FLUID LOSS FROM HYDRAULICALLY INDUCED FRACTURES

Abstract

Fluid loss experiments were conducted in which the initial rate of fluid flow into a test %core was restricted while fluid containing additive was circulated past the core surface. These '%'dynamic fluid loss experiments'%' are believed to approximate closely the conditions existing during hydraulic fracturing. Included are data on the properties of commonly used additives, presented in the form of curves showing effects of additive concentration, leakoff velocity, flow velocity past the core surface, oil viscosity, and formation permeability. Data are included for silica flour in gwlwdd water, an oil-soluble additive in gelled water, and a granular solid additive in oil.