Wettability determination of rock samples
US10895543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2019 |
| Grant date | Jan 19, 2021 |
| Priority date | — |
| Expiry date | Jun 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/448
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A primary drainage process, a core aging process, a water flooding process, an enhanced oil recovery (EOR) flooding process, and a core cleaning process is conducted on a rock sample. For each of the primary drainage process, core aging process, water flooding process, EOR flooding process, and core cleaning process, an equilibrium sample magnetization distribution and a spatially resolved spin-spin relaxation time spectrum are measured across multiple locations along a longitudinal length of the rock sample. One or more hydrocarbon saturation distributions of the rock sample are determined based on the equilibrium sample magnetization distributions. One or more wettability distributions of the rock sample are determined based on the spatially resolved spin-spin relaxation time spectrums and the one or more hydrocarbon saturation distributions. One or more wettability modification factor distributions of the rock sample are determined based on the spatially resolved spin-spin relaxation time spectrums and the hydrocarbon saturation distribution(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.