Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2008-01-15
2010-12-07
Khuu, Cindy H (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C166S250100
Reexamination Certificate
active
07848895
ABSTRACT:
Stress rotation due to depletion can be estimated in reservoirs having an impermeable reservoir boundary. More specifically, the isotropic change in stress due to depletion, and the uniaxial stress resulting from a change in pore pressure across an impermeable boundary are both modeled as perturbations to an initial stress state. These perturbations can result in a rotation of the principal stress directions. Estimates of the stress rotation are helpful for hydraulic fracturing operations, because fracture tends to occur in a plane perpendicular to the least principal stress.
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Day-Lewis Amy D. F.
Kim Sangmin
Zoback Mark D.
Khuu Cindy H
Lumen Patent Firm
The Board of Trustees of the Leland Stanford Junior University
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