Publications Details
Comparison of in situ stress information from core and log analyses
Horizontal stress directions (azimuths) determined from anelastic strain recovery (ASR) and differential strain curve analyses (DSCA) were compared with those from wellbore breakouts detected by borehole televiewer and oriented caliper logs. The ASR/DSCA techniques appear to be more sensitive then the log techniques and provided stress azimuth predictions at depth intervals where the log data did not. Stress azimuth determinations were also made from other core analyses techniques, which, like ASR/DSCA, are associated with the formation of stress release microcracks. Preliminary insights were obtained in the applicability of these other techniques. This work provides information on the stresses at two well sites 3.6 miles apart in Western Colorado; and showing the comparative data in this context provides information on how to apply these techniques and provides an understanding of the apparent influence of geologic effects (topography, depositional environment) on the stresses. 28 refs., 10 figs., 3 tabs.