Integrating Images From Multiple Depths of Investigation and Quantitative Signal Inversion in Real Time For Accurate Well Placement

Optimal field development often entails placing the wells in prescribed locations within the reservoir. An error of a few<br>meters in height above the oil-water contact or with respect to the roof can result in millions of barrels left behind through the<br>life of the field. Driven by this key requirement, new technologies continue to emerge to help geologists, drillers, and<br>reservoir engineers geosteer the wells. In recent years, two types of LWD information have been used. Wellbore imaging on<br>one hand recognizes when a well path has left the reservoir and determines the angle of exit. On the other hand, traditional<br>axi-symmetrical resistivity logs help quantify through inversion the distance to an approaching boundary, but fail to tell its<br>azimuth.