塔东地区寒武-奥陶系沉积相与沉积演化模式

CHARACTERISTICS OF CAMBRIAN-ORDOVICIAN SEDIMENTARY FACIES IN TADONG REGION AND ITS SEDIMENTARY MODEL

在地震地层学和海相碳酸盐岩沉积模式的指导下,以单井沉积相分析和地震资料为基础,结合钻井、地表露头资料分析,对塔里木盆地塔东地区寒武-奥陶系沉积相进行了详细的研究,识别出塔东地区寒武-奥陶系沉积相具有西部碳酸盐岩台地相区、东部盆地相区和中间过渡带斜坡相区的典型三分结构。在对沉积相平面展布、沉积演化等沉积体系分析的基础上,综合考虑了古地理沉积环境、沉积相平面组合规律及控制因素,建立了塔东地区寒武-奥陶系沉积演化模式。

According to seismic stratigraphy and the depositional models of marine carbonate rocks, the sedimentary facies of the Cambrian-Ordovician strata in the Tadong region is interpreted on the basis of sedimentary facies of single wells, seimic data, as well as drilling and surface outcrop data. The sedimentary facies in the region is of typical trisection units, which are western carbonate platform facies, eastern basin facies and slope facies of middle transition belts. The sedimentary model of the Cambrian-Ordovician strata in the region is set up by analyzing the sedimentary facies, sedimentary evolution, sedimentary systems, paleo-environment and planar assemblage of sedimentary facies.