Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1995-05-25
1997-04-22
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 13, G01V 122
Patent
active
056234554
ABSTRACT:
A seismic data acquisition system utilizing a plurality of remote units, each remote unit being coupled to a plurality of receivers placed spaced apart on the earth's surface is provided. The remote units acquire seismic data from their associated receivers in response to a seismic shock wave induced at a selected point on the earth and transmit the acquired seismic data to a recorder over a separate channel associated with each receiver. A signature device located at a known receiver location transmits a data sequence containing an embedded time-invariant code that is unique to the signature device to the recorded during the recording cycle. The signature device data sequence and its location are pre-recorded in the recorder. The recorder utilizing the stored data sequence and the data sequence transmitted by the signature device during the recording cycle to map the seismic data channels corresponding to the locations of their associated receivers. The invention for acquiring seismic data contains the steps of: (a) acquiring seismic data from a plurality of seismic sensors placed spaced apart on the earth; (b) transmitting the seismic data acquired from the seismic sensors to the recorder over a separate channel associated with each receiver; (c) transmitting a data sequence having an embedded time-invariant code from a signature device located at a sensor location; and (d) utilizing the data sequence transmitted by the signature device to map the seismic data associated with each channel corresponding to the location of its seismic sensors.
REFERENCES:
patent: 3946357 (1976-03-01), Weinstein et al.
patent: 4152691 (1979-05-01), Ward
patent: 4443713 (1984-04-01), Layton
patent: 4635235 (1987-01-01), Bearden
Lobo Ian J.
Thigpen E. Eugene
Western Atlas International Inc.
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