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US 10,577,908 B2Granted
Workflow for determining stresses and/or mechanical properties in anisotropic formations
AssigneeSchlumberger Technology Corporation
InventorsSaad Kisra, John Adam Donald, Vincenzo De Gennaro
Life of this patent
Estimating the term…
Abstract
A method, apparatus, and program product estimate anisotropic properties of an anisotropic formation based at least in part on determinations of a deviation of a wellbore associated with the anisotropic formation and an availability of non-sonic measurement data associated with the anisotropic formation. The determinations are used in the selection of at least one computer-implemented model that in turn may be applied to determine one or more unknown elastic constants for an elastic stiffness matrix.
Claims20
A method of estimating properties of an anisotropic formation, the method comprising:
- determining a deviation of a wellbore associated with the anisotropic formation;
- determining input sources for a first subset of a plurality of elastic constants for a stiffness matrix based upon the determined deviation of the wellbore, each of the determined input sources providing sonic measurement data for use in determining at least one elastic constant among the plurality of elastic constants;
- determining an availability of non-sonic measurement data associated with the anisotropic formation;
- selecting at least one computer-implemented model among a plurality of computer-implemented models based at least in part upon the determined availability of non-sonic measurement data;
- applying the selected at least one computer-implemented model to determine a second subset of the plurality of elastic constants for the stiffness matrix;
- and
- estimating an anisotropic stress or an anisotropic mechanical property for the anisotropic formation using the determined plurality of elastic constants for the stiffness matrix.
4 more elements
An apparatus, comprising:
- at least one processing unit;
- and
- program code configured upon execution by the at least one processing unit to estimate properties of an anisotropic formation by:
- determining a deviation of a wellbore associated with the anisotropic formation;
- determining input sources for a first subset of a plurality of elastic constants for a stiffness matrix based upon the determined deviation of the wellbore, each of the determined input sources providing sonic measurement data for use in determining at least one elastic constant among the plurality of elastic constants;
- determining an availability of non-sonic measurement data associated with the anisotropic formation;
- selecting at least one computer-implemented model among a plurality of computer-implemented models based at least in part upon the determined availability of non-sonic measurement data;
- applying the selected at least one computer-implemented model to determine a second subset of the plurality of elastic constants for the stiffness matrix;
- and
- estimating an anisotropic stress or an anisotropic mechanical property for the anisotropic formation using the determined plurality of elastic constants for the stiffness matrix.
7 more elements
A program product, comprising:
- a computer readable medium;
- and
- program code stored on the computer readable medium and configured upon execution by at least one processing unit to estimate properties of an anisotropic formation by:
- determining a deviation of a wellbore associated with the anisotropic formation;
- determining input sources for a first subset of a plurality of elastic constants for a stiffness matrix based upon the determined deviation of the wellbore, each of the determined input sources providing sonic measurement data for use in determining at least one elastic constant among the plurality of elastic constants;
- determining an availability of non-sonic measurement data associated with the anisotropic formation;
- selecting at least one computer-implemented model among a plurality of computer-implemented models based at least in part upon the determined availability of non-sonic measurement data;
- applying the selected at least one computer-implemented model to determine a second subset of the plurality of elastic constants for the stiffness matrix;
- and
- estimating an anisotropic stress or an anisotropic mechanical property for the anisotropic formation using the determined plurality of elastic constants for the stiffness matrix.
7 more elements
Dependencies are inferred from the claim text.