Abstract
We present a modeling study to investigate the ability of directional induction logging to evaluate magnetic properties of formations. Simultaneous measurement of in-phase and quadrature components of electromotive force, or R- and X-signals, respectively, gives complete information about both the electrical resistivity and the magnetic susceptibility of the formation. We describe an approach for designing a directional induction tool with tilted transmitting and receiving coils. We discuss spatial resolution using directional excitation-measurement and evaluation of formation parameters. The proposed method can detect magnetic susceptibility inhomogeneity in addition to electrical resistivity inhomogeneity using the X-signal. The X-signal log response reflects abrupt changes in magnetic properties, with sharp gradients located in the vicinity of magnetic susceptibility interfaces.
| Original language | English |
|---|---|
| Pages (from-to) | 427-437 |
| Number of pages | 11 |
| Journal | Geophysics |
| Volume | 67 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2002 |
| Externally published | Yes |
ASJC Scopus subject areas
- Geochemistry and Petrology