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Fluid behavior in reservoirs has become more complex due to the injection of chemicals in the reservoirs of Daqing. The dynamic connectivity between injection and production wells formed by waterflooding has changed significantly due to the use of chemical solutions. In this article, an improved Grey relation analysis (IGRA) method is introduced to predict the dynamic connectivity between injection and production wells and to estimate the effects of connectivity changes. An application was carried out for a polymer flooding pilot. The dynamic connectivity changes are demonstrated by comparing the results of both the water- and chemical flooding prediction results with IGRA, Tracer tests have been conducted for both water- and chemical flooding to prove the accuracy of predictions.
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Gao et al. (2013) studied this question.
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