Patent ID: 8776882
Filing Date: 2014-07-15
Classification: C04B,C09K,E21B

Abstract:
1. A method for blocking fluid flow through a pathway in a subterranean formation penetrated by a wellbore, comprising: (i) selecting compositions, concentrations and dimensions of at least two fibers, at least one of them being a stiff fiber and solid plugging particles; (ii) preparing a blocking fluid comprising the stiff fiber and a blend of the solid plugging particles; and (iii) forcing the blocking fluid into the pathway, wherein the stiff fibers have a value of the parameter where S is the stiffness, E is Young's modulus, d is the diameter, W is the force causing a deflection, and l is the length; and the value of S is about 2 to about 400,000 times that of a fiber having a modulus of 65 GPa, a diameter of 20 microns, and a length of 12 mm.