大庆石油地质与开发2025，Vol.44Issue(3)：11-21,11.DOI:10.19597/J.ISSN.1000-3754.202312029
三角洲前缘亚相砂体连通性对简单斜坡油气成藏的控制作用
Control effect of delta front subfacies sandbody connectivity on simple slope oil and gas accumulation
摘要
Abstract
The study of sandbody connectivity is important for determining hydrocarbon migration laws in simple slopes.Taking Gaotaizi reservoir in Qijia area of Songliao Basin as target area,techniques of 3D stochastic reservoir modeling and total hydrocarbon chromatographic comparison of crude oil are used to study delta front subfacies sandbody connectivity and its control on simple slope accumulation.The results show that,lake flooding mudstone corresponding to mid-term cycle surface is effective roof of single sandstone carrier bed,and Gaotaizi reservoir is vertically divided into 4 sets of single sandstone carrier beds of S1-S4.Sandstone-strata thickness ratio is the most important factor to determine static sandbody connectivity,which controls rapid"S-shaped"increase of static sand-body connectivity.Same sandstone-strata thickness ratio affected by sandbody type and sandbody geometric parame-ters corresponds to static sandbody connectivity value in a certain range.Flow threshold value(C0)of sandstone-stra-ta thickness ratio of dynamic sandbody connectivity is higher than that of static sandbody connectivity,while com-plete connectivity coefficient(C)of dynamic sandbody connectivity is close to that of static sandbody connectivity.Hydrocarbon is mainly distributed in favorable zones with sandstone-strata thickness ratio of dynamic sandbody con-nectivity between C0 value and C value.The case study of Gaotaizi reservoir in Qijia area proves that the established method for evaluating sandbody connectivity can be applied to plays evaluation and targets optimization of simple slopes.关键词
简单斜坡/砂体连通性/砂地比/区带评价/松辽盆地Key words
simple slope/sandbody connectivity/sandstone-strata thickness ratio/plays evaluation/Songliao Basin分类
石油、天然气工程引用本文复制引用
赵玉武,潘国辉,彭承文,贺友志,刘宗堡,张云峰,王鸿军..三角洲前缘亚相砂体连通性对简单斜坡油气成藏的控制作用[J].大庆石油地质与开发,2025,44(3):11-21,11.基金项目
国家自然科学基金项目"基于储层构型理论解析的三角洲相致密砂岩储集性多级词次表征研究"(42172161). （42172161）
