OIL PRODUCTION OF COMPLEX STRATUMS AT TWO-PHASE FILTRATION OF NON-NEWTONIAN OIL
V. M. Konyukhov, P. A. Mashen`khin, A. N. Chekhalin
VANT. Ser.: Mat. Mod. Fiz. Proc 2013. Вып.2. С. 63-77.
Considered here are the problems of mathematical and numerical simulation of filtration of non-newtonian oil and bottom water in a crack-porous stratum penetrated by a straight producer well in a required flow rate. The system of two-phase filtration equations in cracks and blocks accounts for gravitational forces due to different phase densities, stratum oil, water and rock compressibility, stratum pressure dependence of cracks absolute permeability, non-newtonian oil characteristics versus filtration rate module. The corresponding software algorithms have been developed for numerical solution.
The impact analysis has been carried out for different poroperm and geometric properties of reservoir, as well as for oil production well operation. It is shown that the less is the filtration rate module of the oil structural ultimate destruction, the higher is the oil production. The stratum length (at other conditions being equal) results in oil production degradation. The non-monotonic well flow rate dependence of oil production is due to non-newtonian oil property. The most efficient is the cyclic well operation when the correlation between the well downtime and operation periods is specified by the relation of oil viscosity with damaged and undamaged structure.Keywords: numerical simulation, two-phase filtration, crack-porous stratum, non-newtonian oil, bottom water.
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