针对六东区克下组稠油油藏的地质特征，在蒸汽吞吐开采之前，开展了防缩膨实验研究。 以储层敏 感性评价、防缩膨剂优选及静态性能评价结果为依托，通过对防缩膨剂耐温性能的评价和岩心流动等实 验，确定了防缩膨周期、处理半径及现场注入程序。 研究表明：适用于六东区克下组的最佳防缩膨剂分 别为质量浓度为 1% 的 HCS-G 和质量浓度为 1% 的 EXHCS，均可耐 230 ℃ 高温，能满足现场蒸汽吞吐 要求；确定防缩膨处理半径为 3.5 m，防膨周期约为 2 年，缩膨周期约为 1 年，并设计了现场注入程序。

Based on geologic characteristics of Kexia heavy oil reservoir, research on shrink-proof expansion treatment was carried out before huff and puff test. Combined with the results of reservoir sensitivity evaluation, shrink-proof expansion optimization and static performance evaluation, through the research of temperature resistance performance and core flow experiments, this paper determined the anti-swelling cycles, treatment radius and injection program on site. The results show that the favorable anti-swelling agents are 1% HCS-G and 1% EXHCS, they are resistant to high temperature of 230 ℃, and can meet the requirements of steam stimulation; The shrink-proof treatment radius is 3.5 m, the anti-swelling cycle is about 2 years, and shrinkage and expansion cycle is about 1 year. And this paper also designed the injection program on site.