Spin echo SPI methods for quantitative analysis of fluids in porous media
US9018950B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 8, 2009 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Jun 1, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N24/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring a parameter in a sample by imaging at least a portion of the sample using a spin-echo single-point imaging (SE-SPI) pulse sequence. This method involves applying a pure phase encoding to the SE-SPI pulse sequence, acquiring a multiplicity of echoes, and determining the spatially resolved T2 distribution. In another embodiment, individual echoes are separately phase encoded in a multi-echo acquisition and the SE-SPI pulse sequence is a hybrid SE-SPI sequence. In another embodiment, an external force can be used to build up a distribution of saturations in the sample, and a T2 distribution can be measured for the sample, which is then used to determine a parameter of the sample. A spatially resolved T2 distribution can also be measured and a resulting spatially resolved T2 distribution used to determine the T2 distribution as a function of capillary pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.