Inversion method of waterland detector data seabed reflection coefficient

Abstract

Disclosed is an inversion method of a waterland detector data seabed reflection coefficient. The method is characterized by comprising the following steps: exciting and acquiring water detector and land detector seismic data by use of a seismic artificial epicenter, and performing preprocessing; calculating Fourier transformation of water detector data and land detector data; calculating an upgoing wave field and upgoing wave field first-order and second-order delay data; calculating the upgoing wave field and upgoing wave field first-order and second-order delay time sequence data; calculating a seabed reflection coefficient characteristic equation coefficient; constructing and solving a seabed reflection coefficient characteristic equation; calculating upgoing wave data energy; determining an optimum seabed reflection coefficient; and drawing a seabed reflection coefficient profile and storing a seabed reflection coefficient in a seismic data channel head. According to the invention, merging processing on the water detector data and the land detector data is realized, seawater ringing multitime wave interference influences in seismic data are eliminated, the signal-to-noise ratio and the resolution of the seismic data are effectively improved, and a certain anti-noise capability is exhibited.

Description

technical field [0001] The invention relates to oil field exploration, development and mining technology, in particular to a method for inversion of seabed reflection coefficient of hydrophone data and providing high-resolution seismic graphics and data for reflecting underground formation layers and oil reservoir description. Background technique [0002] With the development of seismic exploration technology, offshore oil and gas exploration is becoming more and more difficult and deeper, and the requirements for signal-to-noise ratio and resolution of seismic data are also getting higher and higher. 3D seismic can accurately describe reservoirs. OBC (Ocean Bottom Cable) is a combined offshore and land seismic data acquisition technology, which fixes the geophone on the seabed to obtain high-resolution 3D seismic data. It uses a fixed arrangement with geophones fixed on the sea floor to receive seismic waves, while a ship merely tows the source for seismic wave excitation...

AI Technical Summary

Problems solved by technology

The above method pre-sets a range value of the seabed reflection coefficient and the scanning step size, and adopts the scanning method, so the calculation is time-consuming, and there must be errors in the calculated seabed reflection coefficient value

Moreover, the calculation accuracy is low, the calculation is time-consuming, and cannot meet the actual data processing needs.

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