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Quantitative assessment method for feathering drifting of maritime three-dimensional seismological observation system

An observation system and quantitative evaluation technology, applied in the direction of seismic signal processing, etc., can solve the problem of unable to quantitatively evaluate plume drift, etc., and achieve the effect of improving fidelity

Active Publication Date: 2011-04-13
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to overcome the defect that the existing marine seismic observation system analysis technology cannot quantitatively evaluate the plume drift, and propose a quantitative evaluation method for the plume drift of the marine three-dimensional seismic observation system

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  • Quantitative assessment method for feathering drifting of maritime three-dimensional seismological observation system
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  • Quantitative assessment method for feathering drifting of maritime three-dimensional seismological observation system

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0020] The purpose of the present invention is to overcome the defect that the existing marine seismic observation system analysis technology cannot quantitatively evaluate the plume drift, and propose a quantitative evaluation method for the plume drift of the marine three-dimensional seismic observation system.

[0021] Such as figure 2 Shown, the specific implementation steps of the present invention are as follows:

[0022] 1) Import seismic observation system data in various standard formats.

[0023] 2) Classify the shot point and receiver point information of each bin position in the observation system data:

[0024] Use the imported seismic observation system data to calculate the shot point and receiver point attribute distribution of each panel of the 3D observation system, including coverage times, offset distance and azimuth angle, etc....

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Abstract

The invention relates to a quantitative assessment method for the feathering drifting a maritime three-dimensional seismological observation system, which comprises the following steps of: 1) importing maritime seismological observation system data; 2) classifying information of source points and demodulator probes at binning positions in the observation system data; 3) calculating weight coefficients of each group of offset pairs according the transmission-reflection-transmission characteristic of seismic waves; 4) summarizing weight coefficients of all binning positions to obtain seismic wave amplitude values at all binning positions of a target horizon, and drawing a binning amplitude distribution map; and 5) performing statistic analysis on the binning amplitude distribution map, calculating the mean-square deviation of the binning amplitude distribution map to realize the quantitative assessment of feathering drifting, wherein when a mean-square deviation value is smaller, the degree of the feathering drifting is smaller. In the method, three-dimensional seismic wave does not need to be simulated, the influences of different kinds of feathering drifting on the distribution ofoffset points can be calculating directly in an analytical mode, and the influence degree of the feathering drifting on seismic wave amplitude energy can be analyzed, so that the quantitative assessment on the feathering drifting degree of the integral maritime seismological observation system is realized.

Description

technical field [0001] The invention relates to an analysis and evaluation technology for a three-dimensional seismic exploration system for petroleum seismic exploration, in particular to a quantitative evaluation method for plume drift of an offshore three-dimensional seismic observation system. Background technique [0002] The ocean is the largest treasure house of oil and gas resources on the earth. With the development of science and technology and the continuous improvement of people's living standards, people's demand for energy is increasing. Therefore, the development and utilization of offshore oil and gas resources is one of the fundamental ways to solve energy replacement. The total length of China's coastline is about 18,000 kilometers, and the jurisdictional sea area of ​​the 200 nautical mile exclusive economic zone is about 3 million square kilometers. my country's offshore is rich in oil and gas resources. According to the second national census of oil and...

Claims

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Application Information

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IPC IPC(8): G01V1/30
Inventor 赵伟符力耘翁斌安琪姜秀娣宋亮刘永江杨俊李丽霞魏伟
Owner CHINA NAT OFFSHORE OIL CORP
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