PROCEDURE FOR DEVELOPMENT OF OIL DEPOSIT WITH LOW THICKNESS Russian patent published in 2011 - IPC E21B43/20 

FIELD: gas and oil production.

SUBSTANCE: procedure consists in construction of vertical producers and pressure wells, in determination of geological structure of deposit, in construction of at least one well with wave-shape section in reservoir used both for pumping working fluid and for extraction of deposit product, in development of deposit including pumping working fluid through pressure wells and withdrawal of deposit product through producers. According to the invention at determination of a geological structure there are defined zones located at external contour of oil saturation of deposit with less payable oil saturated thickness. Further, horizontal sections are led from near producers along defined oil saturated thickness and along shortest distance to external contour of the deposit without its opening. During development of the deposit the producers with horizontal sections are subjected to fast withdrawal of deposit product. When product withdrawn from these wells is watered out above an allowed level they are successively turned into pressure wells. The procedure facilitates successive extraction of oil from these zones without construction of additional wells which increases payout of development of the given deposit at 10-15 %.

EFFECT: raised efficiency of development of oil deposit in reservoir with low thickness due to increased coverage and inclusion of low thickness of reservoirs in zones close to periphery of external contour of oil saturation into development and due to successive withdrawal of oil from these zones without construction of additional wells.

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