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A low damage frac fluid LMWF
Author(s): 
Pages: 41-42
Year: Issue:  6
Journal: DRILLING FLUID & COMPLETION FLUID

Keyword:  压裂液瓜尔胶防止地层损害增产措施;
Abstract: 介绍了一种低伤害LMWF压裂液,它用改性的低分子量瓜尔胶配成基液,经硼交联得到LMWF压裂液.该体系不用破胶剂,靠pH值变化自动破胶,因而减少了不溶性残渣,避免了对储层的伤害,提高了地层渗透率.对该体系的流变性、破胶性和再循环使用性的评价表明,该体系具有良好的携砂性能、长时间的流变稳定性;由于不含破胶剂,LMWF压裂液稳定,能长时间泵送;当压裂作业完成后,pH值降低,当pH值低于8时低分子量聚合物凝胶的交联性能随即丧失,压裂液恢复到起始的低粘度,使LMWF压裂液能迅速彻底地从裂缝中返排.应用表明,LMWF压裂液对地层伤害小,携砂性能好,提高了产油量.该体系可循环使用,节约了成本,保护了环境.
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