METHODS AND APPARATUS FOR PERFORMING MOVING SEISMIC CHECKSHOTS

摘要

Methods and apparatus for creating a velocity profile of a formation surrounding a borehole by checkshot measurements while moving the tool (202) along the borehole. A conveyance and a sensor section (202, 205) are configured to move the sensor section (205) in the borehole. At least one receiver (205) is configured to detect signals generated at or near the surface while the sensor section is moving in the borehole.