Since the dawn of logging-while-drilling (LWD) in the 1980s, the industry has wanted a reliable while-drilling borehole seismic measurement. However, a number of technical roadblocks prohibited its realization until recently. These difficulties included the nature and required accuracy of the measurement, timing issues, sensors, automation, and the lack of an electrical connection between the downhole tools and the surface in a while-drilling configuration.

Technological solutions to these roadblocks have since been found, and today seismic MWD (seismic measurement-while-drilling) tools acquire and transmit seismic data in real time during the drilling process, without interfering with normal rig operations and without loss...

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