Estimation of fluid saturation of a formation from integration of multiple well logs
US12291963B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2020 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Aug 16, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/66
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and systems are provided characterizing a formation traversed by a wellbore, wherein the formation includes at least a flushed zone and an uninvaded zone, which involve obtaining well log data based on plurality of different well log measurements of the formation at multiple depths in the wellbore. The well log data is used by a computational model that solves for a set of petrophysical parameters that characterize a portion of the formation corresponding to the multiple depths in the wellbore, wherein the set of petrophysical parameters include a cementation exponent, a saturation exponent, and a flushed zone water resistivity. The solved-for set of petrophysical parameters can be used to determine a value of water saturation of the uninvaded zone for the portion of the formation corresponding to the multiple depths in the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.