Schlumberger

Case Study: MWD Service Drills Record High-Temperature Well in Italy

SlimPulse provides real-time, continuous measurements in extreme bottomhole temperatures of 180 degC

Challenge: Acquire real-time, continuous measurements of gamma ray, bit inclination, and bit direction under extreme bottomhole conditions.

Solution: Use SlimPulse HT retrievable MWD service to acquire data for geosteering the Villafortuna 1 well into the target pay zone.

Result: SlimPulse HT MWD technology drilled the world’s deepest producing horizontal oil well in temperatures above 180 degC [356 degF]. The vertical depth of 6,062 m [19,888 ft] was a new world record for a completed horizontal well.

HPHT environment presents challenge in horizontal drilling

High temperature and high pressure are two of the challenges in deep horizontal wells, and operating in these environments often limits the effectiveness and life of MWD tools.

Schlumberger meets these challenges with SlimPulse HT retrievable MWD system, which provides real-time direction, inclination, toolface, and gamma ray measurements to improve drilling decisions on the rig. The SlimPulse tool can be fully retrieved while the drillstring is downhole, saving time by eliminating pipe trips for directional equipment. The tool operates in flow rates from as low as 35 galUS/min on coiled tubing to as high as 1,200 galUS/min in large diameter holes.

Deepest producing horizontal oil well drilled in extreme conditions

SlimPulse HT MWD technology drilled the world’s deepest producing horizontal oil well in the Villafortuna- Trecate field in Italy. The final bit run reached a total depth of 6,421 m [21,066 ft] at an angle of 89.6°. The horizontal drain extended 184 m with inclinations from 85° to 90°. The vertical depth of 6,062 m [19,888 ft] is a new world record for a completed horizontal well. The SlimPulse system provided real-time, continuous measurements of gamma ray, bit inclination, and bit direction under extreme bottomhole conditions to 180 degC [356 degF]. SlimPulse service was instrumental in successfully geosteering the Villafortuna 1 well into the target pay zone.


Download: MWD Service Drills Record High-Temperature Well in Italy (0.78 MB PDF)

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