Heterogeneous proppant placement in a fracture with removable channelant fill

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

• injecting well treatment fluid comprising proppant and channelant through a wellbore into a fracture in a subterranean formation, wherein the proppant comprises from 1 to 100 percent in weight of stiff, low-elasticity and low-deformability elongated particles;
• placing the proppant in the fracture in a plurality of proppant clusters forming pillars spaced apart by the channelant;
• 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 channelant comprises a solid acid-precursor to generate acid in the fracture.

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

• injecting well treatment fluid comprising elastic and deformable material, proppant and channelant through a wellbore into a fracture in a subterranean formation, wherein the proppant comprises from 1 to 100 percent in weight of stiff, low-elasticity and low-deformability elongated particles;
• placing the proppant in the fracture in a plurality of proppant clusters forming pillars and spacing the pillars apart by the channelant disposed in a plurality of channels between the plurality of proppant clusters;
• and,
• removing the channelant to form open channels around the pillars for fluid flow from the formation through the fracture toward the wellbore.

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

• injecting well treatment fluid comprising proppant and channelant through a wellbore into a fracture in a subterranean formation, wherein the proppant comprises from 1 to 100 percent in weight of stiff, low-elasticity and low-deformability particles having a shape with a length basis aspect ratio greater than 5;
• placing the proppant in the fracture in a plurality of proppant clusters forming pillars and spacing the pillars apart by the channelant disposed in a plurality of channels between the plurality of proppant clusters;
• and,
• removing the channelant to form open channels around the pillars for fluid flow from the formation through the fracture toward the wellbore.