Maintain verticality to reach small target surrounded by faults
Schlumberger provided the PowerV vertical drilling system for the job to
ensure proper positioning of the well, improve hole quality, and increase
efficiency. With automatic inclination hold, the PowerV RSS could minimize
verticality, even when surrounded by highly dipped faults, and power through to
TD. Its fully rotating design meant less risk of differential sticking and
better hole cleaning.
At 9,590 ft MD while drilling at average ROP of 100 ft/h, the well
encountered stability issues attributed to the reservoir pressure of 1,200 psi.
The team controlled with issue by increasing mud weight from the planned 9.7 to
10.9 ppg. The increased drilling time it took to safely mitigate the issue
adversely impacted performance by reducing planned ROP of 27 ft/h down to 16
Landed in target with 0.15° inclination at TD
PDVSA and Schlumberger used the PowerV vertical drilling system to
successfully drill the HKF-1 vertical wellbore to TD, reaching MD 13,235 ft
with an inclination of 0.15° and a closure distance of 5.45 ft. With
minimal departure, the wellbore stayed well within the 30-ft target tolerance
despite the highly dipped faults surrounding the sand reservoir.