反射地震在冀中坳陷保定凹陷精细地质结构探测中的应用

doi:10.11720/wtyht.2022.1593

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Abstract

The Baoding sag is located on the western margin of the Jizhong depression,Bohai Bay basin.It is adjacent to the uplift of the Taihang Mountains in the west,with the piedmont fault of the Taihang Mountains as the boundary.Identifying the deep structures and fine-scale geological structure of the sag is greatly significant for the hydrocarbon exploration and the survey and evaluation of deep thermal reservoirs in the sag.Meanwhile,it also facilitates the research on the characteristics of the piedmont fault of the Taihang Mountains.Since the exploration using the seismic reflection method feature high precision and high resolution in the detection of deep geological structure,this study conducted the seismic reflection-based exploration in the tectonic units of the Baoding sag and their periphery.First,high-quality original seismic records were obtained by means of explosive source excitation,long-array multi-channel reception,and high coverage times.Then,seismic reflection sections that can clearly reflect the deep geological structure and structural characteristics of the survey area were obtained using high-precision imaging data processing techniques,such as static correction,pre-stack noise attenuation,deconvolution,and offset stack.The obtained seismic sections allowed for determining the characteristics of faults in the sag and internal secondary tectonic units.Based on the angular unconformities identified in the seismic sections,the basement structural layer and the structural layers formed during the faulting stage and the depression stage of the Baoding sag were also determined,and,accordingly,the tectonic evolutionary process of the three structural layers were discussed.

Key words： Jizhong depression Baoding sag seismic reflection survey piedmont fault of Taihang Mountains structural characteristics

Received: 21 December 2021 Published: 03 January 2023

ZTFLH:

P631.4

Corresponding Authors: YUE Hang-Yu E-mail: zbaowei@mail.cgs.gov.cn;yuehangyu_cgs@163.com

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	Articles by authors
	Bao-Wei ZHANG
	Hang-Yu YUE
	Wei XIE
	Su FANG
	Hao XU
	Kai WANG

Cite this article:

Bao-Wei ZHANG,Hang-Yu YUE,Wei XIE, et al. Application of the seismic reflection method in detecting the fine-scale geological structure of the Baoding sag,Jizhong depression[J]. Geophysical and Geochemical Exploration, 2022, 46(6): 1359-1368.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.1593 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I6/1359

Division map of structural units in Jizhong Depression

Flow chart of high-precision reflection seismic data processing

Comparison of single shot records before(a) and after(b) static correction

Local comparison of seismic section before(a) and after(b) static correction

Comparison of single shot records before(a) and after(b) pre-stack noise suppression

Comparison of seismic section before(a) and after(b) pre-stack noise suppression

Comparison of single shot records before(a) and after(b) deconvolution

Comparison of spectrum analysis before(a) and after(b) deconvolution

Local comparison of seismic section before(a) and after(b) deconvolution

Local comparison of seismic section before(a) and after(b) migration

Seismic interpretation section of AA’

Seismic interpretation section of BB’

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