NUMERICAL MODELING OF THE INFLUENCE OF THE FACTORS OF IMPERFECTION OF PERFORATION ON VELOCITY FIELDS IN AN OIL AND GAS STRATUM

A study has been made of the pressure and velocity fi elds of fi ltration fl ows appearing in extracting hydrocarbons from sands penetrated imperfectly. The problem on the pressure fi eld has been presented in which account is taken of two factors of imperfection of perforation: the fi rst is in the presence of a virgin portion in the perforation interval, and the second is caused by the noncoincidence of the perforation interval with the boundaries of a permeable saturated stratum. A fi nite-diff erence program has been created for calculating velocity and pressure fi elds in a stratum with imperfect penetration. Numerical experiment demonstrates that the infl ow from imperfectly penetrated layers of a homogeneous isotropic stratum is not uniform, and the modulus of the horizontal velocity components peaks on the boundaries of penetrated layers
A study has been made of the pressure and velocity fi elds of fi ltration fl ows appearing in extracting hydrocarbons from sands penetrated imperfectly. The problem on the pressure fi eld has been presented in which account is taken of two factors of imperfection of perforation: the fi rst is in the presence of a virgin portion in the perforation interval, and the second is caused by the noncoincidence of the perforation interval with the boundaries of a permeable saturated stratum. A fi nite-diff erence program has been created for calculating velocity and pressure fi elds in a stratum with imperfect penetration. Numerical experiment demonstrates that the infl ow from imperfectly penetrated layers of a homogeneous isotropic stratum is not uniform, and the modulus of the horizontal velocity components peaks on the boundaries of penetrated layers
Author:  A. I. Filippov, O. V. Akhmetova, M. R. Gubaidullin
Keywords:  fi ltration, imperfect penetration, two-dimensional fl ow, fi nite-diff erence program, pressure fi eld, velocity fi eld
Page:  1490