Testing device and evaluation method for sensitivity damage of core permeability tensor
US11604132B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2022 |
| Grant date | Mar 14, 2023 |
| Priority date | — |
| Expiry date | Jun 10, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a testing device and evaluation method for sensitivity damage of core permeability tensor, comprising the following steps: first, obtain the cubic experimental rock samples and calculate the formation pressure distribution based on the reservoir geological data; then simulate the true stress and strain state of core in formation through triaxial stress loading, design the acid liquor, alkali liquor, inorganic salt solution, formation water and different displacement rates for displacement experiments, realize the determination of core three-directional permeability tensor under the same experimental conditions through three-directional sequential displacement, process the experimental data through Darcy's law, and calculate the damage degree of core permeability tensor under different sensitivity conditions of triaxial stress state; finally, identify the real-time flow state of fluid through permeability tensor synthesis, and realize the accurate and efficient testing and evaluation on permeability tensor sensitivity of reservoirs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.