柴达木盆地尖顶山地区低频可控震源“两宽一高”地震资料处理关键技术应用研究

doi:10.11720/wtyht.2020.1280

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Abstract

In order to finely implement the characteristics of the Jianbei structure and fault system,explore the spatial distribution law of Jurassic strata,improve the imaging accuracy of breakpoints and sections,and implement the distribution of small faults and concealed faults so as to provide strong support for bedrock lithologic traps,the authors used high-precision seismic exploration technology with low-frequency vibrator "two widths and one high" (wide azimuth,wide band,high density) in this area.This technology can record wave field information more completely,with low frequency information and less space and false noise.It is conducive to the study of broadband processing and azimuthal anisotropy of thin interbedded reservoirs.In this paper,from the aspects of wave field characteristics,signal-to-noise ratio and frequency of the region,the authors used the low-frequency vibrator "two widths and one high" wide-band,wide-azimuth high-resolution amplitude-preserving processing technology to image small faults and bedrocks.The fine characterization shows that the "two widths and one height" method has unique advantages in wideband and wide-range data processing.

Key words： two-wide and one-high false frequency wave field anisotropy signal to noise ratio

Received: 15 May 2019 Published: 22 April 2020

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	Articles by authors
	Jin-Zhong ZHOU
	Jin-Hai ZHANG
	Quan-Bing NIU
	Hui-Yu ZHANG
	Hai-Feng WANG
	Bo ZHU
	Li LI
	Si YIN
	Na WANG

Cite this article:

Jin-Zhong ZHOU,Jin-Hai ZHANG,Quan-Bing NIU, et al. The key technique application research on low frequency vibrator "two-wide and one-high" seismic data processing in Jiandingshan area of Qaidam Basin[J]. Geophysical and Geochemical Exploration, 2020, 44(2): 313-320.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1280 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I2/313

“Two-wide and one-high” and conventional three-dimensional seismic observation system comparison

Conventional 3D seismic data and “two-wide and one-high” 3D seismic data single shot and spectrum comparison
a—conventional three-dimensional original single shot;b—"two-wide and one-high" three-dimensional original single shot;c—conventional 3D seismic data spectrum;d—"two-wide and one-high" 3D seismic data spectrum

Stacking profile and spectrum comparison before and after noise attenuation
a—stacking profile before noise attenuation;b—stacking profile after noise attenuation;c—comparative analysis of stacking profile spectrum before and after noise attenuation

Prestack time migration profile and spectrum comparison before and after low frequency compensation
a—prestack time migration profile before low frequency compensation;b—prestack time migration profile after low frequency compensation;c—prestack time migration spectrum before low frequency compensation;d—prestack time migration spectrum after low frequency compensation

Snail gather before and after azimuth anisotropy correction
a—snail gather before azimuth anisotropy correction;b—snail gather after azimuth anisotropy correction

Conventional prestack time migration and OVT domain prestack time migration profile and slice comparison
a—conventional prestack time migration profile;b—OVT domain prestack time migration profile;c—conventional prestack time migration slice;d—OVT domain prestack time migration slice

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