Geo-steering using electromagnetic gap impedance data
US11719048B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2020 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Oct 1, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/087
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for steering a downhole tool includes receiving an electromagnetic (EM) signal from the downhole tool. The downhole tool is in a wellbore in a formation. The EM signal comprises a gap voltage and a gap current that are measured across a gap sub in the downhole tool. The method also includes determining a gap impedance based at least partially upon the gap voltage and the gap current. The method also includes determining a first formation resistivity at a first location in the wellbore based at least partially upon the gap impedance. The method also includes steering the downhole tool based at least partially upon the first formation resistivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.