Abstract
Injection of Partially Hydrolyzed Polyacrylamide gels using inorganic crosslinking agents has proven to be one of the best methods for isolating water and enhancing oil recovery. Partially hydrolyzed polyacrylamide forms a gel structure in the presence of trivalent metal ions such as Cr3+, Al3+, which act as a crosslinker. In this case, a sequential injection of a polymer solution and a crosslinking agent is carried out into the formation and the gel is formed directly in the formation. Numerous successful examples of the implementation of this technology to reduce the water cut of the produced products were the basis for the development of a new gel composition, taking into account the disadvantages of the existing ones. The paper presents the results of laboratory studies on core material using the proposed gel composition based on a partially hydrolyzed polyacrylamide polymer and various crosslinking agents (note: thiourea / K2Cr2O7).
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