鄂西地区陡山沱组页岩段有机质富集的差异性[J]

鄂西地区陡山沱组页岩段有机质富集的差异性雍自权1张旋1邓海波2刘树根1冉波1孙玮1杨迪1罗超1王世玉1叶玥豪1(1.油气藏地质及开发工程国家重点实验室(成都理工大学),成都 610059;2.中国石油

鄂西地区陡山沱组页岩段有机质富集的差异性 1121111111 雍自权张旋邓海波刘树根冉波孙玮杨迪罗超王世玉叶玥豪 (1.(), 610059; 油气藏地质及开发工程国家重点实验室成都理工大学成都 2. 610000) 中国石油西南油气田分公司开发部，成都 ［摘要］ 探讨鄂西地区下震旦统陡山沱组黑色页岩段有机质富集的差异性。通过鄂西地区 陡山沱组野外露头、地质、地球化学综合研究分析，结果表明鄂西地区陡山沱组沉积环境主 要为潮坪、台内盆地、台缘浅滩和斜坡。黑色页岩段主要发育于台内盆地，而潮坪主要发育 BDTOC2% 白云岩；鄂西地区陡山沱组黑色页岩发育于段和段，其的质量分数大多数＞， DTOCB3% 段的质量分数高于段，两者相差，这种差异与页岩形成的沉积环境密切相关。 - 环境的差异性表现为水体动力条件、古盐度环境和氧化还原环境的地球化学指标差异。 ［关键词］ TOC 陡山沱组；黑色页岩；沉积环境；；地球化学；鄂西 Differences about organic matter enrichment in the shale section of Ediacaran Doushantuo Formation in West Hubei of China 112111 YONG Zi-quan, ZHANG Xuan, DENG Hai-bo, LIU Shu-gen, RAN Bo,SUN Wei, 1111 YANG Di, LUO Chao, WANG Shi-yu, YE Yue-hao 1.State Key Laboratory of Oil &Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China; 2.Southwest Oil &Gasfield Company of PetroChina, Chengdu 610000, China Abstract: This paper discusses the differences about the organic matter enrichment in the shale section of the Ediacaran Doushantuo Formation in West Hubei and analyses the outcrops, geology and geochemistry. The results show that the main sedimentary environment includes tidal flats, shelf lagoon, shelf margin and slope. The black shale develops in the shelf lagoon, and the dolomite in the tidal flats. The black shale of the Doushantuo Formation in West Hubei region develops in Segment Band D, and the TOC value (mass fraction) is mostly higher than 2%, and the TOC value in Segment Dhigher than segment B. The differences about TOC value depend on different sedimentary environments. The water power, paleosalinity and oxidation reduction environment can reflect the differences of the sedimentary environment. The results can guide the exploration of shale gas. Key words: Doushantuo Formation; black shale; sedimentary environment; TOC; geochemistry; West Hubei — 上扬子地区上震旦统下志留统黑色页岩微孔隙特征 叶玥豪刘树根孙玮冉波杨迪王世玉罗超万洪程 “” 610059 （油气藏地质及开发工程国家重点实验室（成都理工大学），成都）