The problem of choosing a rational bottom-hole pressure (BHP) in oil wells in Western Siberia drilled on traditional terrigenous reservoirs is considered. Data on the operating modes of about 1500 wells of 65 facilities of 20 oil fields in Western Siberia were processed. The geological and physical characteristics of the studied productive strata are presented. The average values for groups of flooded wells in the BHP ranges relative to the saturation pressure (SP) are determined: more than 0,9 BHP; (0,7-0,9 BHP); (0,7-0,5 BHP); less than 0,5 BHP. Examples of sustainable operation of flooded wells operating at very low BHP < 0,5 are shown. The average technological parameters were determined by the groups of wells: the depth of the pump descent, the dynamic level, the flow rates of oil and liquid, the water cut of products, the initial and current reservoir pressures, BHP, productivity coefficients, etc. An example is given of successful development of a low-water section of the ultra-low-permeability reservoir AC10-12 of the Priobskoye field at BHP twice as low as SP. By constructing sliding displacement characteristics, the positive effect of reducing BHP (significantly lower than SP) on the value of recoverable oil reserves was estimated. The long-term experience of operating flooded wells in Western Siberia at low BHP was recognized as successful and highly effective.
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