Azimuthal, deep-reading LWD tool optimizes geosteering in North Sea well ///

Drilling through complex reservoirs can be extremely challenging, since pre-well geological models are often limited to the resolution of seismic data. Even with nearby offset wells against which to correlate, complex geology by definition has significant variations that cannot be fully anticipated before drilling. Advances in directional LWD resistivity measurements have compensated for these pre-well limitations through improved real-time geosteering, by providing discrete measurements and distance to the formations above, below and to the sides of the sensor while drilling horizontally or at high-inclination angles through the reservoir. The new InSite Azimuthal Deep Resistivity (ADR) sensor from Halliburton’s Sperry Drilling Services combines the functions of geosteering and formation evaluation to allow the drilling engineer and the geologist to optimize wellbore placement and reservoir production in highly deviated and horizontal boreholes, especially in complex reservoirs. This functionality was a critical factor in the recent successful placement of a horizontal well section...

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