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The mobility of a polymer solution is a strong function of its environment. The ionic composition of a petroleum reservoir brine determines the conformation that the polymer chains assume in it. Since the reservoir brine contains many mono and bivalent cation salts, knowing how the mobility of the injected polymer solution changes as a function of ion concentrations is very important in designing the polymer flooding project and in selecting the proper polymer which will lead to better oil recovery. Part one of this investigation presents experimental results of the effects of salt concentration on the solution of a polymer commonly used for enhanced oil recovery projects. This polymer is a partially hydrolyzed polyacrylamide (HPAM) which has a trade name J333. polyacrylamide (HPAM) which has a trade name J333. Introduction
One of the main problems encountered in simple water flooding is related to "fingering" of the injected water through the oil zone resulting in premature breakthrough of the producing wells. As a result of this phenomenon, most of the oil remaining in the low permeability zones is phenomenon, most of the oil remaining in the low permeability zones is bypassed and the sweep efficiency decreases to the point where the water flooding project is no longer economically feasible.
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