METHOD FOR TRANSFERRING WELLS TO OPTIMALLY EFFICIENT OPERATION MODE Russian patent published in 2006 - IPC E21B43/16 

FIELD: technology for extracting and operating petroleum deposits, in particular, methods for increasing oil recovery of formation.

SUBSTANCE: method includes inspection of well and selection of optimal operation mode, which allows to reach maximal value of oil phase penetrability. In accordance to invention, transfer of wells to optimal mode is performed by decreasing debit of liquid being extracted to value, less than optimal value of liquid debit, determined during inspection, and expansion of pressure excitation in formation is caused, resulting in reaction of bed, by means of changing phase penetrability values for water and oil. This is controlled on basis of change of debit of extracted liquid and fast change of its water saturation. After that without stopping technical process debit is smoothly increased by means of frequency-adjusted drive up to value, appropriate for optimal mode, with possible setup of stationary operation of system "formation-well-pump". Optimal debit of liquid during operation of well is maintained at constant level appropriate for optimal mode.

EFFECT: increased oil recovery of formation due to increased phase penetrability of oil and decreased phase penetrability of water.

1 ex, 3 dwg