METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2009 - IPC E21B43/20 E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil industry and may find application in development of non-uniform watered oil pool. According to method, oil pool is watered, oil-bitumen product is pumped into edging layer, and oil is withdrawn from producing layers. Heat-insulated pipes are lowered into vertical part of cavity, through which unheated low-viscosity oil is squeezed into developed pool layer, oil-bitumen product is squeezed in heated form, and unheated low-viscosity oil of developed pool is squeezed. Squeezing is done into upper part of producing layer not lower than water and oil contact. Oil-bitumen product is mixture of oil-bitumen and cement in ratio of 1:(0.3-0.7), accordingly, by volume. Per 1 running meter of oil-saturated part 1.2-2.0 m³ of oil-bitumen and cement mixture is used. Pumping is done until pressure increases at well collar to value equal to hydrostatic pressure ±30%. Technological holding is carried out until cement hardens. Well development is done cyclically: flushing with oil and oil withdrawal for 1-2 days - stop for 1-2 days with number of cycles from 2 to 4, after that continuous oil withdrawal is started. If pressure of oil-bitumen product reduces and well capacity increases, operations with oil-bitumen product are repeated.

EFFECT: increase of pool oil recovery.

2 cl, 2 ex