摘要
从区域地质背景出发,对岩心的颜色、岩石类型、沉积构造、生物特征及粒度分布等沉积相标志进行了综合研究,结合测井资料,认为安塞油田塞431井区长2油层沉积期主要为曲流河三角洲平原亚相沉积环境。可进一步分为分流河道、边滩(点砂坝)、决口扇、天然堤及分流河道问洼地等五种沉积微相。对不同沉积微相特征进行了分析,并建立了该区长2油层组沉积相模式,储集砂体以分流河道、边滩(点砂坝)砂体为主,决口扇、天然堤等次之。顺着物源方向,砂体连通性较好,物性较好,非均质性弱;垂直于物源方向砂体连通性、物性较差,非均质性强。
Based on geologic background,combining with log- ging data of Chang2 reservoir of Sat431 wellblock of Ansai oilfield,a comprehensive study on the marks of sedimen- tary facies has been made up,core's color,rock types, sedimentary structures,biological features and grain size distribution included,and it is considered to be a mean- dering river delta plain subfacies which can be further di- vided into distributary channel microfacies,point bar mi- crofaeies,natural levee microfacies,flood-plain splay microfacies and interdistribution bay microfacies et al.Af- ter the analysis of different sedimentation features,sedi- mentary models in Chang2 reservoir are established.Ma- jor reservoir sandstone bodies include distributary channel and point bar microfacies.Good connectivity and physical property and poor inhomogeneity are identified along the parallel direction of sediment supply,and vice versa along the vertical direction of sediment supply.
出处
《石油地质与工程》
CAS
2007年第3期11-13,共3页
Petroleum Geology and Engineering
基金
本文为中石油创新基金(2002.8)
油气资源与勘探技术教育部重点实验室研究成果。
关键词
安塞油田
长2油层
曲流河
沉积微相
Ansai oilfield
Chang2 reservoir
meandering river
sedimentary microfacies
作者简介
李相明，1964年生，1991石油大学石油地质专业毕业，现为中国地质大学博士研究生，研究方向沉积储层。
