Apparatus and method for wellbore imaging in oil-based mud
US11163086B2 · kind B2 · utility
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Key dates
| Filing date | Jan 10, 2018 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Apr 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2823
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An oil-based mud wellbore imaging apparatus for measuring formation permittivity and resistivity includes a reflectometry-type microwave scanning system. The system contains at least one high-Q microstrip resonator with one or more slots on the top surface. The microstrip resonator is excited by one port, which is fed with electromagnetic signals by a coaxial cable. From the phase detection of signal at the port, the formation resistivity and permittivity can be determined and corresponding borehole images can be generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.