上扬子地区下寒武统页岩沉积相类型及分布特征

发布时间：2018-02-04 09:17

本文关键词： 页岩岩相沉积相下寒武统筇竹寺组下寒武统梅树村组上扬子地区四川盆地　出处：《石油勘探与开发》2017年01期 　论文类型：期刊论文

【摘要】：通过露头、岩心、薄片、矿物X衍射、氩离子抛光、扫描电镜及钻井资料的综合研究,在上扬子地区寒武系梅树村组沉积期—筇竹寺组沉积期沉积地层中识别出9种页岩岩相、5类沉积相标志,提出了页岩沉积相类型精细划分方案,建立了页岩沉积演化发育模式。指出梅树村组沉积期与筇竹寺组沉积期在沉积作用方式、沉积体系类型及沉积相分布上均存在差异:梅树村组沉积期以机械-化学沉积和生物沉积为主,主体为碳酸盐缓坡台地—陆棚—斜坡—深水盆地沉积体系;筇竹寺组沉积期以砂质机械沉积、泥质絮凝及生物沉积为主,主体为滨岸—陆棚—斜坡—深水盆地沉积体系。资阳—长宁近南北向展布的地区、东南部鄂西—渝东—黔中及东北部宜昌—房县一线的地区为两个深水陆棚相富有机质页岩沉积中心,是页岩气勘探有利地区,但前者富有机质页岩以多层、薄层为特点,后者以连续厚层为特点,今后应考虑其差异进行有针对性的页岩气勘探部署。
[Abstract]:A comprehensive study of outcrops, cores, thin slices, X-ray diffraction of minerals, argon ion polishing, scanning electron microscopy and drilling data was carried out. Nine types of shale facies and five types of sedimentary facies were identified in the sedimentary strata of the Cambrian Meishucun formation and Qiongzhusi formation in the upper Yangtze area, and the fine classification scheme of the shale sedimentary facies types was put forward. The sedimentary evolution and development model of shale is established. It is pointed out that the sedimentary stages of Meishuncun formation and Qiongzhusi formation are in the sedimentary mode. There are differences in the types of sedimentary systems and the distribution of sedimentary facies: the main sedimentary systems of Meishucun formation are mechanical-chemical deposition and biological deposition, mainly carbonate gentle slope platform, continental shelf, slope and deep water basin sedimentary system; The sedimentary period of Qiongzhusi formation is mainly composed of sandy mechanical deposition, muddy flocculation and biological deposition, and the main body is shoreline, shelf, slope and deep water basin sedimentary system. There are two deep shelf facies rich in organic matter shale sedimentary center in southeastern Hubei, eastern Chongqing, central Guizhou and Yichang Fangxian in the northeast, which are favorable areas for shale gas exploration, but the former is rich in organic matter shale with multiple layers. The thin layer is characterized by the continuous thick bed, which should be considered for shale gas exploration and deployment in the future.
【作者单位】：页岩油气富集机理与有效开发国家重点实验室;中国石化石油勘探开发研究院;中国石化页岩油气勘探开发重点实验室;中国地质大学(北京);
【基金】：国家自然科学基金项目(41202103) 中国石油化工股份有限公司科技开发部项目(P15114)
【分类号】：P618.13
【正文快照】： 引用:刘忠宝,高波,张钰莹,等.上扬子地区下寒武统页岩沉积相类型及分布特征[J].石油勘探与开发,2017,44(1):21-31.LIU Zhongbao,GAO Bo,ZHANG Yuying,et al.Types and distribution of the shale sedimentary facies of the Lower Cambrian inUpper Yangtze area,South China[

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