Stress Effects of Core Samples - Do They Aid in Time-Lapse Seismic?

B-36 STRESS EFFECTS OF CORE SAMPLES; DO THEY AID IN TIME-LAPSE SEISMIC? Abstract 1 Performing laboratory measurements on core samples is the usual method to obtain stress dependency of a formation’s framework velocities. More than 150 core sample measurements from eight fields in the Norwegian sector illustrate that there is a large spread in the stress dependency of velocities. This is attributed to micro-structural differences between the samples such as cementation and texture in addition to possible core damage. Introduction In time-lapse (4D) seismic studies several velocity controlling mechanisms must be evaluated in order to estimate the changes in seismic