Gas based testing method for pore volume compressibility of low-permeability rock
US12092558B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2024 |
| Grant date | Sep 17, 2024 |
| Priority date | — |
| Expiry date | May 30, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a gas based testing method for a pore volume compressibility of a low-permeability rock. The method comprises the following steps: obtaining a compressibility and an isothermal adsorption-desorption curve of experimental gas under a reservoir condition; performing a physical simulation experiment by using a steel core drilled with a through hole, and obtaining a gas volume collected due to the deformation of an experimental instrument; then repeating the experiment by using an actual core with the same size, and obtaining pore volumes of the reservoir core under the experimental conditions by deducting deformation of the instrument; and finally, obtaining a pore compressibility of the reservoir core under different reservoir conditions according to the pore volumes of the reservoir core under different reservoir conditions. The present invention considers gas adsorption, corrects errors caused by deformation of a physical simulation device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.