Real Time Deep Electrical Images, a Highly Visual Guide for Proactive Geosteering

For ideal well placement it is now possible to guide real time decisions with deep electrical images of<br>the surrounding geology. New azimuthal deep resistivity LWD sensors show images of approaching<br>boundaries long before they cross the well path. Clearly the earlier an approaching boundary is<br>detected and mapped in space, the longer the window of opportunity to change the course of the well<br>and to avoid exiting the reservoir. Because the geosteering engineer sees geological events from a<br>distance and makes decisions in advance of crossing reservoir boundaries, the geosteering operation is<br>said to be “proactive”.