Proposed design for a new borehole elastic imaging tool

Robert R. Stewart, Carlos E. Nieto

This paper proposes a new borehole televiewer device that uses short-spaced, multioffset receivers to measure an angle-versus-offset (AVO) response of the borehole wall. Using various values for the borehole fluid and elastic formation, we find significant response at critical angle and measurable AVO variation. We propose a simple tool design to capture this information. With the critical angle of the reflectivity as well as the AVO response, we could calculate the formation P- and S- velocities.