METHOD FOR REMOVAL OF BITUMEN TO IMPROVE PERMEABILITY OF FORMATION Russian patent published in 2018 - IPC E21B43/22 E21B43/26 E21B43/40 C09K8/524 

FIELD: chemistry.

SUBSTANCE: present invention relates to a processing method and a treatment fluid to increase the permeability of the formations of organic shale. Treatment method includes treating the formation of organic shale with a treatment fluid. Method for treating an organic shale formation to increase permeability and oil recovery, including the use of a wellbore passing through an organic shale formation, for treating at least a portion of a shale formation with a treatment fluid by injecting a treatment fluid into a portion of the formation of an organic shale, where the treatment fluid contains a solvent emulsion that dissolves the bitumen in the shale formation and increases the permeability of the shale formation, a surfactant having a hydrophilic-lipophilic balance between 10.5 and 18, and the diluent, and after injection, extract oil from a shale formation through the wellbore. Invention is developed in dependent items of the formula.

EFFECT: technical result is an increase in processing efficiency.

15 cl, 10 dwg