Simultaneous estimation of relative permeabilities and capillary pressure
- Institut Francais du Petrole (IFP), 92 - Rueil-Malmaison (France)
- Inria, La Chesnay (France)
In this paper, an automatic numerical method is proposed for simultaneous determination of relative permeabilities and capillary pressure from the results of a single two-phase flow experiment in a range of velocities representative of field flow conditions. The experiment is a standard imbibition or drainage displacement with an imposed difference of pressure or flow rate. The experimental data used are the outlet production, the pressure drop between the two faces, and local saturation profiles at different times along the core. Relative permeabilities and capillary pressure are estimated with a least-square technique. Use of a high-order numerical scheme significantly reduces the numerical diffusion. The optimal control theory is used to solve the minimization problem. The corresponding FORTRAN code is generated by a symbolic program. The validity of the method first is demonstrated with simulated data, then is tested in tow laboratory experiments: one imbibition and one drainage. Good agreement is obtained for both situations.
- OSTI ID:
- 6965286
- Journal Information:
- SPE Formation Evaluation (Society of Petroleum Engineers); (United States), Journal Name: SPE Formation Evaluation (Society of Petroleum Engineers); (United States) Vol. 7:4; ISSN 0885-923X; ISSN SFEVEG
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020200* -- Petroleum-- Reserves
Geology
& Exploration
CAPILLARY FLOW
DATA
DISPLACEMENT FLUIDS
DRAINAGE
DRILL CORES
EXPERIMENTAL DATA
FLOW MODELS
FLUID FLOW
FLUIDS
GEOLOGIC DEPOSITS
INFORMATION
MATHEMATICAL MODELS
MINERAL RESOURCES
NUMERICAL DATA
NUMERICAL SOLUTION
OIL FIELDS
OPTIMIZATION
PERMEABILITY
PETROLEUM DEPOSITS
RESERVOIR PRESSURE
RESERVOIR ROCK
RESOURCES
SCALE MODELS
STRUCTURAL MODELS