塔里木盆地塔中-塔北志留系层序地层

随着近年来塔里木盆地勘探开发的逐步深入,志留系地层已经成为众多学者的研究热点。本文应用层序地层研究方法,利用钻井、测井、地震及实验分析资料,通过对岩石地层、测井地层、生物地层、地震地层等资料的综合分析,将塔里木盆地志留系地层划分为3个三级层序,SQ1对应柯坪塔格组下段,SQ2对应柯坪塔格组中上段,SQ3对应塔塔埃尔塔格组。每个层序由海侵体系域和高位体系域组成,不发育低位体系域。对层序格架内的沉积类型和沉积相展布进行分析,认为主要发育扇三角洲相-有障壁潮坪相-浅海相。

Sequence stratigraphy of the Silurician strata in the northern and central Tarim Basin

Sequence stratigraphy and sedimentary facies distribution in the northern and central Tarim Basin are explored on the basis of cores, well logs, seismic and laboratory data with the aid of sequence stratigraphic method. The Silurician strata in the Tarim Basin may be grouped into three third-order sequences:SQ1 corresponding to the lower member of the Kalpintag Formation, SQ2 corresponding to the middle and upper members of the Kalpintag Formation and SQ3 corresponding to the Tata''airtag Formation, all of which consist of the transgressive and highstand systems tracts except the lowstand systems tract. Sedimentary facies within the sequence stratigraphic framework comprise the fan delta facies, barrier tidal-flat facies and neritic facies.