A Method for Retrieving Seabed Reflection Coefficient of Hydrophone Data

Abstract

A method for inversion of seabed reflection coefficient of hydrophone data is characterized in that it comprises the following steps: exciting and collecting seismic data of hydrophone and land geophone with seismic artificial source and performing preprocessing; calculating the data of hydrophone and land geophone Data Fourier transform; calculate the upgoing wave field and the first-order and second-order delay data of the upgoing wave field; calculate the up-going wave field and the first-order and second-order delay time series data of the upgoing wave field; calculate the coefficient of the characteristic equation of the seabed reflection coefficient; construct and solve the seabed Reflection coefficient characteristic equation; calculate upgoing wave data energy; determine optimal seabed reflection coefficient; draw seabed reflection coefficient profile and store seabed reflection coefficient in seismic data track head; the invention realizes the merge processing of underwater geophone data and land geophone data , Eliminate the interference of seawater multiple wave interference in seismic data, effectively improve the signal-to-noise ratio and resolution of seismic data, and have a certain anti-noise ability.

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, submarine cable) is a combined offshore and land seismic data acquisition technology. The geophone is fixed on the seabed to obtain high-resolution three-dimensional seismic data. It uses a fixed arrangement with geophones fixed on the sea floor to receive seismic waves, while a ship merely tows the sourc...

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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