METHOD OF MONITORING AND OPTIMIZING DEVELOPMENT OF OIL DEPOSIT Russian patent published in 2020 - IPC E21B49/08 G01V99/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used in development of multi-layer oil deposits. Method involves selection of oil samples and carrying out geochemical investigations with appropriate extraction of peaks and determination of geochemical parameters of oil, analysis and evaluation of oil inflows. Multi-zone deposit is selected, the beds of which completely or partially coincide in structural plan. On this deposit there selected are wells - group A, which operate all formations, but each well selects only one of formations. Geochemical analysis of oil samples from the given wells of group A is carried out and geochemical parameters of oil of each formation are determined. Then oil samples are taken from the remaining wells - group B, each of which exploits several formations. Geochemical analysis of said samples is carried out, compared with geochemical parameters of oil, which are specific for each of the formations identified by analysis from wells of group A, and percentage distribution of oil inflow from each formation in wells of group B is determined. With difference in oil recovery from formations in 20% and more in wells of group B there performed are measures on inflow leveling.

EFFECT: higher oil recovery of multi-layer oil deposit.

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