HYDRODYNAMIC METHOD OF OIL RECOVERY Russian patent published in 2003 - IPC

Abstract RU 2203399 C2

FIELD: recovery of oil from carbonate collectors at late stage of operation. SUBSTANCE: at late stage of operation system of wells is flooded with change of direction of filtration flow of fluid. Oil recovery is conducted with maintenance of formation pressure in well in interval corresponding to interval of maximum oil output for previous period. Oil output is forced when formation pressure in interval reaches maximum value. Oil recovery is stopped when minimal value of formation pressure is reached. Interval of formation pressure is determined by information collected during previous period. Dependence pressure-time is established first. Then pressure interval corresponding to interval of maximum oil output is chosen from it. EFFECT: expanded range of methods of oil recovery from carbonate collectors. 2 tbl

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RU 2 203 399 C2

Authors

Nasibullin I.M.

Dates

2003-04-27Published

2001-05-28Filed