METHOD FOR DEVELOPMENT OF PARAFFIN OIL POOL Russian patent published in 1997 - IPC

FIELD: oil producing industry, in particular, development of deposits of oils saturated with paraffin. SUBSTANCE: method includes withdrawal of oil through producing wells and injection of water through at least one injection well. Injection well is drilled vertically to pool roof, then horizontally over the roof with entering the producing formation. After vertical part of well, wellbore is branched into horizontal radial parts. Minimum length of horizontal part is selected to ensure heating of water injected in pool at inlet into formation on each branched wellbore to temperature of not less than that of paraffin precipitation. Minimum length is determined by special formulas. EFFECT: higher efficiency.