Patent ID: 11899151
Assignee: PGS GEOPHYSICAL AS
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method, comprising:
accessing, by a computing system, seismic data recorded using a plurality of seismic sensors during a transition survey, wherein the seismic data was recorded based on signals reflected from one or more geological structures in response to generating seismic signals using a first type of seismic source while also generating seismic signals using a second, different type of seismic source; and
adjusting, by the computing system based on the accessed seismic data from the transition survey, sensor signals from at least one of a prior seismic survey that used the first type of seismic source or a subsequent seismic survey that used the second type of seismic source, wherein the adjusting calibrates one of the prior and the subsequent surveys with the other;
wherein the transition survey comprised a 4D seismic survey relative to at least one of the prior seismic survey and the subsequent seismic survey, such that both the transition survey and the at least one survey employed seismic sensors spaced apart in an inline direction and in a crossline direction, and such that an elapsed time between the transition survey and the at least one survey was sufficiently long to allow detectable changes to occur in the geological structures between a time of the transition survey and a time of the at least one survey.