METHOD OF SELECTION OF METHODS OF STIMULATION OF BOTTOM-HOLE ZONE OF TERRIGENOUS FORMATIONS IN PRODUCING WELLS AT LATE STAGE OF DEVELOPMENT Russian patent published in 1997 - IPC

FIELD: development of oil and oil-gas deposits with terrigenous reservoirs at the late stage of development. SUBSTANCE: method of selection of methods of stimulation of bottom-hole zone of terrigenous formations includes preliminary determination of technological efficiency of stimulation types by accumulated experience of well operation. Revealed are groups of wells by the parameters of the process technology and methods of their stimulation by the results of the determined technological efficiency. Well groups are formed by the ranges of change of fluid recovery rate. Estimation of technological efficiency of work of stimulation of bottom-hole formation zone of each well is carried out. Parameters are calculated which characterize the results of each realized technology with separation of fractions of effect responsible for change in fluid withdrawal and well water flooding. The method of stimulation is selected by calculated maximum values of efficiency parameters. Selected for primary stimulation are wells providing the maximum increase of the current recovery. The last to be stimulated are the wells showing the lowest increment in oil recovery. EFFECT: increased current oil recovery due to application of stimulation methods ensuring the highest increment in oil recovery. 1 dwg, 7 tbl