초록 ▼

Method for determining the geometry of a seismic wave emission device comprising a plurality of seismic sources (S11, S12, S21, etc.) toward by a ship (1) with different transverse and longitudinal offsets. It comprises the isolated triggering of each of the sources (S11, S12, S21, etc.), the detect

Method for determining the geometry of a seismic wave emission device comprising a plurality of seismic sources (S11, S12, S21, etc.) toward by a ship (1) with different transverse and longitudinal offsets. It comprises the isolated triggering of each of the sources (S11, S12, S21, etc.), the detection of acoustic waves coming therefrom by means of proximity sensors (C) arranged at known distances from other sources and optionally from the ship or from a seismic flute, and the recording of detecting signals by means of an acquisition system on board the ship (1). After various corrections of the distances and various processings performed on the signals, parameters (propagation time, phase shiftings) representative of intersource distances are determined and, consequently, the relative coordinates of the sources with respect to each other and their positions with respect to other points. The previous measurements are completed by other measurements related to the immersion depth of different sources. Application to ocean seismic prospection.

대표청구항 ▼

A method for determining a geometrical configuration in water of a seismic wave emission source array comprising a plurality of seismic sources towed in immersion by a ship and distant from one another, with each source having in close proximity thereto and associated therewith a proximity pick-up s

A method for determining a geometrical configuration in water of a seismic wave emission source array comprising a plurality of seismic sources towed in immersion by a ship and distant from one another, with each source having in close proximity thereto and associated therewith a proximity pick-up sensor for acoustic waves, said method comprising the steps of: triggering a first one of said plurality of seismic sources for generating a seismic signal; detecting said generated seismic signal after propagation through water by means of said proximity pick-up sensors associated with others of said seismic sources; measuring parameters of said detected acoustic signal representative of distance between said triggered seismic source and said proximity pick-up sensors respectively; repeating the three previous steps successively for others of said seismic sources of the array; and determining the relative positions of the different seismic sources of said array with respect to one another by multiple acoustic triangulations using a combination of said parameters representative of distances.