Patent ID: 8936083
Filing Date: 2015-01-20
Classification: E21B

Abstract:
1. A method comprising: a) introducing high-density proppants into a fracture within a subterranean formation, wherein the fracture has a lower portion and an upper portion; b) introducing a spacer gel into the fracture; c) introducing low-density proppants into the fracture; d) repeating any sequence of a), b), and c) until a predetermined amount of high-density proppants, spacer gel, and low-density proppants has been introduced into the fracture; e) allowing the high-density proppants to migrate to the lower portion of the fracture and form a high-density proppant pack; and f) allowing the low-density proppants to migrate to the upper portion of the fracture and form a low-density proppant pack,