长排列大容量准三维地震勘查技术在湍流海区的应用

doi:10.11720/wtyht.2022.2372

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Abstract

The long-streamer and large-capacity quasi-3D seismic survey technology is used to obtain 3D seismic data that cover the study area equal times under different source-detector distances.To this end,it obtains high-density acquisition of seismic data using a single source array in shooting,a single long cable for data receiving,and traditional 2D acquisition.Meanwhile,it conducts bin regulation using the 5D interpolation method according to the 3D process flow.This technology can used to effectively improve the seismic imaging effects in medium-deep parts in turbulent sea areas,thus satisfying the need for oil and gas exploration.This study primarily introduces the key methods for the acquisition and processing of seismic data.

Key words： South China Sea quasi-3D seismics turbulence oil and gas

Received: 05 September 2020 Published: 28 June 2022

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	Articles by authors
	Guang-Jian ZHONG
	Li ZHANG
	Gui-Lin DENG
	Hai YI
	Chang-Mao FENG
	Ming SUN
	Jing ZHAO
	Zhong-Quan ZHAO

Cite this article:

Guang-Jian ZHONG,Li ZHANG,Gui-Lin DENG, et al. Application of long-streamer and large-capacity quasi-3D seismic survey technology in turbulent sea areas[J]. Geophysical and Geochemical Exploration, 2022, 46(2): 402-409.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2022.2372 OR https://www.wutanyuhuatan.com/EN/Y2022/V46/I2/402

Ocean current distribution in the northern of South China Sea

Layout of 6 400 in³ gun array

Relative position map of seismic source and cable

Seismic acquisition parameters

Original bin coverage map

Expanded bin coverage map

Quasi-three-dimensional seismic data processing flow

Synoptic map of deghost

Frequency analysis before and after deghost

Comparison of gather before(a) and after(b) deghost

Comparison of stacking profile before(a) and after(b) deghost

Comparison stacking profile before(a) and after(b) five-dimension interpolation

Coverage plot of initial data

Coverage plot after interpolating

Comparison of 2D profile(a) with 3D profile(b)

Seismic reflection characteristics of submarine fan

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