METHOD OF DEVELOPMENT OF OIL FORMATION Russian patent published in 1997 - IPC

FIELD: oil producing industry, particular, development of nonuniform and heavily watered deposits with use of horizontal and inclined boreholes. SUBSTANCE: withdrawal of formation products is carried out with provision of the required rarefaction in different sections of horizontal or inclined borehole and displacement of inlet of tubing and withdrawal of products from the formation, from the interval of this displacement is accomplished with installation of one or several packets movable over the tubing. Each successive displacement of tubing and isolation of a section of horizontal or inclined branch are accomplished only the content of oil in the products withdrawn from the formation reaches the preset minimum value. products from isolated interval are withdrawn periodically. In the intervals between withdrawals, intensifying agent of mixture of several agents is injected into the isolated section, and forced by the gasified liquid, foam or gas into formation. EFFECT: higher coefficient of oil recovery and reduced energy consumption in oil recovery. 1 dwg