Abstract
Polyacrylamide and water-soluble phenol-formaldehyde resin can produce crosslinking reaction to generate the movable gel, which can be used in deep profile control to enhance oil recovery. In this paper, the preparation process of water-soluble phenol-formaldehyde resin crosslinking agent (polyhydroxymethyl phenolic) was presented, including the raw material mixture ratio and synthesis process. The water-soluble phenol-formaldehyde resin was synthesized by the technology of two-step base catalysis with NaOH and Ba(OH)2•8H2O composite catalyst. The movable gel prepared with this crosslinking agent and polyacrylamide has good stability and long shelf life through the performance evaluation experiment. The above movable gel was applied to deep profile control and obtained better flooding efficiency.
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