Multi-component induction logging systems and methods using real-time OBM borehole correction
US10330818B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2011 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Mar 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various resistivity logging tools, systems, and methods are disclosed. At least some system embodiments include a logging tool and at least one processor. The logging tool provides transmitter-receiver coupling measurements that include at least direct coupling along the longitudinal tool axis (Czz), direct coupling along the perpendicular axis (Cxx or Cyy), and cross coupling along the longitudinal and perpendicular axes (Cxz, Cyz, Czx, or Czy). The processor combines a plurality of the coupling measurements to obtain inversion parameters. Based at least in part on the inversion parameter, the processor performs an inversion process to determine a vertical conductivity and, based in part on the vertical conductivity, determines borehole corrected values for said transmitter-receiver coupling measurements. One or more of the borehole corrected values can be provided as a function of borehole position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.