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科技导报  2015 

纤维压裂液携砂性能实验评价

DOI: 10.3981/j.issn.1000-7857.2015.07.006, PP. 39-42

Keywords: 纤维加砂压裂,纤维加入方式,纤维浓度,砂堤,可视裂缝模拟系统

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Abstract:

为了研究纤维对纤维加砂压裂的影响,设计了大型可视裂缝模拟系统及相应的实验方案,通过室内实验,研究了纤维加入方式、纤维浓度、温度等对纤维携砂能力的影响。实验结果表明先加入纤维,再加入交联剂,最后加入支撑剂配置的压裂液携砂能力最好;在一定温度范围内,纤维质量浓度越高,纤维与支撑剂颗粒间摩擦系数越大,形成的网状结构越稳定,纤维的悬砂性越好,但温度大于80℃时,纤维携砂能力变差;增大纤维质量浓度,砂堤形态变平缓,堤峰向裂缝深部推移,支撑剂在裂缝深部的沉降量增加,有利于增加裂缝的有效长度。

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