Seismic recording offsets have historically been restricted for the following reasons: expense, operation difticulty, and the good use of longer offsets is technically more difficult. For current ocean bottom acquisition technology the rost and operational difficulty of acquiring Jonger offsets quickly becomes prohibitive but in the case of conventional marine streamer and onshore acquisition these issues are relatively trivial leaving only the extra technical difficulty as an obstacle. While the longer offsets do present a challenge to the seismic processor, the information gained in unraveling their kinematic and amplitude behaviour provides us with the opportunity to team much more about the subsurface than just the usual structural image.


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