海上地震勘探斜缆采集中鬼波产生机理及压制效果分析

doi:10.11720/wtyht.2022.2337

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Abstract

In marine oil and gas exploration,for the purpose of accurately acquiring the high-precision and high-resolution reflection information of the exploration target and realizing more delicate imaging,broadband acquisition and processing technology of marine seismic has been greatly innovated and developed in recent years.In this paper,the generation mechanism of ghost wave,the classification and characteristics of ghost wave and its manifestation in actual seismic data are studied.The high-resolution radon transform in frequency domain is used as the main processing method to attenuate ghost wave in a broad-band data of a straight slant cable.After the ghost wave suppression processing,the source ghost wave and cable ghost wave of seismic data have been greatly attenuated,and the notch energy has been significantly enhanced.The broadband processing not only broadens the low-frequency component of seismic data,but also broadens the high-frequency component of seismic data;especially,the low-frequency component energy has been significantly enhanced.This method has achieved good results in the application of marine seismic data.

Key words： ghost wave attenuation notch slant cable acquisition broadband processing

Received: 01 November 2020 Published: 25 February 2022

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	Articles by authors
	De-Zhi MA
	Wei WANG
	Ming-Xia JIN
	Hai-Kun WANG
	Ming-Qiang ZHANG

Cite this article:

De-Zhi MA,Wei WANG,Ming-Xia JIN, et al. Generation mechanism of ghost wave in marine seismic exploration and ghost wave attenuation from marine seismic data[J]. Geophysical and Geochemical Exploration, 2022, 46(1): 175-181.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.2337 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I1/175

Diagram of seismic wave and ghost wave propagation

Reflected wave and ghost wave at the seabed of actual seismic data

Ghost wave time series

Frequency response curve of ghost wave

2D wave propagation diagram for slant cable exploration

Comparison of straight slant cable before and after ghost attenuation
a—raw shot;b—receiver ghost attenuation;c—source and receiver ghost attenuation

Spectrum comparison on shot gather of straight slant cable before and after ghost attenuation

Stack section comparation of straight slant cable data before and after ghost attenuation
a—raw stack;b—receiver ghost attenuation;c—source and receiver ghost attenuation

Spectrum comparison on stack profile of straight slant cable data before and after ghost attenuation

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