Interpretation methods for NMR diffusion-T2 maps
US7388374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2006 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Jan 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for interpretation of multi-dimensional nuclear magnetic resonance data taken on a sample of an earth formation. Specifically, a set of NMR data is acquired for a fluid sample located either in a borehole or in a laboratory environment. From the set of NMR data, a multi-dimensional distribution is calculated using a mathematical inversion that is independent of prior knowledge of fluid sample properties. The multi-dimensional distribution is graphically displayed on a multi-dimensional map. Each fluid instance or artifact visible on the graph is identified as representing a probable existence of a detected fluid. One or more quantitative formation evaluation answers for one or more fluid instances is computed based on the multi-dimensional distribution associated with the respective fluid instance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.