苏里格东三区南部下石盒子组盒8段沉积相研究

Study on sedimentary facies of He-8th member in upper Paleozoic in south of east Ⅲ in Sulige gas field

针对鄂尔多斯盆地的苏里格天然气气田东三区南部的上古生界的下石盒子组盒8段(是整个地区的主要产力层段)情况,分析采集到的岩心照片、测井、录井等资料,并结合前研究人员的成果,认为鄂尔多斯盆地的苏里格气田东三区南部盒8段的沉积相类型为典型的辫状河三角洲,并进一步细分为心滩、辫状河道、废弃河道、泛滥平原4种微相,其中最有利的储集砂岩为心滩砂体。在精细描述沉积相特征并结合沉积相图后,展开了对沉积微相及其平面展布特征的深入的研究,并分析了沉积相对储层的影响,为进一步开发和井网管理提供了基础。

The 8th member in the south of the east Ⅲ area in the Sulige gas field of Ordos Basin is the main productive forces. Analysed the collected core photo,well logging and logging date,and combined with the previous research results,the authors made the conclusion that the type of sedimentary facies of the south east Ⅲ block in Sulige area is braided river delta, it is divided into four kinds of micro facies, which are the heart beach, braided channel, abandoned channel and flood plain. The most favorable reservoir sandstones are the core sand bodies. Based on the fine description of the sedimentary facies and combined with sedimentary facies,the sedimentary microfa-cies and plane distribution characteristics were studied in details,the influence of sedimentary relative on reservoir was also analyzed, which provides the basis for further development and well pattern management.