Carbonate permeability
US6959246B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2003 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Apr 6, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/0893
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A modification to the Coates-Timur relationship to produce a more coherent relationship applicable to carbonate formations is disclosed. In this method, permeability may be determined using porosity and the ratio of bound fluid volume to (1—bound fluid volume). This method also allows for improved estimation of irreducible water saturation of a carbonate formation using the ratio of kc and (eφf+kc). Likewise, the bound fluid volume of a carbonate formation may be determined using the ratio of φkc and (eφf+kc). In these relationships, e, x, and f are constants according to the following relationships e=xc, f=bc+1, x is between 1 and 100 mD (preferably 10 mD).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.