JY1井五峰组—龙马溪组钻井地质剖面是第一口较为系统的海相页岩气参数井剖面,JY1井取得勘探突破是涪陵页岩气田发现的标志,该井被重庆涪陵市政府命名为“页岩气开发功勋井”。以JY1井五峰组—龙马溪组钻井地质剖面为重点,阐述了该钻井剖面对页岩气勘探开发的重要意义,着重介绍了该剖面岩石地层、生物地层及笔石带划分及裂缝发育等特征,分析探讨了页岩气储层段“六性”特征及纵向分布规律,得出以下认识：①JY1井五峰组—龙马溪组地层厚度大、连续沉积、地层层序清晰、笔石门类齐全、区域可对比性好,可作为四川盆地及周缘五峰组—龙马溪组分析研究的钻井地质基干剖面;②受沉积相带影响,不同页岩气层段地质特征差异明显,其中五峰组—龙马溪组一段一亚段（①—⑤号小层）为深水陆棚相沉积,总体具有“高TOC、高孔隙度、高含气量、高硅质”的四高特征,是五峰组—龙马溪组勘探开发的主要页岩气“甜点”层段;③优质页岩气层中①—③号小层表现出地质、工程双“甜点”高度耦合的规律,是水平井“靶窗”优选的最佳层位。其中高伽马值的②号小层是保证水平轨迹、优质页岩钻遇率的最佳靶心位置。深水陆棚相的优质页岩及“靶窗”层位的确定是JY1井五峰组—龙马溪组页岩气勘探取得重大突破,实现持续稳产、高产的关键,也为后续页岩气勘探选区、选层提供了依据。

The drilling geological profile of Well-JY1 Wufeng Formation and Longmaxi Formation is the first systematic marine shale gas parameter well profile. The exploration breakthrough of Well-JY1 announces the discovery of Fuling shale gas field, which is named as“Shale Gas Development merit well” by Chongqing Fuling Municipal government. With the drilling geological section in Wufeng-Longmaxi Formation of Well-JY1 as the key point, the drilling profiles of the importance of shale gas exploration and development are expounded, the profile lithostratigraphic, biostratigraphic and graptolite biozone division and fracture development characteristics are introduced, and analyzed the period of “six”shale gas reservoir characteristics and vertical distribution are analyzed. The following conclusion are obtained. Firstly, the Wufeng-Longmaxi Formation in Well-JY1 has large thickness, continuous deposition, clear stratigraphic sequence, widest range of graptolite category and good regional comparability, which can be used as the basic drilling geological section for the analyses and researches of Wufeng-Longmaxi Formation in Sichuan Basin and its surrounding areas. Secondly, affected by sedimentary facies belt, the geological characteristics of different shale gas strata are obviously different. For example, the first interval of the first Member of Wufeng-Longmaxi Formation（small layer ①~⑤）, which belongs to the deep-water shelf facies generally with four high characteristic of “high TOC, high porosity, high air content, high siliceous”, is the main “sweet spot” of the shale gas exploration and development in this area. Thirdly, the small layer ①~③ in high quality shale gas reservoir, which show the high coupling law of double “sweet spot” of geological and engineering, are the optimal layers for the best target “window” of the horizontal wells. Among them, the small layer ② with high gamma value is the best position to ensure the horizontal trajectory and drilling ratio of high quality shale. The determination of high quality shale and the target “window” in deep-water shelf facies is the key for the major breakthrough of shale gas exploration in Wufeng-Longmaxi Formation of Well-JY1 and the continuous stable and high production, and also points out the direction for the selection of the areas and layers during the subsequent shale gas exploration.