Transverse wave velocity extraction method for seabed shallow deposition layer and processing terminal

Abstract

The invention relates to a transverse wave velocity extraction method for seabed shallow sedimentary layers and a processing terminal. The method comprises the following steps: step 1, generating a plurality of horizontal stratified geological models of the seabed shallow sedimentary layers; step 2, simulating each horizontal stratified geological model by adopting a seismic wave field numerical simulation method to obtain corresponding OBS data including a vertical component and a horizontal component; step 3, preprocessing the horizontal component of the OBS data, including performing time correction on the OBS data to obtain preprocessed OBS data; step 4, combining the OBS data and the transverse wave speed into label data, and inputting the label data into a neural network for training; and step 5, acquiring and preprocessing actual OBS data, inputting the actual OBS data to the neural network for processing, and multiplying an output result by a normalization factor to obtain a final transverse wave velocity. Manual intervention components are few, the calculation amount is small, and the transverse wave speed accuracy is higher.

Description

technical field [0001] The invention relates to the technical field of seabed seismic data processing, in particular to a shear wave velocity extraction method and a processing terminal for shallow seabed sediments. Background technique [0002] The shear wave velocity of shallow seabed sediments plays a very important role in ocean exploration, especially in the fields of ocean drilling and hydrate investigation in ocean engineering. At present, there are mainly the following methods for extracting shear wave velocity: (1) surface wave dispersion curve inversion; (2) sea bottom seismograph (OBS) data travel time inversion; (3) elastic wave full waveform inversion; (4) ) drilling survey. Among them, the method based on surface wave dispersion curve inversion requires the surface wave information to be recorded in the seismic data, but in the deep sea environment, it is generally difficult to collect surface wave information. When inverting shear wave velocity parameters ba...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, one of the purposes of the present invention provides a method for extracting shear wave velocity for shallow sediment layers on the seabed, which can solve the problem of extracting shear wave velocity;

[0005] The second object of the present invention is to provide a processing terminal, which can solve the problem of extracting shear wave velocity

Images