Real-time seismic checkshots reduce exploration drilling risk

摘要

The key technology enabler for seismic-while-drilling is lhe use of a ruggedized ultra-high precision clock in the downhole tool thai can maintain millisecond accuracy oí global positioning system (GPS) time over periods of several days. This accuracy is essenlial. because while downhole in lhe bollomhole assembly (BHA), lhe seismic tool carrying the acoustic sensors has no direct physical access to times from the GPS satellites used to control the seismic source at the sui lace.