METHOD OF BITUMEN DEPOSIT DEVELOPMENT Russian patent published in 2010 - IPC E21B43/24 

FIELD: oil and gas production.

SUBSTANCE: method includes construction of a pair of horizontal wells, one of which is parallel and above the other, bed heating to create a steam chamber, following steam flooding in the first well and withdrawal through the second well. The second well lies on a water-bitumen interface. The a water-bitumen interval of the deposit under the second well, there is a parallel third horizontal well that has two wellheads; the bed is heated by steam flooding in the first and third wells; thereafter, a steam flooding mode is used for the first and second wells with the forced withdrawal of formation fluids through the third well to ensure a stable bitumen concentration in production. It is changed with the steam flooding mode for the first well with withdrawal of the formation fluids through the second well, when observing growing and stabilising water content in its production, the steam flooding mode is actuated again for the first and second wells with forced withdrawal of the formation fluids through the third well. Two previous modes are sequenced to develop recovered bitumen reserve. It allows increasing recovered bitumen reserve due to extended coverage of the bed and reducing watering of the recovered production owing to water influx barring.

EFFECT: accumulation of recovered bitumen reserve due to extended coverage of the bed and reducing watering of the recovered production owing to water influx barring.

2 dwg