Fracture detection using Borehole Acoustic Reflection Survey data

A method to determine the strike of interface outside of borehole by monopole borehole acoustic reflections

“…Schlumberger developed their first acoustic reflection tool (BARS: Borehole Acoustic Reflection Survey) in 1998, and released a new tool (Sonic Scanner) in 2005. Published papers and reports show the tool can detect the structure around the borehole to a distance of 20 m in 3 dimensions (Pistre et al, 2005, Hirabayashi et al, 2010. However, the details of data processing methods and software are still not clear to the industry.…”

“…Although acoustic reflection imaging tools are available for nearly a decade (Esmersoy et al, 1998;Tang, 2004;Pistre et al, 2005;Hirabayashi et al, 2010), some problems still exist. The most difficult one is to extract the very weak reflection from the dominant borehole-guided signal trains.…”

High‐resolution Radon transforms for improved dipole acoustic imaging

“…This imaging capability presents possibilities for this method in heterogeneous reservoir evaluation. Because the depth of investigation and the resolution of this method are between those offered by the conventional acoustic logging and vertical seismic profile (VSP) methods, this area has become an important research topic in acoustic logging (Esmersoy et al 1998;Patterson, Tang, and Ratigan 2008;Hirabayashi, * E-mail: yuejack1@sina.com Leaney, and Haldorsen 2008; Hirabayashi et al 2010;Li et al 2002;Zheng and Tang 2005).…”

“…; Patterson, Tang, and Ratigan ; Hirabayashi, Leaney, and Haldorsen ; Hirabayashi et al . ; Li et al . ; Zheng and Tang ).…”