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US 2021/0010367 A1Published application
Methods for determining a volume fraction of water and water salinity in organic shale reservoirs using multi-frequency dielectric well logging measurements
AssigneeSchlumberger Technology Corporation
InventorsNikita Seleznev, Tarek M. Habashy, Michel Claverie
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Abstract
The subject disclosure relates to a method for determining a volume fraction of water and water salinity in organic shales and other geological formations. The method includes a knowledge of complex formation permittivity at several frequencies and minimizes or excludes dependency on external parameters, such as the permittivity of the formation mineral phase.
Claims20
A method for characterizing a geological formation, comprising:
- using a downhole logging device to perform multifrequency electromagnetic measurements of the formation;
- determining a plurality of complex permittivities of the formation at a plurality of frequencies from the multifrequency electromagnetic measurements;
- determining a plurality of complex permittivities of water in the formation at the plurality of frequencies from the multifrequency electromagnetic measurements;
- and
- determining a value of at least one formation parameter from the plurality of complex permittivities of the formation and the plurality of complex permittivities of water in the formation, wherein the at least one formation parameter is selected from the group consisting of water-filled porosity of the formation, water salinity, water saturation, tortuosity of water-filled pore space, and combinations thereof.
2 more elements
Dependencies are inferred from the claim text.