Marine electric spark source multi-frequency hybrid three-dimensional excitation simulation device and method

Abstract

The invention discloses a marine electric spark source multi-frequency hybrid three-dimensional excitation simulation device and method. The device comprises a PC control host, and the PC control hostis respectively connected with an energy low-frequency electric spark seismic source box, an energy high-frequency electric spark seismic source box and a differential GPS through coaxial cables, theenergy low-frequency electric spark seismic source box is sequentially connected with a first compass bird and a first electrode through a direct-current cable; the energy high-frequency electric spark seismic source box is sequentially connected with a second compass bird and a second electrode through a direct-current cable; and the first compass bird and the second compass bird are connected with the compass bird control host through communication cables. The electric spark seismic sources with the two frequency characteristics are excited to obtain seismic signals with rich frequency components, and high-resolution seismic exploration of the seabed and the shallow, middle and deep positions below the seabed is realized.

Description

technical field [0001] The invention belongs to the technical field of geophysical exploration, and in particular relates to a multi-frequency mixed three-dimensional excitation simulation device and method for a marine electric spark source. Background technique [0002] The source excitation signal design of marine seismic exploration is one of the key steps in marine seismic exploration. The excitation energy and frequency of the seismic source directly determine the depth and resolution of the target object that can be detected in seismic exploration: the source energy of the high-energy EDM can be as high as 30,000 joules, and the excitation signal is rich in low frequency, which is mostly used for the detection of middle and deep target layers; the source energy of the small-energy EDM It can be as low as tens of joules, and the excitation signal is rich in high frequency, which is mostly used for shallow target layer detection. At present, domestic and foreign EDM so...

AI Technical Summary

Problems solved by technology

At present, the techniques for suppressing ghost reflections at the acquisition end mainly include upper and lower cable acquisition technology, inclined cable acquisition technology, etc. These technologies can effectively suppress the ghost reflection at the receiver point end, but there is no effective suppression of the source end ghost reflection at the acquisition end. related technology

Images