Early Bed Boundary Detection While Drilling - Testing and Application of a Bit Resistivity Device

Early detection of a change in formation is often key to making safe and efficient decisions while drilling. Where sudden<br>changes in pore pressure or wellbore stability relating to lithology are expected, reducing bottomhole assembly (BHA)<br>penetration into these zones allows either changes to mud parameters or casing seat selection to be made with reduced risk.<br>Where reservoirs are intercepted, early reservoir detection offers the chance to maximize the productive interval by placing<br>the casing the top of the reservoir, which is often most important for production. It also allows to perform conventional<br>coring instead of bypass coring or to change the mud system to avoid damge of the reservoir.