新型纳米复合纤维基清水压裂液体系配方优化与评价

页岩气藏储层具有不同于常规油气储层的岩性和物性特征。选择适合的压裂液体系对于页岩气藏的高效开发具有重要意义。基于新型纳米复合纤维,研究了纳米复合纤维基清水压裂液体系。通过实验确定纤维的最佳质量分数为0.4%~0.7%,最佳长度为6~12 mm。对纳米复合纤维基清水压裂液体系开展了室内评价,结果显示此压裂液体系在预防支撑剂回流、降低滤失、增强携砂性能、降低摩阻等方面效果显著;且对支撑剂层的导流能力伤害较小。此体系对于国内页岩气储层的有效开发具有一定参考价值。

Laboratory optimization and evaluation of a novel nano-composite fiber laden slickwater

Shale gas reservoirs are different from the conventional oil and gas reservoirs in lithology and physical characteristic, so choosing a proper fracturing fluid system has a decisive role for the efficient development of shale gas reservoirs. Based on the novel nano-composite fiber, this paper carried out the study of the nano- composite fiber laden slickwater system. The length and concentration of nano-composite fiber was determined through laboratory experiments. Combined with the optimization results of various additives, fracturing fluid formulations was established. According to the all-round evaluation of nano-composite fiber laden slickwater in the labraroty, it has remarkable effect on prevent proppant flowing back, lowering the fluid filtration. Meanwhile, this system can enhance the capacity of proppant -transporting and reduce the string friction during the pumping process. The results also illustrate that this novel fracturing fluid system has little influence toward the conductivity of proppant pack. This job has a reference value for the effective development of domestic shale gas reservoirs.