Analysis of radar ranging data from a down hole radar ranging tool for determining width, height, and length of a subterranean fracture
US8096355B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2009 |
| Grant date | Jan 17, 2012 |
| Priority date | — |
| Expiry date | Apr 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/88
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Radar ranging data are collected from a down hole tool at various depths in a fractured well bore, and analyzed to provide a profile of the length of each wing of the fracture as a function of depth. The height of the fracture is determined from the vertical positions where the fracture is just observed or no longer observed as the tool is raised or lowered. For consecutive depths along the fracture (and for selected elevations from each depth for the case of a switchable antenna beam), reflection intensity as a function of range is measured. Simulated radar data are computed from a fracture model having the height of the fracture begin measured. The fracture model is varied and the resulting simulated data are correlated with the survey data until a match of minimal error is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.