丙烯酰胺-双丙酮丙烯酰胺自交联聚合物凝胶的研究

Investigation of Acrylamide and Double Acetone Acrylamide Self-Crosslinkable Polymer Gelation

苟绍华[] 封明明 叶仲斌 刘 曼 赖南君

GOU Shao-Hua FENG Ming-Ming YE Zhong-Bin LIU Man LAI Nan-Jun

用丙烯酰胺(AM)、双丙酮丙烯酰胺(DAAM)中间体噁嗪硫酸盐制备了一种对环境友好的二元自交联凝胶。最佳合成条件为：AM 5%，DAAM中间体噁嗪硫酸盐0.8%，引发剂0.8%，pH值为8，温度50℃。未成胶前溶液的黏度约15 mPa·s，注入性良好；聚合物成胶时间可以控制在1~3 d，凝胶耐温可达60℃，成胶后的凝胶强度在 I 级下可保持1 d。60℃下的岩心封堵实验表明，该凝胶具有较高的封堵率（93.50%~99.71%）和突破压力梯度（31.25~58.61 MPa/m）。

An environment-friendly self-crosslinkable polymer gel was prepared utilizing acrylamide (AM) and double acetone acrylamide (DAAM) oxazine sulfate. The optimum syntheses condition was obtained as follows: 5% AM, 0.8% DAAM oxazine sulfate, 0.8% initiator, 8 pH value and 50℃ reaction temperature. The viscosity of solution before gelling was about 15 mPa·s which indicated good injection. The gelation time could be controlled by 1—3 days. Meanwhile, the high gel strength (I grade) of binary crosslinkable copolymer kept 1 days at 60℃. Core plugging experiment results showed that the blocking rate of water was between 93.50% and 99.71%, and breakthrough pressure gradient was in a range of 31.25—58.61 MPa/m.