METHOD OF HIGH-VISCOSITY OIL POOL DEVELOPMENT Russian patent published in 2009 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil industry and may find application in development of high-viscosity oil pool. According to method, dia hole is cemented in pressure well to pay foot, cased to pay roof, and cased part of well is cemented, leaving pay interval open. Well is equipped with flow column with support onto cemented dia hole, at the bottom flow column is provided with flat plug, bottom part of flow column is perforated to half of pay interval, and packer is installed above perforation on flow column. While packer is not yet installed, heated dissolvent is pumped through flow column, and dissolvent with part of high-viscosity oil is withdrawn along intertubular space of well. Packer is installed. Pumping of heated dissolvent is continued along flow column as well as withdrawal of dissolvent and high-viscosity oil in intertubular space. Dissolvent pumping is stopped. On day surface dissolvent is regenerated with separation of high-viscosity oil, dissolvent and high-viscosity oil are withdrawn along flow column by sucker-rod pump with creation of dilatation load on cemented dia hole. Described operations are repeated on neighboring well, which has hydrodynamic connection with this well, at that during withdrawal by sucker-rod pump in one well, heated dissolvent is pumped in the other well, and vice versa, and after hydrodynamic interaction has been established between wells, heated dissolvent is pumped through one well, and oil is withdrawn by sucker-rod pump in the other well, at that periodically flow diverting agents are pumped together with dissolvent. By analogy, works are carried out in other wells until oil pool resources are worked out.

EFFECT: increase of pool oil recovery.

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