Electric fracturing operation system

Abstract

An electric fracturing operation system includes a water storage device, a fracturing device, a blending device and a sand mixing device, wherein the water storage device is a flexible water tank; the flexible water tank is connected with the blending device; the fracturing device includes multiple electrically-driven fracturing pumps; the blending device is configured to blend fracturing base fluid and storing the fracturing base fluid in a fluid preparing tank; an inlet of the sand mixing device is connected with the fluid preparing tank and a sand storage and conveying tank; an outlet of the sand mixing device is connected with inlets of all the electrically-driven fracturing pumps through low-pressure manifolds; and outlets of all the electrically-driven fracturing pumps are connected with a wellhead through high-pressure manifolds.

1 . An electric fracturing operation system, comprising a fracturing device, a water storage device, a blending device, a sand mixing device, a fluid preparing tank and a sand storage and conveying tank, wherein:
 the fracturing device comprises multiple electrically-driven fracturing pumps and fracturing frequency conversion stations;   the water storage device is connected with the blending device;   the blending device is configured to blend fracturing base fluid and store the fracturing base fluid in the fluid preparing tank;   the fluid preparing tank is connected with an inlet of the sand mixing device or inlets of the fracturing device;   the sand storage and conveying tank is connected with the inlet of the sand mixing device;   an outlet of the sand mixing device is connected with the inlets of the fracturing device through low-pressure manifolds; and   a wellhead is connected with outlets of the fracturing device through high-pressure manifolds.   
     
     
         2 . The electric fracturing operation system according to  claim 1 , wherein a power source of the electric fracturing operation system is a public power grid or a power generation device. 
     
     
         3 . The electric fracturing operation system according to  claim 1 , wherein the water storage device is a flexible water tank. 
     
     
         4 . The electric fracturing operation system according to  claim 2 , wherein electric energy provided by the public power grid or the power generation device enters a high-voltage distribution station, the high-voltage distribution station distributes the electric energy into at least one of the fracturing device, the water storage device, the blending device, the sand mixing device, the fluid preparing tank, the sand storage and conveying tank, the low-pressure manifolds and the high-pressure manifolds. 
     
     
         5 . The electric fracturing operation system according to  claim 4 , further comprising a command and control center, which is powered by the high-voltage distribution station and is configured to control the fracturing device, the water storage device, the blending device, the sand mixing device, the fluid preparing tank, the sand storage and conveying tank, the low-pressure manifolds and the high-pressure manifolds. 
     
     
         6 . The electric fracturing operation system according to  claim 5 , wherein any one of the fracturing device, the water storage device, the blending device, the sand mixing device, the fluid preparing tank, the sand storage and conveying tank, the low-pressure manifolds and the high-pressure manifolds is electrically driven. 
     
     
         7 . The electric fracturing operation system according to  claim 6 , wherein the fracturing device and the blending device are vehicle-mounted or skid-mounted. 
     
     
         8 . The electric fracturing operation system according to  claim 6 , wherein each of the fracturing frequency conversion stations is corresponding to one or two electrically-driven fracturing pumps. 
     
     
         9 . The electric fracturing operation system according to  claim 6 , wherein each of the electrically-driven fracturing pumps is a three-cylinder or five-cylinder plunger pump. 
     
     
         10 . The electric fracturing operation system according to  claim 6 , wherein the power generation device is a gas generator set, a diesel generator set or a turbine generator set. 
     
     
         11 . The electric fracturing operation system according to  claim 1 , wherein there are multiple water storage devices which are connected with each other in series and then connected with the blending device. 
     
     
         12 . The electric fracturing operation system according to  claim 5 , wherein there are multiple fluid preparing tanks which are connected with each other in series and then connected with the sand mixing device. 
     
     
         13 . The electric fracturing operation system according to  claim 5 , further comprising an acid storage tank and an acid supply device, wherein the acid storage tank provides acid for the fracturing device through the acid supply device, and the acid supply device is powered by the high-voltage distribution station and controlled by the command and control center.