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通过岩心、测井、地震以及分析化验等资料,对准噶尔盆地滴南凸起二叠系梧桐沟组进行了层序地层分析以及沉积相的识别,进而研究了层序沉积体系的分布配置关系,揭示了探区主要气藏分布规律。研究认为,滴南凸起二叠系梧桐沟组可以划分为2个三级层序SQⅠ-1和SQⅠ-2,SQⅠ-1为辫状河三角洲沉积,主要发育水进体系域和高位体系域,而SQⅠ-2主要发育水进体系域,为泛滥平原沉积。SQⅠ-1为主要产气层段,该层段有利油气聚集区主要位于构造隆起区所发育的辫状河三角洲前缘河道砂及河口砂坝上。
Through the core, logging, seismic and analytical laboratory data, the sequence stratigraphy and the identification of sedimentary facies have been carried out in the Wutonggou Formation of the Diannan uplift in the Junggar basin, and the distribution and arrangement of the sequence sedimentary system has been studied. Revealed the distribution of main gas reservoirs. The study indicates that the Dudonggou Formation Wutonggou Formation in Diannan uplift can be divided into two third-order sequences SQⅠ-1 and SQⅠ-2, and SQⅠ-1 is braided river delta sediments, mainly consisting of both water-in-system and high -standard systems , While SQⅠ-2 mainly developed into sedimentary system of floodplain. SQⅠ-1 is the main gas production interval. The favorable hydrocarbon accumulation zone of this interval is mainly located on the braided river delta front channel sand and estuary sand bar developed in the tectonic uplift.