Land geophone and hydrophone seismic data matching method

Abstract

Disclosed is a geophone and hydrophone seismic data matching method. The land geophone and hydrophone seismic data matching method comprises collecting and preprocessing seismic data of a land geophone and a hydrophone; computing a Kaiser window Hilbert factor sequence; according to a land geophone seismic data sequence and the Kaiser window Hilbert factor sequence, computing a land geophone data Hilbert seismic channel sequence; according to the land geophone data Hilbert seismic channel sequence, computing land geophone and hydrophone data correlated sequences; according to the land geophone and hydrophone data correlated sequences, computing the characteristic coefficient of a phase matching factor characteristic equation; computing the correlated sequence of phase matching data of the hydrophone and the land geophone; according to the correlated sequence, structuring and solving an amplitude matching factor characteristic equation; according to the amplitude matching factor characteristic equation, performing data amplitude matching of the geophone.

Description

technical field [0001] The present invention relates to oil exploration, development and exploitation technology, specifically, to a method for matching seismic data of land and water geophones. 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. The technology of data acquisition using OBC (Ocean Bottom Cable) is a combined offshore and land seismic data acquisition technology. OBC uses a fixed arrangement, the geophones are fixed on the seabed to receive seismic waves, and the seismic source is towed by a ship for seismic wave excitation. In the process of OBC data acquisition, at least three ships are used: a source ship, which is used to tow the air gun source arrangement for seismic wave excitation; a receiving ship, which is fixed and connecte...

AI Technical Summary

Problems solved by technology

This method requires a lot of cross-correlation calculations and maximum energy calculations, so the calculations are very time-consuming

[0007] Under normal circumstances, the sensor sensitivity (conduction constant) values ​​of the land and water geophones are only known to the field data collectors, but the indoor processing personnel do not know the sensor sensitivity values ​​of the land and water geophones, so it is impossible to use the land and water geophones to adjust the amplitude of geophone data for

On the other hand, due to the differences in manufacturing and contact coupling with the seabed between each geophone and connecting cables, the sensor sensitivity values ​​displayed by each geophone are also different. The sensor sensitivity value in manufacturing, but the sensor sensitivity value when the real detector is received is impossible to know

Therefore, the calculation and processing of conventional amplitude matching factors are difficult to meet the needs of actual land survey seismic data processing.

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