【摘要】 在岩芯观察、测井及地震资料分析基础上,应用高分辨层序地层理论对准噶尔盆地阜康凹陷东部斜坡带中侏罗统头屯河组进行划分,共识别出1个长期旋回,3个中期旋回以及10个短期旋回。概括起来有2种基准面旋回基本结构类型,多种亚类型,且旋回总体划分与地层划分基本一致。通过对试油资料的分析与总结,发现研究区油层大部分位于中期旋回MSC2中SSC4和SSC7两个短期旋回中,因此重点对两个短期旋回沉积微相特征进行详细分析,认为两个旋回都位于辫状河三角洲前缘亚相,包括水下主河道、分流河道等四个主要沉积微相。通过连井对比、等时地层格架的建立、上升相域沉积微相图编制和砂体纵向及横向分布特征的描述,总体认为SSC7旋回中所发育的有利储集体发育厚度及砂体连通性要好于SSC4旋回中砂体,并对有利储集层分布进行预测。更多还原

【Abstract】 Based on the analysis of core observation,logging and seismic data,the Toutunhe Formation of Middle Jurassic in Fudong Slope Zone is divided into one long-term,three middle-term and ten short-term cycles under the theory of high resolution sequence stratigraphy. Summarizes,there are two basic structure types of baselevel cycle with many sub-types,and divisions on the whole cycles and stratas are basically identical. Because many oil layers are distributed in two short-term cycles named SSC4 and SSC7 by searching of oil production test data,the sedimentary characters in main short-term are needed detailed analysis that braided delta front deposits developed,which is mainly comprise of four sedimentary micro-facies, such as underwater main channels,distributary channels. Through well connection contrasts,establishment of isochronous stratigraphic framework,compilation of sedimentary micro-facies in uprising of cycles and description of sandbody distribution in vertical and plane,it shows thickness and connectivity of sandbodies in SSC7 are better than that developed in SSC4,which is more favorable for reservoirs development.更多还原