Fractures treatment

A method to treat a subterranean formation penetrated by a wellbore, comprising:

• injecting a treatment fluid into the subterranean formation to form a hydraulic fracture system, wherein the treatment fluid comprises:
• a viscosified carrier fluid having a viscosity above 50 mPa-s at a shear rate of 170 s-1 and a temperature of 25° C.;
• proppant dispersed in the carrier fluid;
• and
• channelant containing 0.1 to 20 wt % silicones dispersed in the carrier fluid.

A method of placing a proppant pack into a fracture formed in a subterranean formation, the method comprising:

• injecting well a treatment fluid comprising proppant and channelant through a wellbore into a fracture in a subterranean formation, wherein the channelant contains 0.1 to 20 wt % silicones;
• placing the proppant in the fracture in a plurality of proppant clusters forming pillars spaced apart;
• and,
• removing the channelant to form open channels around the pillars for fluid flow from the formation through the fracture toward the wellbore;
• wherein the treatment fluid comprises alternating volumes of proppant-rich fluid and proppant-lean fluid.

A method to treat a subterranean formation penetrated by a wellbore, comprising:

• injecting a treatment fluid, comprising particulate and at least a channelant containing 0.1 to 20 wt % silicones, above a fracturing pressure into the formation to distribute a mixture of a solid particulate in a fracture;
• alternatingly injecting solid particulate-rich and solid particulate-lean substages of the treatment fluid stage into the fracture, wherein a volume of each of the solid particulate-rich substages is larger than a respective volume of an adjacent one of the solid particulate-lean substages to form a plurality of solid particulate-rich island regions in the fracture and an interconnected network of open channel regions between the island regions;
• channelizing the particulate-rich island regions in situ in the fracture to form particulate clusters within the island regions separated from adjacent particulate clusters by open voids in the island regions;
• reducing pressure in the fracture to close the fracture onto the island regions;
• and
• hydraulically conducting fluid flow through the open channel regions between the formation and the wellbore.

A system to treat a fracture interval of a formation penetrated by a wellbore, comprising:

• a subterranean formation penetrated by a wellbore;
• a treatment fluid stage disposed at least partially in the wellbore, the treatment fluid stage comprising solid particulate-rich and solid particulate-lean substages, wherein a volume of each of the solid particulate-rich substages is equal or larger than a respective volume of an adjacent one of the solid particulate-lean substages to form a plurality of solid particulate-rich island regions in the fracture and an interconnected network of open channel regions between the island regions;
• the solid particulate-rich substages each comprising alternating pulses comprising a substantially uniform distribution of one or more components in the alternate pulses and a heterogeneous distribution between alternate pulses of at least one other component to channelize the particulate-rich island regions in situ in the fracture to form particulate clusters within the island regions separated from adjacent particulate clusters by open voids within the island regions;
• a pump system to inject the treatment fluid stage from the wellbore to the formation at a pressure above fracturing pressure to inject the treatment fluid stage into a fracture in the formation;
• and
• a shut in system to close the fracture onto the solid particulate-rich island regions
• wherein at least the particulate-rich substages comprise a channelant containing 0.1 to 20 wt % silicones.