METHOD OF OPTIMIZATION OF DEVELOPMENT AND INCREASE OF PRODUCTIVITY OF OIL AND OIL-GAS DEPOSITS

摘要

FIELD: development of oil and oil-gas deposits with electrical stimulation of producing wells for increase of oil stimulation of producing wells for increase of oil recovery from producing formations. SUBSTANCE: method includes pumping out of fluid from producing formations through producing wells and stimulation of formation with pulse current of different polarities for not more than 30h with pulse duration of 0.01-1s and pulse duration ratio of at least 2 with supplied power through two treated wells up to 500kW. Selected first for electrical treatment are deposits with maximum quantity of wells featuring the highest level of water cutting of produced fluid. First of all on this deposit, subject to treatment are wells with high level of water encroachment not reaching the planned oil recovery coefficient. Selected for treatment from these wells are wells with high fluid producing rate. In this case, at least, one producing well with low water cutting of produced fluid shall be located nearer to injection well than selected for each next electrical treatment. Similar procedure is used in selection and electrical treatment of wells of the second and next turns, in each next of which limit water encroachment level may be reached later. Electrical treatment on selected deposit is carried out until relative quantity of wells attaining maximum high level of water cutting of produced fluid becomes lower than on one of other deposits, to which then process of electrical treatment is transferred and carried out using the offered procedure. EFFECT: increased productivity of oil and oil-gas deposits. 1 dwg