Challenge: Drill S-shaped well to hit three targets with one run in high temperatures.
Solution: Use BHA incorporating PowerDrive X6 HT rotary steerable system with TeleScope HT high-speed telemetry-while-drilling and arcVISION HT array resistivity compensated service, which acquires APWD annular pressure while drilling.
Result: Achieved all drilling and logging objectives despite maximum circulating temperatures of 155 degC [311 degF] and static temperatures exceeding 182 degC [360 degF].
An operator in Malaysia planned to drill two high-temperature (HT) wells in a region in which
previous HT wells had been drilled vertically using pendulum assemblies. One of the planned
wells had a challenging S-shape that was intended to hit three targets in a single run. Given the
tight target tolerance, any failure would make achieving the drilling objective impossible.
Despite high downhole temperatures, the operator achieved his objective and hit all three targets
in one run with a BHA that included PowerDrive X6 HT rotary steerable system, TeleScope HT
high-speed telemetry-while-drilling service, and an arcVISION HT array resistivity compensated
service. The TeleScope HT and arcVISION HT services provided direction and inclination,
gamma ray, resistivity, and APWD annular pressure-while-drilling data, both in real-time and
recorded modes. OSC operation support engineers, certified in high-temperature operations,
monitored fingerprinting and staging operations to help optimize drilling performance and
maintain tool temperature as long and low as possible.
Static well temperature for the
entire 70 h of drilling was more
than 182 degC [360 degF], and the
circulating temperature peaked at
155 degC [311 degF]. Despite those
high temperatures, the well was
drilled as planned and all drilling and
logging objectives were achieved.
Download: High-Temperature Malaysian S-Well Hits All Three Targets in One Run (0.70 MB PDF)