METHOD FOR IMPROVING OPERATION OF HORIZONTAL OIL PRODUCING WELL Russian patent published in 1996 - IPC

FIELD: oil production, bringing into operation horizontal producing wells drilled in carbonate strata of various porosity. SUBSTANCE: horizontal well is driven through stratum zones of low and high porosity. Acid treatment is carried out in two stages, in so doing, acid treatment of low intensity is performed at the first stage through all length of the horizontal shaft. Acid treatment of high intensity is performed at the second stage at the section of the horizontal shaft passing through the zone of low porosity and at the length being not less than one third the length of the entire horizontal shaft. Zone of horizontal shaft nearby water bearing contacting is selected and eliminated from being affected by acid treatment of high intensity. EFFECT: high productivity. 2 cl