DEVELOPMENT METHOD OF OIL DEPOSIT AT LATE STAGE Russian patent published in 2013 - IPC E21B43/20 E21B47/00 

FIELD: oil and gas industry.

SUBSTANCE: method involves drilling of production and injection wells, pumping of displacement agent through injection wells and extraction of the product through production wells, drilling of additional wells, and development of residual oil-saturated intervals. According to the invention, in all newly drilled additional wells there determined are residual oil-saturated and flooded intervals prior to the well casing. For that purpose, one-stage determination of temperature field is performed throughout the length of the well in real time both at filling of the shaft with heated washing liquid or water and after it is filled using an optic-fibre system. In case of absorption of washing liquid or water, volume of their supply, which provides full filling of the well, is increased. After the well casing residual oil-saturated and/or water-saturated intervals are developed, and displacement agent is extracted and/or pumped.

EFFECT: increasing oil recovery owing to improving the accuracy of determination of intervals of arrangement of water-saturated and residual oil-saturated zones.

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