Full Tensor Micro-Impedance Imaging

摘要

Various systems and methods for implementing and using a full tensor micro-impedance downhole imaging tool that includes downhole emitters that induce, at azimuthally-spaced positions on a borehole wall, fields having components in three different non-coplanar directions within a formation and directionally sensitive downhole sensors that sense the components caused by each emitter. The tool further includes a downhole controller that processes signals received from the directionally sensitive downhole sensors to provide a set of measurements representative of a 3×3 impedance tensor at each position.

主权项

1. A downhole imaging tool that comprises:
one or more downhole emitters that induce, at azimuthally-spaced positions, a plurality of fields having components in non-coplanar directions within a formation; one or more directionally sensitive downhole sensors that sense the components caused by each emitter; and a downhole controller that processes signals received from the one or more directionally sensitive downhole sensors to provide a plurality of measurement sets, wherein each measurement set is representative of an impedance tensor greater than 2×2 at each of said azimuthally spaced positions.