上扬子地区五峰组-龙马溪组页岩层序地层及演化模式

发布时间：2018-01-14 21:03

本文关键词：上扬子地区五峰组-龙马溪组页岩层序地层及演化模式　出处：《地球科学》2017年07期 　论文类型：期刊论文

【摘要】：学者们在页岩层序划分与构成等方面还存在较大分歧;其次,现有研究中针对页岩非均质性在层序格架内的变化特征及成因规律方面亦有不足.五峰组-龙马溪组页岩是上扬子地区重要的页岩气勘探层位之一,通过钻井岩心、露头剖面、常规测井、能谱测井和地球化学参数等资料,对上奥陶统五峰组-下志留统龙马溪组黑色页岩层序地层学进行了定量分析.在五峰组-龙马溪组识别出3个三级层序,其中五峰组为一个三级层序,进一步划分出海侵体系域(五峰组下部黑色页岩)和高位体系域(五峰组上部观音桥段);龙马溪组一段作为一个三级层序,进一步划分出海侵体系域、早期高位和晚期高位体系域;龙马溪组二段和三段为一个三级层序,进一步划分出低位体系域、海侵体系域和高位体系域.以不同体系域为单元分析了五峰组-龙马溪组层序发育与沉积环境特征,揭示了各体系域内古生产力与水体氧化还原条件对有机质富集的控制机理,总结并提出了系统的五峰组-龙马溪组黑色页岩层序地层垂向演化模式.
[Abstract]:The scholars also have considerable differences in shale sequence stratigraphy and other aspects; secondly, the existing research on shale heterogeneities in the sequence framework of the changes in the characteristics and causes of law is also inadequate. The five peak - Longmaxi shale is an important exploration of shale gas exploration in the Yangtze area layer, through cores outcrop, logging, logging, and geochemical parameters of the upper Ordovician five peak formation and Lower Silurian Longmaxi formation black shale sequence stratigraphy are quantitatively analyzed. In the five peak group - Longmaxi group identified 3 three level sequence, which is a group of five peaks three level sequence, to further divide the transgressive system tract (five lower peak group black shale and HST (five) peak group; upper Guanyinqiao member) Longmaxi period as a three grade sequence, to further divide the transgressive system tract, early and late high HST; longmaxiformation two and three segments for a three grade sequence, further divided into lowstand, transgressive and highstand system tracts. In a different system as a unit of the five peak group - Longmaxi sequence development and sedimentary environments, reveals the system of ancient productivity and water redox condition on the control mechanism of organic matter enrichment, summarized and put forward five peak group system Longmaxi black shale sequence stratigraphic vertical evolution model.

【作者单位】：中国石化勘探分公司;
【基金】：中国石油化工股份有限公司基础研究项目(No.P15074)
【分类号】：P618.13
【正文快照】： 0引言层序地层学经历了40年的发展,已形成了一套比较完整的油气藏甜点段勘探预测的思路与方法,在油气勘探开发领域发挥重要作用(Catuneanu andZecchin,2013;Zecchin and Catuneanu,2013;Hemmesch et al.,2014;Kohl et al.,2014;周翔等,2016).随着美国Barnett页岩、Marcellus页

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