河北地质大学学报2025，Vol.48Issue(2)：32-41,10.DOI:10.13937/j.cnki.hbdzdxxb.2025.02.004
准噶尔盆地昌吉油田吉7井区P3wt21砂组沉积演化特征
Sedimentary Evolution Characteristics of Sand Group 2 in the First Member of Upper Permian Wutonggou Formation in Ji 7 Well Area,Changji Oilfield,Junggar Basin
王炜龙 1胡可 1徐田录 1罗鸿成 1魏庆婷 1王青春 2危宇宁 3贺萍2
作者信息
- 1. 新疆油田公司 吉庆油田作业区,新疆 昌吉州 831700
- 2. 河北地质大学 地球科学学院,河北 石家庄 050031
- 3. 辽河油田公司 辽兴油气开发公司,辽宁 盘锦 124213
- 折叠
摘要
Abstract
Combined with regional geological background,seismic,logging and core data,through the fine division and comparison of strata,the Sand Group 2 of the First Member of Upper Permian Wutonggou Formation(P3wt21)in Ji 7 well area of Changji Oilfield in Junggar Basin is divided into three layers:P3wt2-11,P3wt2-21 and P3wt2-31.Based on the analysis of core facies,logging facies and sedimentary cycles,through the analysis of single well,profile and plane sedimentary microfacies,it is considered that the rock types of P3wt21 sand group in the study area are mainly conglomerate,glutenite,sandstone and other coarse clastic rocks,which are formed in the braided river delta-lake sedimentary environment,among which the delta front underwater distributary channel,overflow sand and sheet sand microfacies play a leading role.In the evolution process,the vertical evolution is characterized by frequent transformation of underwater distributary channels,interspersed with overflow sand and interdistributary bays microfacies.On the plane,the sediments are mainly transported from the southeast of the study area.In the early stage,the underwater distributary channel microfacies of the braided river delta front subfacies were the main ones.Then,with the decrease of hydrodynamic conditions,the sedimentary range of the underwater distributary channel microfacies gradually decreased,and the overflow sand microfacies and the interdistributary bay microfacies gradually increased.关键词
吉 7 井区/梧桐沟组/辫状河三角洲/水下分流河道微相/漫流砂微相/席状砂微相Key words
Ji 7 well area/Wutonggou Formation/braided river delta/underwater distributary channel microfacies/overflow sand microfacies/sheet sand microfacies分类
能源科技引用本文复制引用
王炜龙,胡可,徐田录,罗鸿成,魏庆婷,王青春,危宇宁,贺萍..准噶尔盆地昌吉油田吉7井区P3wt21砂组沉积演化特征[J].河北地质大学学报,2025,48(2):32-41,10.
