A Noise Attenuation Method for Land Inspection of Submarine Cables

Abstract

The invention relates to a submarine cable land inspection noise attenuation method, comprising the following steps: simulating land inspection original seismic data with an AVO phenomenon by utilizing 3D high-order Tau-p inverse transformation; performing Tau-p direct transformation on the original seismic data by adopting 3D high-order high-resolution Tau-p transformation, so that Tau-p domain seismic data is obtained; setting slope parameters, and performing zero setting processing less than a threshold value on the Tau-p domain seismic data; inputting the Tau-p domain seismic data after zero setting into the 3D high-order high-resolution Tau-p transformation and performing Tau-p inverse transformation on the 3D high-order high-resolution Tau-p transformation, and transforming into a time domain, so that noise data is obtained; and subtracting the noise data obtained through the inverse transformation from the original seismic data, thus the original seismic data after a noise is removed is obtained. The method provided by the invention meets high resolution, sparsity and amplitude preservation of transverse wave interference of submarine cable land inspection and requirements of a 3D acquisition system.

Description

technical field [0001] The invention relates to a noise attenuation method, in particular to a method for attenuating noise of submarine cable land survey based on 3D amplitude-preserving sparse τ-p transformation. Background technique [0002] With the rapid development of the economy and the major adjustment of the international energy development strategy, the difficulty of onshore exploration has increased and the available resources have decreased. People have gradually shifted their exploration targets to offshore oil and gas exploration. Offshore oil and gas resources are abundant. Only my country's South China Sea oil reserves are at least 23 billion to 30 billion tons, accounting for about one-third of China's total resources. The technology of exploration and development of offshore oil and gas fields has developed rapidly in countries all over the world in recent decades. After the offshore oilfield enters the development period, due to obstacles such as offshore...

AI Technical Summary

Problems solved by technology

[0005] In summary, the current research on the noise attenuation of submarine cable ground survey based on 3D high-order high-resolution τ-p transform has the following problems: 1. The low signal-to-noise ratio of land survey data affects the combination effect of double survey data

2. The 2Dτ-p transformation cannot achieve satisfactory results for the data of the 3D acquisition system

3. The traditional 3Dτ-p transform cannot describe the amplitude and phase changes very well, and it cannot recover the data with amplitude changes very well.

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