US 2026/0195500 A1Published application

Assessing the efficacy of test measurements in parameter characterization of geological models

AssigneeSchlumberger Technology Corporation

InventorsLei Jiang, Florian Hollaender, Morten Kristensen, William J. Bailey

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Abstract

A method may include identifying known parameters based on a geological model representative of a subsurface region and identifying uncertain parameters associated with the geological model based on the known parameters and field operations previously performed within the subsurface region. The operations may also include generating a simulated test design to estimate the uncertain parameters based on the known parameters by determining a sensitivity coefficient matrix at different time points for each of one or more simulated measurements associated with estimated uncertain parameters based on the simulated test design and determining a residual uncertainty associated with the estimated uncertain parameters based on the sensitivity coefficient matrix. The method may also include generating an updated simulated test design to estimate the second set of parameters based on the known parameters in response to the residual uncertainty being greater than a threshold.

Claims20

Dependent claims

A system, comprising:

a processing system comprising one or more processors;
a memory storing instructions, that when executed by the processing system, are configured to cause the processing system to perform operations comprising:
identifying a first set of parameters based on a geological model representative of a subsurface region;
identifying a second set of parameters associated with the geological model based on the first set of parameters and one or more field operations previously performed within the subsurface region, wherein the second set of parameters is associated with one or more uncertain parameters;
generating a simulated test design configured to estimate the second set of parameters based on the first set of parameters wherein generating a simulated test design comprises:
determining a sensitivity coefficient matrix at one or more different time points for each of one or more simulated measurements associated with an estimated second set of parameters based on the simulated test design;
determining a residual uncertainty associated with the estimated second set of parameters based on the sensitivity coefficient matrix;
and
generating an updated simulated test design configured to estimate the second set of parameters based on the first set of parameters in response to the residual uncertainty being greater than a threshold.

6 more elements

A tangible, non-transitory, computer-readable medium comprising instructions that, when executed by processing circuitry, are configured to cause the processing circuitry to perform operations comprising:

identifying a first set of parameters based on a geological model representative of a subsurface region;
identifying a second set of parameters associated with the geological model based on the first set of parameters and one or more field operations previously performed within the subsurface region, wherein the second set of parameters is associated with one or more uncertain parameters;
generating a simulated test design configured to estimate the second set of parameters based on the first set of parameters wherein generating a simulated test design comprises:
determining a sensitivity coefficient matrix at one or more different time points for each of one or more simulated measurements associated with the estimated second set of parameters based on the simulated test design;
determining a residual uncertainty associated with the estimated second set of parameters based on the sensitivity coefficient matrix;
and
generating an updated simulated test design configured to estimate the second set of parameters based on the first set of parameters in response to the residual uncertainty being greater than a threshold.

4 more elements

A method comprising:

identifying a first set of parameters based on a geological model representative of a subsurface region;
identifying a second set of parameters associated with the geological model based on the first set of parameters and one or more field operations previously performed within the subsurface region, wherein the second set of parameters is associated with one or more uncertain parameters;
generating a simulated test design configured to estimate the second set of parameters based on the first set of parameters wherein generating a simulated test design comprises:
determining a sensitivity coefficient matrix at one or more different time points for each of one or more simulated measurements associated with the estimated second set of parameters based on the simulated test design;
determining a residual uncertainty associated with the estimated second set of parameters based on the sensitivity coefficient matrix;
and
generating an updated simulated test design configured to estimate the second set of parameters based on the first set of parameters in response to the residual uncertainty being greater than a threshold.

4 more elements

Dependencies are inferred from the claim text.