초록 ▼

The invention pertains to transmission to a remote station, by means of transmission channels (generally radio transmission channels), of seismic data acquired by a data collection equipment comprising a plurality of acquisition units, each being suited to acquire, to store and preferably to compres

The invention pertains to transmission to a remote station, by means of transmission channels (generally radio transmission channels), of seismic data acquired by a data collection equipment comprising a plurality of acquisition units, each being suited to acquire, to store and preferably to compress the data to be transmitted. The invention comprises ordered storage, in a high-capacity memory (flash type memory for example) of each acquisition unit (Ai), of data obtained during successive emission-reception cycles (acquired and possibly preprocessed seismic data) so as to form a stream of stored data to be transmitted, and progressive transfer of the stored data stream from each acquisition unit to the remote station by means of the transmission channel, by reading each storage memory, with a time lag in relation to the time of their storage depending on the transmission rate of each transmission channel and on the transmission mode selected with preferably, if sending of the data of a cycle is delayed, sending of at least partial data, compressed or not, for quality control purposes. The data transmitted are reconstituted at the remote station. The method can be used for large-scale seismic data transmission.

대표청구항 ▼

[ What is claimed is:] [1.] A method of transmission of seismic data to a remote station obtained during successive emission-reception cycles of seismic sessions in which during each emission reception cycle an emission of elastic waves is produced which are reflected by an underground formation in

[ What is claimed is:] [1.] A method of transmission of seismic data to a remote station obtained during successive emission-reception cycles of seismic sessions in which during each emission reception cycle an emission of elastic waves is produced which are reflected by an underground formation in response to the emission of elastic waves and are received with a plurality of receivers, seismic data representing the received reflected waves is acquired with data collection equipment including a plurality of data acquisition units each including a storage memory for storing the seismic data with the stored seismic data being transmitted by transmission channels to the remote station during time windows distributed over the successive emission-reception cycles with time required for transmission of the seismic data stored in each data acquisition unit during at least part of each session using available transmission channels which are insufficient to complete transmission of the seismic data stored in each data acquisition unit within a duration of a transmission window allocated to each of the data acquisition units, the method comprising:accumulating in order in the storage memory of the acquisition units seismic data from the successive emission-reception cycles so as to form the stored seismic data to be transmitted by the transmission channels; anddiscontinuously transmitting the stored seismic data to the remote unit by reading the accumulated seismic data in the storage memories and distributing the read accumulated seismic data over the successive transmission windows to lessen variation in seismic data flow during the transmission of the stored seismic data to the remote station.