METHOD OF SUPERVISCOUS OIL FIELD DEVELOPMENT Russian patent published in 2014 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to development of superviscous oil deposit using heat for heating of the productive formation. The concept of the invention is as follows: the method includes drilling of a pair of the upper injector and lower producer, which horizontal sections are located in parallel over each other in the vertical plane, heating of the formation by steam injection to the both wells with formation of a steam chamber, heating of the formation intermediate zone, reducing viscosity of superviscous oil, injecting steam to the upper horizontal injector and selecting product from the lower horizontal producer. According to the invention the formation is heated by steam injection to both wells until the value of steam and oil ratio is stabilised. Hereupon three modes of development are used in sequence for the superviscous oil deposit. The first mode includes steam injection to the injector and withhold in the formation during 48-72 hours. The second mode includes injection of propyleneglycol to the producer on the basis of 5 m³ per 100 m of the producer horizontal well with content of the base material equal to at least 98% with withhold in the formation during 12-24 hours and simultaneous circulation of water steam in the injector. The third mode includes production of superviscous oil from the producer until the values of steam and oil ratio increases in 1.5 times.

EFFECT: increasing efficiency in development of superviscous oil deposit due permeability improvement of superviscous oil in the formation area close to the producer horizontal bore as well as reducing power consumption for implementation of the method.

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