| abstract |
System designed for acquisition of seismic data by means of acquisition stations set on the bottom of a water mass. n The system comprises bottom acquisition stations (DSAU) combining a streamlined boom suited to stick into the bottom and thus to couple several seismic receivers with the underlying formation, and a scaled body for electronic data acquisition and communication modules. These acquisition stations (DSAU) are put into water and go down to the bottom under the effect of gravity. Several relay buoys (RCB) are positioned at the surface, each with a GPS positioning module, a radio link with a central station (CCRU), on a ship for example, and modules intended for acoustic communication with bottom acquisition stations (DSAU), used both to determine the position of these stations in relation to the relay buoys and to exchange control data and seismic data (good running order data or possibly seismic traces acquired if the conditions lend themselves thereto). n Application: seismic prospecting or monitoring of an underground formation. |