Isotope nuclear magnetic method for analyzing ineffective water absorption of rock pores
US10801941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2019 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Apr 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An isotope nuclear magnetic method for analyzing ineffective water absorption of rock pores includes steps of: saturating core pores of a core sample with a wetting phase fluid of water H2O, and obtaining a core T2 spectrum after being saturated with the water; re-saturating the core pores with a wetting phase fluid of heavy water D2O, and obtaining a rock baseline T2 spectrum; injecting fluorinated oil into the core sample saturated with the heavy water; injecting the water H2O, simulating a water injection process, and injecting the fluorinated oil, so as to analyze a content of immobile water and obtain a residual T2 spectrum, wherein a range formed by a difference between the residual T2 spectrum and the rock baseline T2 spectrum is an ineffective water absorption portion of the rock pores, and an ineffective water absorption amount is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.