MULTI -AXIAL INDUCTION BOREHOLE IMAGER

摘要

Various systems and methods are disclosed for implementing and using a multi-axial induction borehole imaging tool that includes emitters that induce, at azimuthally-spaced positions on a borehole wall, a plurality of fields having components in three non-coplanar directions within a formation. The tool also includes directionally sensitive inductive sensors that sense the components caused by each of the one or more inductive emitters, and a downhole controller that processes signals received from the directionally sensitive inductive sensors to provide a set of measurements representative of an impedance tensor at each position.

主权项

1. A multi-axial induction borehole imaging tool that comprises:
one or more inductive emitters that induce, at azimuthally-spaced positions on a borehole wall, a plurality of fields having components in three non-coplanar directions within a formation; one or more directionally sensitive inductive sensors that sense the components caused by each of the one or more inductive emitters; and a downhole controller that processes signals received from the one or more directionally sensitive inductive sensors to provide a plurality of measurement sets, wherein each measurement set is representative of an impedance tensor at each of said azimuthally-spaced positions on the borehole wall.