DEVELOPMENT METHOD OF OIL DEPOSIT WITH OIL-WATER ZONES Russian patent published in 2012 - IPC E21B43/20 

FIELD: oil and gas industry.

SUBSTANCE: method involves construction at least of one well with horizontal section, fluid injection and extraction of the bed product. Section of deposit in the form of oil-bearing lens and level of oil-water contact - OWC - is determined. Well is built with horizontal section arranged below OWC level and with ascending working face located above OWC level. After that, drilling of the bed of two well sections arranged above OWC level and horizontal section, and insulation of horizontal section from the drilling section located above OWC level on the side of the well mouth is performed. After that, the product is extracted from the drilled section of the bed, which is located above OWC level on the mouth side, and fluid is injected from horizontal section to the drilling section located above OWC level, on the side of working face due to negative pressure created with the bed product extraction above OWC level.

EFFECT: improving the development degree of oil resources, reducing the costs for construction of additional wells and achieving complete output of productive bed.

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