Study of gelled polymer system used for temporary plugging of oil well in workover operation for low pressure and unstable production wells
Abstract
Many methods are used to prevent fl uid losses in low pressure and unstable production wells during temporary shut-in for well workovers. Among these, polymer gels are usually used in stimulation and workover operation. They can plug channels and perforated entrance holes, block producing intervals as well as prevent fl uid movement into reservoirs. This technological solution allows control of wells with low reservoir pressure [1, 2] and rapid movement of downhole equipment, tubing and drilling pipes within well bores.
Multi-component polymer gel system can be fl exible to fit each purpose such as temporary plugging of selected producing intervals and reducing formation damages. This article presents the study results of using polymer gel system to temporarily shut-in low pressure and unstable production wells during workovers.
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