|
|
Technical Paper: Drilling Optimization Using Drill-bit Seismic in the Deepwater Gulf of Mexico
Paper 59222
Abstract
Drill Bit Seismic has been used successfully on land and in shallow marine environments for many years. The technique utilizes the acoustic energy radiated during the drilling process to provide vital information about the drilling operation. It provides time-depth and formation velocity information at the well site, allowing the position of the bit to be plotted on the surface seismic section as drilling progresses. By generating look ahead VSP images, the approach to critical horizons such as casing points or overpressure zones, can also be monitored, leading to significant cost savings and enhanced safety.
The technique has recently been extended to water depths of almost 4000ft in the Gulf of Mexico, where time-depth data was obtained down to a depth of 12500ft, drilling in soft formations with a rollercone bit. This information can be used to calibrate pre-drill velocity models and helps to prevent unexpected occurrences during drilling.
This page contains additional information that requires a premium content account to view. Sign in to view the rest.
|
|
|
