四川盆地东北部二叠系长兴组海侵生物礁研究  

Study on Transgressive Reef of Permian Changxing Formation in Northeastern Sichuan Basin

作　　者：曾德铭[1] 王兴志[1] 伍辉[2] 张帆[1] 王一刚[3] 

机构地区：[1]西南石油大学资源与环境学院,成都610500 [2]中国石油大港油田分公司采油三厂,河北沧州061000 [3]中国石油西南油气田分公司勘探开发研究院,成都610050

出　　处：《新疆石油地质》2009年第6期677-679,共3页Xinjiang Petroleum Geology

基　　金：西南石油大学校级科技基金(2007XJZ047);教育部新世纪优秀人才支持计划(NCET-04-0911)共同资助

摘　　要：四川盆地东北部晚二叠世长兴期为碳酸盐台地-盆地(海槽)环境。在台地边缘和局部高地发育了较多的台地边缘礁和台内点礁。根据海平面上升速度和生物礁生长速度将这些生物礁划分为海侵追补型和海侵并进型,并对这两种类型的生物礁岩性组合、储集性及影响因素和分布进行了研究。并进型生物礁为水体向上变浅的岩性组合,经历白云岩化和埋藏溶解作用的强烈改造,白云岩和次生孔隙发育,储集性较好,主要分布于开江—梁平附近及其西南部的长兴组中、上部,为最有利的勘探区块。追补型生物礁为向上变深的岩性组合,主要由石灰岩组成,储集空间较少,储集性较差,主要分布于城口—鄂西地区以西的长兴组中、下部,在有裂缝的区域,可作为较有利的勘探区块。The Changxing formation of Late Permian in northeastern Sichuan basin is in the carbonate platform-basin （trough） sedimentary environment where many boundary reefs and point reefs occur in the edge and local upland in the platform. These reefs can be divided into the type of transgressive remedy and the type of transgressive advance side by side in terms of the rising speed of sea level and the growth rate of the reefs. Their lithologic association, storage and distribution are studied. The latter belongs to lithologic association to be shallower upward with water and reconstructed intensely by dolomitization and dissolution, with developed dolomite and secondary porosity as well as preferable reservoir quality, mainly distributed in the Middle-Upper Changxing formation nearby the KaijiangLiangping area, being the most favorable exploration target. The former is darken upward and composed of lime, with low porosity and poor reservoir quality, mainly distributed in the Middle-Lower Changxing formation nearby Chengkou-Exi area, being as the probable exploration target in its fractured area.

关 键 词：四川盆地 长兴组 生物礁 岩性组合 储集性 分布 

分 类 号：TE112.221[石油与天然气工程—油气勘探]