石油实验地质2018，Vol.40Issue(2)：226-232,7.DOI:10.11781/sysydz201802226
黔南坳陷下石炭统摆佐组暗色页岩热演化与生烃史研究
Thermal evolution and hydrocarbon generation histories of black shale in Lower Carboniferous Baizuo Formation, Southern Guizhou Depression
摘要
Abstract
The thermal evolution and hydrocarbon generation histories of the Lower Carboniferous Baizuo Forma-tion in the Southern Guizhou Depression were studied with petroleum geology, geochemical data and petroleum system simulation in order to evaluate the hydrocarbon generation potential of black shale.Results showed that the black shale of the Baizuo Formation has relatively high organic matter abundance and low hydrocarbon potential. The organic matter in the black shale is mainly of type Ⅱ2,and has reached the high-maturity and over-mature stages. The black shale entered the threshold of hydrocarbon generation during the Middle Carboniferous(about 312 Ma)and the mature stage in the early Triassic(about 238 Ma), and reached the maximum burial depth (about 9 000 m)in the early Jurassic(196 Ma),with a maximum temperature of about 200 ℃. They reached the oil generation peak in the Middle Permian(291-270 Ma)and the gas generation peak in the Late Triassic (262-208 Ma),respectively. The process of oil cracking to gas during the high thermal evolution provided suffi-cient methane gas and storage space for shale gas enrichment. However,tectonic uplift and erosion since 196 Ma had a certain destructive influence on shale gas enrichment.关键词
热演化/生烃能力/页岩气/下石炭统/黔南坳陷Key words
thermal evolution/hydrocarbon generation capacity/shale gas/Lower Carboniferous/Southern Guizhou Depression分类
能源科技引用本文复制引用
宋颖睿,侯宇光,刘宇坤,何生,范志伟,梁雅琪..黔南坳陷下石炭统摆佐组暗色页岩热演化与生烃史研究[J].石油实验地质,2018,40(2):226-232,7.基金项目
国家自然科学基金项目(41772143,41302111)、"十三五"国家科技重大专项(2016ZX05034002-003)和政府间国际科技创新合作重点专项"中美石炭—二叠系页岩储层评价技术合作研究"(2017YFE0106300)资助. （41772143,41302111）
