针对该储层物性差、泥质含量高、水敏性强、水基压裂液对储层伤害严重等特点,对CO2泡沫压裂技术进行相应的改进,取得了较好效果。与常规水基压裂技术进行压后评价对比分析,结果表明,CO2泡沫压裂技术具有更好的效果,主要表现在返排速度快、返排率高、压裂液绝对残渣含量低、地层伤害小、增产效果好,压后地层完善程度高。因此得出结论,CO2泡沫压裂技术对大庆长垣西南扶杨油层具有较好的适应性,应用效果显著。 Aiming at the characteristics of poor reservoir property, high mud content, strong water sensitivity and serious damage to the reservoir by water-based fracturing fluid, the CO2 foam fracturing technology is improved correspondingly and good results are obtained. Compared with the conventional water-based fracturing technology, the results of pressure post-evaluation show that the CO2 foam fracturing technology has better effect, which is mainly reflected in the high back flow rate, high backflow rate, low absolute residual fluid content in the fracturing fluid, Damage is small, the effect of increasing production is good, the degree of formation stratification is high after pressure. Therefore, it is concluded that the CO2 foam fracturing technology has a good adaptability to the Fuyang Changyuan southwestern Fuyang oil reservoir, and the application effect is remarkable.