摘要:1.CO2压裂技术工艺原理及特点 CO2压裂液是由液态CO2、原胶液和各种化学添加剂组成的混合液,该混合液向井下注入过程中温度逐渐升高,CO2开始汽化,形成气液两相混合液(即CO2为气相,原胶液为液相),其携砂性能取决于气泡稠密结构,在该结构中,各个气泡都影响其它气泡的流动性,从而使泡沫具有粘度,因而具备压裂液的特性.分析CO2特性及其增产机理,主要表现在以下几方面:
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