西安科技大学学报2018，Vol.38Issue(1)：126-136,11.DOI:10.13800/j.cnki.xakjdxxb.2018.0118
苏里格气田东二区二叠系山西组山2段沉积相特征及演化
Sedimentary facies characters and evolutions of Shanxi Formation in East Ⅱ block,Sulige Gas Field
摘要
Abstract
In order to understanding the types and characters of sedimentary facies of Shanxi Forma-tion's second member(S2)East Ⅱ Block in Sulige gas field,this paper has made a systematic study and a detailed description of sedimentary distribution and evolution of S 2's three single layers S32,S22 and S12from bottom to top,based on sedimentary theory,with the methods of single well facies analysis and sedimentary sequence study,combined cross well facies and sand thickness to formation thickness ratio characters using data on cores,thin section,well logging and so on.This study shows that,in north of this block during the deposition period of S2,near-source braided river facies with developing middle channel bar,braided river channel,flood plain,flooded swamp etc.deposition microfacies developed;and in south,meandering river facies,with point bar,meandering river channel,flood plain,nature lev-ee microfacies and characterized by"dual structure"in vertical,with meandering river channel at the bottom and flood plain at the top. The boundary of braided river facies and meandering river facies transferred from south to north for about 20 km during the deposition period of S2.These achievements help us to understand the law of sand distribution and thus to make a comprehensive study and evalua-tion of reservoir.This research also indicates that northern braided river middle channel bar and the southern meandering river point bar are favorable microfacies to effective reservoirs.关键词
沉积地质学/沉积相/辫状河/曲流河/苏里格气田Key words
sedimentary geology/sedimentary facies/braided river/meandering river/Sulige Gasfield分类
能源科技引用本文复制引用
吴小宁,李进步,赵忠军,王龙,朱亚军,付斌,罗文琴,吴小斌..苏里格气田东二区二叠系山西组山2段沉积相特征及演化[J].西安科技大学学报,2018,38(1):126-136,11.基金项目
国家科技专项(2016ZX05050) （2016ZX05050）
陕西省高水平大学建设专项资金资助项目(2013SXTS03) （2013SXTS03）
