Keywords demulsifier;tricomponent combination;synergists;inorganic salts;watercut crude oil;dehydration;weak gel flooded reservoir;Zhaozhouqiao oil field in Huabei;

• 破乳剂;嵌段聚醚;三元复配物;增效剂;无机盐;含水原油;脱水;弱凝胶驱油藏;华北赵州桥油田;