The checkshots were processed from windowed real-time waveforms
transmitted uphole by mud pulse telemetry, and real-time depth updates were
calculated while drilling. A real-time corridor stack processed from the
waveforms showed seismic position, and geostopping decisions were guided by
depth projections to the key formation, which were extrapolated from look-ahead
(reflectivity) information.
Save time and expense
Use of the seismicVISION service enabled the operator to geostop the
wellbore less than 10 m from the top of the overpressured formation. This
accurate casing point selection allowed successful construction of the well to
TDwithout the time and expense of contingency strings.