METHOD OF WELL COMPLETION Russian patent published in 2003 - IPC

FIELD: oil producing industry; applicable in well construction and completion. SUBSTANCE: method includes squeeze cementing of previously perforated intervals and installation in well of cement bridge with formation of a new artificial bottomhole above intervals of perforation. Drilled under repressuring from depth of above upper interval of perforation is new inclined wellbore with transition into horizontal wellbore in nonmined formation, or inclined wellbore running through several nonmined formations. Zones of absorption and rock caving are determined in producing formation. Casing string is lowered down to last absorption zone or rock caving zone, and annular space is cemented. Drilled at equilibrium or repressuring conditions through casing string, is horizontal wellbore of smaller diameter and left without casing string. Diameter of uncased horizontal wellbore is set within 100 mm with ratio of lengths of uncased and cased parts within 1:(3-10). EFFECT: higher well productivity. 2 cl, 1 ex