长宁页岩气田宁211井五峰组—龙马溪组生物地层

发布时间：2019-08-09 17:27

【摘要】：长宁页岩气田是中国页岩气勘探和开发最早的页岩气田之一。对长宁页岩气田宁211井钻井剖面的五峰组—龙马溪组黑色页岩开展了岩石地层及生物地层研究,建立了从上奥陶统凯迪阶上部的Dicellograptus complexus带(WF2带)至志留系兰多维列统埃隆阶顶部的Stimulograptus sedgwickii带(LM8带)的12个连续生物带和组合,这一生物地层序列可实现区域和全球的精确对比。通过岩石地层和和生物地层的对比,发现各岩石地层与生物带具有极强的耦合关系,宁211井主要目的层五峰组—龙马溪组龙一1亚段大致对应Dicellograptus complexus带(WF2带)-Coronograptus cyphus带(LM5带)。长宁页岩气田与长宁背斜及其周缘具有相同的沉积环境。
[Abstract]:Changning shale gas field is one of the earliest shale gas fields in China. The lithostratigraphy and biostratigraphy of the black shale of Longmaxi formation, which is the Wufeng formation and Longmaxi formation of well Ning 211 in Changning shale gas field, have been studied. Twelve continuous biological zones and assemblages from the Dicellograptus complexus belt (WF2 zone) in the upper part of the Upper Ordovician Kaidi stage to the Stimulograptus sedgwickii belt (LM8 belt) at the top of the Silurian Lanyilei Elong stage have been established. This biostratigraphy sequence can be accurately compared between the region and the world. Through the correlation between lithostratigraphy and biostratigraphy, it is found that each lithostratigraphy has a strong coupling relationship with biological belts. The main target layer of well Ning211, Wufeng formation-Longmaxi formation, is roughly corresponding to Dicellograptus complexus belt (WF2 belt)-Coronograptus cyphus zone (LM5 belt). Changning shale gas field has the same sedimentary environment as Changning anticlinal and its circumference.
【作者单位】：中国石油西南油气田公司勘探开发研究院;页岩气评价与开采四川省重点实验室;中国石油西南油气田公司页岩气勘探开发部;中国石油西南油气田公司华油公司;
【基金】：国家自然科学基金青年科学基金项目(No.41502150) 四川省科技支撑计划项目“四川盆地下古生界页岩气资源潜力评价及选区”(2015SZ0001)
【分类号】：P618.13;Q911

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