摘要
苏里格气田盒8气层组砂体厚度大、内部结构复杂、岩性变化快,砂体构型严重制约地下砂体和有效储层的认识,影响气井的井位部署、井轨迹设计及开发效果.基于储层构型分析方法,以古代露头和现代沉积构型模式为指导,采用岩心观察及测井曲线精细识别技术,分析盒8气层组储层成因及砂体构型,确定各构成单元的沉积特征、构型模式、规模和空间叠置方式.结果表明:盒8气层组为砂质辫状河沉积相,厚储层主要为辫状河道复合砂体,辫状河相划分为4类亚相、7类微相;辫状河道复合砂体内部为近水平或水平波状薄夹层构型模式,分为孤立型、横向局部连通型、堆积叠置型、切割叠置型等4类空间叠置模式.该研究结果为深化盒8气层组储层认识,指导该区水平井部署与明确地质导向提供依据.
The eighth member(H8)gas reservoir of Shihezi formation in Sulige gas field is of great thickness and complex internal structure,the lithology varies rapidly laterally,resulting in reservoir architecture severely constrains on the understanding degree of underground sandbody and the effective reservoir,and effects on the well deployment,well path design and development effectiveness of the vertical and horizontal wells.Based on the method of reservoir architecture analysis and guided by the architectural model from ancient outcrop and modern sediment,this paper,by means of the recognition technology by core and well logging curve,analyzes the genetic types and internal architecture of H8,clearly discriminating the sedimentary characteristics of each composition unit,architectural model,developing scale and spatial stacking patterns of braided channel.The results show that the study area is sandy braided river facies;thick reservoir is mainly braided compound channel sandbody,and identifies 4 types of subfacies and 7 microfacies,establishes its internal architecture mode of nearly horizontal or horizontal wavy thin interbed,4 types spatial stacking models of braided channel.The research results provide a solid geological basis for deepening the reservoir awareness,guiding the horizontal well and the geosteering.
出处
《东北石油大学学报》
CAS
北大核心
2014年第1期54-62,4,共9页
Journal of Northeast Petroleum University
基金
国家科技重大专项(2011ZX05015-1)
关键词
辫状河道
储层内部构型
有效储层叠置模式
苏里格气田
盒8气层组
braided channel
reservoir internal architecture
effective reservoir stacking mode
Sulige gas field
the eighth member gas reservoir of Shihezi formation
