INVERT EMULSION FOR OIL RESERVOIRS TREATMENTIT'S COMPOSITION, PREPARATION AND APPLICATION METHODS Russian patent published in 2010 - IPC C09K8/584 E21B43/22 

FIELD: oil-and gas industry.

SUBSTANCE: invention related to oil production from a reservoir and can be used in oil reservoirs development for current reservoir recovery increase, also for production wells operation intensification. The invert emulsion for oil reservoirs treatment preparation method includes mixing an emulsifying agent Neftenol HZ-TAT, preliminary with a calcium chloride water solution in a 1:1 volume ratio, then mixing created "coffee with milk" emulsion with the left part of the water solution with the following wt % ratio: Neftenol HZ-TAT 2.5-8.0, calcium chloride 0.3-12.0, the rest is water. The invert emulsion for oil reservoirs treatment prepared with the mentioned above method. The oil reservoirs treatment with injection of the invert micro emulsion method, when Neftenol HZ-TAT is preliminary mixed with a calcium chloride water solution in a 1:1 volume ratio, then mixing created "coffee with milk" emulsion with the left part of the water solution, simultaneously injecting it at the following component wt % ratio Neftenol HZ-TAT 2.5-8.0, calcium chloride 0.3-12.0, the rest is water.

EFFECT: chemical agent consumption decrease keeping oil-driving properties.

3 cl, 2 ex, 1 tbl