This research is focused on development and enhancement of the model of fluid flow
in a formation with stress-dependent permeability. Several typical axi-symmetrical problems
of fluid flow in a multi-layered reservoir with account for wellbore storage and skin have
been solved numerically. The permeability was assumed to be a function of the vertical
deformation of the reservoir. This deformation is the result of changing stress-strain state in
the elastic system, comprised of the reservoir itself and the surrounding rock mass. The
change in the stress-strain state of the system is induced by pressure change in the layers of
the reservoir.
Numerical results qualitatively agree with observed field behavior. Such behavior
includes (1) deviation of an inflow performance curve from the straight-line relationship at
pressures above bubble-point pressure, (2) time- and rate-dependence of well-testing
derivative, (3) asymmetry of processes of production and of injection, and (4) inconsistent
results between drawdown and buildup, or injection and falloff tests.
Based on the results, a procedure to estimate the parameters of the suggested
permeability model is proposed.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/3330 |
| Date | 12 April 2006 |
| Creators | Diyashev, Ildar |
| Contributors | Holditch, Stephen A. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 1830275 bytes, electronic, application/pdf, born digital |
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