Iterative borehole correction
US11473422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2019 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Aug 14, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/9017
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Raw signal measurements can be received by sensors in a wellbore. Borehole effects can affect the raw signal measurements. The raw signal measurements can be converted into ratio signals having attenuation and phase shift. An apparent resistivity can be determined from the ratio signals. Mud resistivity can be determined based on apparent resistivity, at least part of the raw signal measurements, and the borehole size. A true resistivity can be determined based on the mud resistivity and at least part of the ratio signals. The raw signal measurements and the ratio signals can be updated based on the true resistivity. Steps can be repeated to determine a corrected true resistivity. Based on the true resistivity value and updated raw signal measurements and ratio signals, an operating characteristic of a well tool can be caused to be adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.