基于可控震源的中浅部地震勘探参数选择

doi:10.11720/wtyht.2021.1145

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Abstract

The vibrator has been widely used in petroleum,coal field and other seismic exploration,and the corresponding technical means are relatively mature;nevertheless,there is no reference basis for the parameter selection of middle and shallow seismic exploration with vibrator.In order to study how to obtain high quality data in middle and shallow seismic exploration,the authors carried out a series of "vibrator excitation,high frequency geophone reception" experiments in Xiong'an.Based on a large number of experimental data and using qualitative analysis of original single shot and quantitative analysis of frequency spectrum,this paper systematically discusses the influence of the selection of parameters such as vibration number of vibrator,sweep length,starting frequency,ending frequency,drive level,slope length and natural frequency of geophone on data quality.This paper clarifies the key points and basis of parameter selection,puts forward the concept of high cutoff frequency,and summarizes the strategy of parameter selection for middle and shallow seismic exploration,which provides some reference for the use of vibrator in middle and shallow seismic exploration.

Key words： seismic exploration vibrator shooting parameters high frequency geophone data acquisition

Received: 10 April 2020 Published: 20 August 2021

ZTFLH:

P631.4

Corresponding Authors: MA Xue-Mei E-mail: xxl0306@126.com;247523354@qq.com

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	Articles by authors
	Xing-Long XIE
	Xue-Mei MA
	Hui LONG
	Qiu-Chen LI
	Shu-Jun GUO
	Zheng-Pu CHENG

Cite this article:

Xing-Long XIE,Xue-Mei MA,Hui LONG, et al. The parameter selection of middle and shallow seismic exploration based on vibrator[J]. Geophysical and Geochemical Exploration, 2021, 45(4): 1004-1013.

URL:

https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1145 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I4/1004

The layout of the test field

The diagram of window selection for spectrum analysis

Spectrum comparison of different vibration times

Spectrum comparison of different sweep lengths

Spectrum comparison of different drive levels

Spectrum comparison of different slope lengths

Single shot record comparison of different starting frequencies

Spectrum comparison of different starting frequencies

Single shot record comparison of different ending frequencies

Spectrum comparison of different ending frequencies

Single shot record comparison of different geophone

Spectrum comparison of different geophone

Single shot record comparison of different geophone at vibrator output of 30%

Seismic stack profile comparison of different geophone

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