Past production results after acidizing treatments on oil and gas wells have been unsatisfactory in many areas due to the use of conventional acid mixtures along with inadequate lab testing and design procedures. This paper presents a means of acid-oil emulsion and sludge testing analogous to downhole conditions which appears to be a key element to effective acidizing designs. This study produces improved techniques for testing, design, quality control, and evaluation of such treatments. Production results authenticate the success of these advanced quality control and design measures.

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