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一种新型酸性交联CO2泡沫压裂液研制及应用

Drilling Fluid & Completion Fluid(2014)

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Abstract
针对延长气田低渗透储层,通过制备交联剂、起泡剂、助排剂,筛选黏土稳定剂等酸性压裂液添加剂,研制出了一种以CMHPG作为稠化剂的酸性交联CO2泡沫压裂液,并对压裂液的相关性能进行了评价.实验结果表明,压裂液的泡沫质量为79.59%,半衰期为110 min;压裂液破胶液的黏度为1.19 mPa·s,残渣含量为273 mg/L,防膨率为90.61%,表面张力为24.51 mN/m,在80℃下滤失速率为9.8×104 m/min1/2,对储层的伤害率小于19.79%.该压裂液泡沫质量高,破胶彻底,残渣较低,防膨效果显著,对储层伤害小,现场应用携砂性能好,增产效果明显.
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