... al., 2010). The main objectives of a borehole acoustic reflection survey (BARS) are to image caprocks for confirmation of geosteering and well placement (Borland et al., 2007; Haldorsen et al., 2010), to observe extensions of fractures for efficient production of gas and oil (Yamamoto et al., 1999...

... a stronger collar arrival, it is not suitable for monopole P&S measurements. well logging Yamamoto real time system Formation Evaluation Symposium quadrupole shear Upstream Oil & Gas shear slowness quadrupole mode Indicator lwd sonic real-time leaky compressional evaluation...

... drilling-induced fractures. orientation Upstream Oil & Gas Yamamoto underground research program reservoir geomechanics regime basin borehole investigation investigation Reservoir Characterization 21st formation evaluation symposium japan atomic energy agency Drilling pore pressure...