4D Time Strain and the Seismic Signature of Geomechanical Compaction at Genesis

A027 4D Time Strain and the Seismic Signature of Geomechanical Compaction at Genesis J.E. Rickett* (Chevron) L. Duranti (Chevron) T. Hudson (Chevron) B. Regel (Chevron) & N. Hodgson (Heriot-Watt University) SUMMARY The unconsolidated reservoirs of the Genesis field have experienced significant production-related compaction since first oil in 1999. This compaction causes stretching in the overburden and is visible as time-shifts between the monitor and baseline 4D surveys. We measured local time-shifts between these two surveys at every point in the volume and took their vertical derivative to produce an interval estimate of the fractional change in traveltime which we call