DESIGN CRITERIA FOR MATRIX STIMULATION WITH HYDROCHLORIC- HYDROFLUORIC ACID

Abstract

Matrix stimulation with hydrochloric-hydrofluoric acid mixtures is a successful technique for improving well performance. However, little is known about this complex stimulation mechanism. A high- pressure, high-temperature acid permeameter constructed to investigate the reaction of HCl-HF on sandstone cores at reservoir conditions is providing new insight into the reservoir and treatment variables that control the acidizing process.