Abstract
ABSTRACT In recent years, gyp (calcium sulfate) scale removal techniques have become increasingly complex and the number of fluids and additives have continually grown. The purpose of this paper is to provide the field engineer with the fundamental understanding of the calcium sulfate removal procedures and the roles different fluids and additives play in this process so that a more cost effective treatment can be planned. Cost effectiveness can be achieved by minimizing the number of treatment phases necessary to complete a chemical calcium sulfate scale removal treatment. Also, the success of the treatment can be enhanced by minimizing residual chemical compounds left in the formation.
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