塔里木盆地西南部白垩系—古近系沉积特征与储盖组合

发布时间：2018-03-11 14:24

本文选题：储盖组合　切入点：沉积特征　出处：《石油实验地质》2017年03期 　论文类型：期刊论文

【摘要】：通过对塔里木盆地西南部中新生代地层沉积研究表明,早白垩世继承了侏罗纪的沉积面貌,以陆相沉积占主导,从晚白垩世初到渐新世,受特提斯海洋壳扩张影响,海水多次自西向东侵漫到喀什、叶城及和田等地区,形成了西塔里木海湾。受同期全球海平面整体上升时期大规模海侵影响,塔西南上白垩统—始新统乌拉根组主要发育海相沉积,之后受同期全球海平面整体下降时期海退影响,始新统—渐新统巴什布拉克组为陆相沉积。塔西南晚白垩世—古近纪由于海平面的频繁变化,发育了滨海、浅海—o_湖相的碳酸盐岩、膏盐岩及泥岩沉积体系,形成了上白垩统依格孜牙组碳酸盐岩与上覆古近系阿尔塔什膏盐岩及古近系卡拉塔尔组碳酸盐岩与上覆乌拉根组深色泥岩2套重要的储盖组合,是塔西南地区油气勘探值得重视的重要领域。
[Abstract]:The study of Meso-Cenozoic strata in the southwest of Tarim Basin shows that the early Cretaceous inherited the sedimentary features of the Jurassic, dominated by continental sediments, and was affected by the Tethys oceanic crust spreading from the early late Cretaceous to the Oligocene. Sea water has repeatedly penetrated from west to east to Kashgar, Yecheng and Hotan regions, forming the West Tarim Bay, which was affected by large-scale transgressions during the same period of global sea level rise as a whole. The Upper Cretaceous to Eocene Wulagen formation in southwest Tarim mainly developed marine deposits and was subsequently influenced by the regression of the global sea level during the same period. The Eocene-Oligocene Bashburak formation is a continental deposit. Due to frequent sea level changes in the late Cretaceous to Paleogene in southwest Tarim, carbonate rocks, gypsum and mudstone sedimentary systems of littoral, shallow-o- _ lacustrine facies have been developed. The carbonate rocks of the Upper Cretaceous Yigezi formation and the Altash salt rock of the Upper Paleogene, and the carbonate rocks of the Paleogene Caratar formation and the dark mudstone of the Ulagen formation of the Upper Cretaceous have been formed, and two sets of important reservoir cap assemblages have been formed. It is an important field of oil and gas exploration in southwest of Tata.
【作者单位】：中国石化西北油田分公司;成都理工大学;中国地质大学;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(2011ZX05002-003)资助
【分类号】：P618.13

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