Eccentricity correction algorithm for borehole shape and tool location computations from caliper data
US10954780B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2018 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | Aug 14, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/09
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The subject disclosure provides for a method of eccentricity correction of a borehole shape computation. The method includes deploying a caliper tool into a borehole penetrating a subterranean formation and acquiring field measurements with the deployed caliper tool. The method includes applying, in a processor circuit, an eccentricity correction algorithm to one or more standoff samples from the obtained field measurements, wherein the eccentricity correction algorithm produces a shape fitted curve that represents a measured borehole with a least number of points outside of the shape fitted curve and a least amount of error. The method includes determining eccentricity-corrected borehole coordinates with the applied eccentricity correction algorithm and determining a borehole shape from the eccentricity-corrected borehole coordinates. The method includes determining tool location coordinates relative to the borehole with the determined borehole shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.