entrapped in two generation of calcite cements with trimodal distribution of homogenization temperatures for aqueous inclusion correspondingly. The Ordovician reservoir has undergone three charges, which occurred in 402-412, 9-11 and 6-8 Ma respectively. The third entrapment is mainly dry gas possibly originated from Cambrian source rock and constrains the targets near faults communicating the deep source beds.
">Based on the oil geochemistry, petrography and microthermometry of fluid inclusions and basin modeling, the hydrocarbon entrapment and accumulation for Ordovician reservoirs from Xinken block of Halahatang depression was discussed. The results indicate that Ordovician oils are characterized by low C21/C23tricyclic terpanes (<1), "V" shape of C27-C28-C29sterane distribution and light stable carbon isotope (<-30‰), correlating well with the O3source rock. The coexisting intact n-alkane series, evident UCM and fully developed 25-norhopanes in the same oil infer the mixture of a severely palaeo biodegraded oil and later fresh oil. Viscous oil, light oil and dry gas were entrapped in two generation of calcite cements with trimodal distribution of homogenization temperatures for aqueous inclusion correspondingly. The Ordovician reservoir has undergone three charges, which occurred in 402-412, 9-11 and 6-8 Ma respectively. The third entrapment is mainly dry gas possibly originated from Cambrian source rock and constrains the targets near faults communicating the deep source beds.
收录类别:EI
资源类型:期刊论文
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