System and methodology for identifying time differences between clocks during seismic exploration
AssigneeSchlumberger Technology Corporation
InventorsToru Ikegami, Shinji Yoneshima
Life of this patent
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Abstract
A technique facilitates seismic exploration by identifying time differences between clocks employed during the seismic exploration. According to an embodiment, a seismic signal is output from a source and has an incident wave and a reflected wave. The seismic signal is received by at least one receiver which outputs data to a control system. The control system is employed to compare a symmetry of the propagation of the incident wave and the reflected wave. The symmetry data is then used to determine a temporal change of the time base of the at least one receiver.
Claims20
A method for use in seismic exploration, comprising:
- using a plurality of clocks in a plurality of receivers;
- outputting a seismic signal from a source;
- receiving the signal output by the source, identifying an incident wave and a reflected wave in the received signal;
- and
- detecting differences of a time base among the plurality of clocks based on the symmetry of propagation of the incident wave and the reflected wave of the seismic signal.
A method for use in seismic exploration, comprising:
- outputting to a control system a seismic signal having an incident wave and a reflected wave, the seismic signal being received by at least one receiver;
- examining disruptions in a symmetry between the incident wave and the reflected wave;
- and
- using data obtained regarding the symmetry to determine a temporal change of the time base of a clock of the at least one receiver.
A system, comprising:
- a control system;
- a plurality of seismic receivers operatively coupled to the control system, each seismic receiver having a clock;
- and
- a seismic source operatively coupled with the control system, the seismic source outputting a signal detected by the plurality of seismic receivers, the detected signals each having an incident wave and a reflected wave, the control system being operated to process data received from the plurality of seismic receivers to detect differences of a time-base among the plurality of clocks based on the symmetry of propagation of the incident wave and the reflected wave.
Dependencies are inferred from the claim text.