Depth measurement for sound impulse emitter by utilization of seismic spread

Abstract

The invention discloses a method for measuring water depth across the seismic array, comprising: emitting signals via an acoustic pulse emitter in seismic array; measuring the arrival time of the signal bottom reflected to a receiver in a seismic geophone; measuring the time of the signal directly reaching the receiver; and determining water depth according to the measured arrival time of the signals.

Description

technical field

[0001] The present invention relates generally to marine seismic surveys, and more particularly to systems and methods for producing bathymetry across a seismic spread by using components of a seismic spread. Background technique

[0002] In marine seismic surveying, it is desirable to have accurate information about the water depth across the seismic array. This depth information is important to avoid adding bottom reflections in positioning solutions and to remove waterborne multiples in seismic data processing. To date, water depths have generally been taken along seismic survey tracks using echo sounders mounted on the hull of a vessel. The depth information obtained in this way is of little value because it only characterizes a limited area and does not cover the seismic array. Multiple round trips with a survey vessel using multiple echosounders or side-scan sonars can obtain more precise depth information for chart generation. This method of obtaini...

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