Method for determining formation properties by inversion of multisensor wellbore logging data
US10365405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2016 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jan 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/622
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A computer-implemented method is provided for determining properties of a formation traversed by a well or wellbore. A formation model describing formation properties at an interval-of-interest within the well or wellbore is derived from measured sonic data, resistivity data, and density data for the interval-of-interest. The formation model is used as input to a plurality of petrophysical transforms and corresponding tool response simulators that derive simulated sonic data, resistivity data, and density data for the interval-of-interest. The measured sonic data, resistivity data, and density data for the interval-of-interest and the simulated sonic data, resistivity data, and density data for the interval-of-interest are used by an inversion process to refine the formation model and determine properties of the formation at the interval-of-interest. In embodiments, properties of the formation may be radial profiles for porosity, water saturation, gas or oil saturation, or pore aspect ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.