Keywords surfactant/biopolymer flooding solution;natural mixed carboxylates;alkyl sulfo betaines;xanthan;slug structure;pilot flood trial;Huzhuangji oil field in Zhongyuan;

• 表面活性剂/生物聚合物驱油剂;混合天然羧酸盐;烷基磺基甜菜碱;黄胞胶;段塞结构;先导驱油试验;中原胡状集油田;