Method of determining in-situ pore pressure in chemically active formations
US11828169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2020 |
| Grant date | Nov 28, 2023 |
| Priority date | — |
| Expiry date | Mar 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F30/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods for determining an in-situ pore pressure in a formation rock may include acquiring well log data, calculating a cation-exchange capacity, calculating a mole fraction of fixed charges using the cation-exchange capacity, determining a formation temperature, calculating the in-situ pore pressure, outputting the in-situ pore pressure of the formation rock, and using the in-situ pore pressure in a wellbore stability model to monitor and maintain stability of the formation rock. Corresponding electronic devices may include a computer processor coupled to at least one logging tool, wherein the logging tool is configured to acquire well log data in a formation rock. Non-transitory computer storage mediums may include program instructions, that when executed, may be configured to perform the methods for determining an in-situ pore pressure in a formation rock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.