石油物探2025，Vol.64Issue(3)：433-441,9.DOI:10.12431/issn.1000-1441.2023.0462
准噶尔盆地东道海子凹陷中、深层地震波组特征及地质意义
Characteristics and geological significance of seismic wave groups from medium-deep strata in Dongdaohaizi Sag,Junggar Basin
摘要
Abstract
The Dongdaohaizi Sag in the Junggar Basin has a great exploration potential,but it has been less explored.In this paper,selected deep wells and newly acquired 2D and 3D seismic data within the Dongdaohaizi Sag were used to produce synthetic seismic records and perform horizon calibration,so as to identify the characteristics of seismic wave groups from medium-deep strata in the sag and clarify the exploration potential of the study area.On the basis of log characterization and synthetic seismic record calibration,four clear reflection interfaces,T0,T1,T2,and T3,were identified at the top and bottom and in the interior of the medium-deep Permian system.The characteristics of main seismic wave groups from the medium-deep strata in the sag were summarized.Specifically,T0 is the interface between the Permian and the Carboniferous,and it is the key marker bed for regional correlation in the basin.T1 is the interface between the Permian Jiangjunmiao Formation and the Pingdiquan Formation with source rocks developed.T2 is the interface between the Pingdiquan Formation and the Upper Wuerhe Formation.T3 is the interface between the Triassic and the Permian,and it represents the response of the regional unconformity between the Late Permian and the Triassic.Based on the detailed interpretation of seismic profiles,the characteristics and geological significance of seismic wave groups from the medium-deep strata in the Dongdaohaizi Sag were revealed.It is found that the seismic profile of the Upper Wuerhe Formation(between T2 and T3),the key target horizon,is composed of 4-6 wave peaks and troughs,with moderate continuity,as well as the transverse attenuation of the strong event energy or frequency change,which reflects the characteristics of lithologic sand bodies deposited under the background of lake transgression.The"onlapped"wave group characteristics of the Upper Wuerhe Formation in the northwestern part of the sag reflect the existence of a large provenance system,making this area a favorable target for future risk exploration.关键词
准噶尔盆地/东道海子凹陷/二叠系/波组/地质意义Key words
Junggar Basin/Dongdaohaizi Sag/Permian/wave group/geological significance分类
石油、天然气工程引用本文复制引用
谢俊阳,潘拓,姚卫江,胡正舟,李艳平..准噶尔盆地东道海子凹陷中、深层地震波组特征及地质意义[J].石油物探,2025,64(3):433-441,9.基金项目
中国石油天然气股份有限公司科学研究与技术开发项目"北疆海相泥盆-石炭系油气地质研究"(2022DJ0507)资助.This research is financially supported by the Scientific Research and Technology Development Project under PetroChina Company Limited(Grant No.2022DJ0507). （2022DJ0507）
