【摘要】 二叠系长兴组为鄂西渝东区主要勘探层系之一,其沉积相展布有多种观点。应用地表露头剖面、钻井剖面分析及对比研究,结合地震属性分析,认为晚二叠世开江-梁平陆棚向东南延伸,并与鄂西-城口海槽相连;鄂西渝东区晚二叠世长兴组沉积期沉积格局受到开江-梁平陆棚和鄂西-城口海槽的联合控制,将该区划分成开阔台地相、台地边缘相、浅水陆棚相以及盆地相4个相带,其中的生物礁、滩主要分布于台地边缘,为天然气勘探的重要目标。更多还原

【Abstract】 Based on the analysis and comparative study of surface outcrop profiles and well drilling profiles in combination with analysis of seism and attribute,it was presented that in Late Permian,Kaijiang-Liangping shelf was extended to southeast and linked up with West Hubei-Chengkou trough;the sedimentary framework of Western Hubei-Eastern Chongqing Area of Changxing Formation at Late Stage Permian was controlled by Kaijiang-Liangping shelf and West Hubei-Chengkou trough,and was divided into 4facies zones,such as the open platform,the platform margin,the shallow water shelf,and the basin,where reefs and banks of the platform margin are an important area of marine oil/gas exploration in this area.更多还原