METHOD OF TREATMENT OF BOTTOM-HOLE ZONE OF THE HORIZONTAL SHAFTS OF BOREHOLES, OPENING CARBONATE COLLECTOR Russian patent published in 2016 - IPC E21B43/16 E21B43/27 E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used in treatment of bottom-hole zone of horizontal shafts of boreholes, penetrated carbonate collector. According to the method is determined pressure of fluid absorption in open horizontal borehole with cased production string in vertical part. There is performed processing of open horizontal borehole by fluid, providing the absence of absorption. After that, at the wellhead collected from bottom to top and is lowered into open horizontal hole, which consists of a perforated liner with centralizers, the packer, disconnector, the process pipes string. Descent of build is lowered to reach with the lower end of a perforated liner bottom horizontal borehole. Then inside a perforated liner is lowered a string pump-compressor tubes - PCT and up to 5 m till the lower end of the tubing string PCT of he lower end of a perforated liner lowering of tubing string PCT is stopped. Upper end of the production string is equipped with casing valve with casing-head stuffing box. Upper end of the process pipe string is equipped with shell valve with stuffing box. On upper end of the tubing pipe PCT tube valve is mounted. At open pipe and shell valves and closed casing valve is pumped into the tubing PCT invert emulsion. It is injected by acid composition to filling tube space of the well by reverse emulsion. Casing valve is closed and opened shell valve and continued pumping of acid composition through casing space of well in tank. Produce circulation of the acid composition to the loss of activity of acid composition. After that, circulation of the acid composition is stopped. Casing valve is closed and open shell valve. By pumping of fluid in shell space of the well is displaced the invert emulsion from shell valve to the casing space of well. By reverse emulsion is displaced the products of reaction of acid composition with carbonate reservoir through the casing valve in tank. Packer seating is performed. Disconnector is disconnected and process pipe string removed from the well. Perforated liner is left in the horizontal well bore. Well is equipped with production equipment and put it into operation.

EFFECT: high efficiency of processing.

1 cl, 2 dwg