Abstract
Be aimed at the characteristics of high temperature-salinity and severe heterogeneity of Bohai oilfield. This paper studies three different strength kinds of polymer gel profile control agents. Use storage modulus evaluates strength of polymer gel. the result indicate that the storage modulus of weak gel is between0.1 Pa and 1.0 Pa, the storage modulus of moderate gel is between1.0 Pa and 3.1 Pa, the maximal value of powerful gels storage modulus is11.9 Pa during 90 days. Core laboratory findings indicate that these different strength kinds of polymer gel have well formation sealing quality and endure washing out quality,40PV by water erosion , the formation sealing rate is up 90%.the experiment result of water shutoff and flooding oil indicate that the EOR is13.44% in heterogeneity core.
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