苏里格气田山1段高分辨率层序地层学分析

The analysis of High-resolution Sequence Stratigraphic in the SHAN-1 Member,in Sulige Gas Field

苏里格气田单砂体的空间分布复杂,下步高效开发气藏难度大。基于区域地质、沉积相、测井、钻井、岩心资料,以Cross高分辨率层序地层学理论及其技术方法为指导,采用多级旋回层序划分方案,结合测井相分析技术,对苏里格气田山西组山1段进行了高分辨率层序地层学及测井相研究。通过精细划分和对比,共识别出1个长期、3个中期和7个短期基准面旋回层序,建立了区内高分辨率地层对比格架。上述沉积相划分和小层对比格架的建立加深了对研究区砂体纵横向展布规律的认识,为合理制订下步滚动勘探开发方案提供了地质依据。

The difficulty of the further high efficiency exploitation of gas reservoir is great because of the complexity of the spatial distribution of single sand body in Sulige Gas Field. Basing on the regional geology, sedimentary facies, well logging, well drilling and coring data, the study of high--resolution sequence stratigraphy and electrofaeies in the SHAN--1 member of Shanxi Formation in it, guided by the theory, technique and method of Cross＇s high--resolution sequence stratigraphy, adopts the scheme of multistage sequence cycle division and associates analysis--technique of electrofacies. This paper not only recognizes 1 long--term, 3 mid--term and 7 short--term base level cycle sequences after fine classification and correlation but also establishes stratigraphic correlation framework with High--resolution in this area. The division of sedimentary facies and establishment of subsequence correlation framework above enhance the understanding for the discipline of the vertical--horizontal distribution of sand body in this area ,which affords geological foundations for the planning of reasonable cycling exploitation-- development scheme in next step.