METHOD OF MARINE TIME-LAPSE SEISMIC SURVEYING

摘要

A method of marine time-lapse seismic surveying of a subsurface formation,comprises providing a baseline survey,providing a monitor survey that includes information about changes in thesubsurface relative to the baseline survey, recordinga repeat survey so closely in time to one of either the baseline survey or themonitor survey that changes in the subsurface canbe ignored but under different near-surface conditions from said one survey,computing a short-time survey difference between therepeat signals and signals comprising said one of either the baseline surveyor the monitor survey, computing a monitor surveydifference, matching the short-time survey difference and the monitor surveydifference to derive a matched noise survey difference,subtracting the matched noise survey difference from the monitor surveydifference, and outputting a noise suppressed surveydifference based on the result of the subtraction.