In hydraulic fracturing of coal bed methane, any compounds that enter into the coal seam would do harm to the coal formation with varying degrees. In addition, since the coal formation is soft and frail, the coal formation will be broken easily in the process of hydraulic fracturing, and the field operation will become more difficult to continue. In order to decrease the harm, the possibility of being broken by outside forces on coal bed is reduced, and increased fracturing efficiency. One new type of clean fracturing fluid is developed by laboratory experiments and studies in this text. This new type of clean fracturing fluid has the network structure associated with small molecular surfactant placed in some certain solution medium. This new clean fracturing fluid not only can meet the clean requirements, but also can do negative harm to the coal seam and improve the permeability of coal formation. These advantageous characters specially belong to this new type of clean fracturing fluid, and also are the distinct differences from other clean fracturing fluids. The new fluid has a high anti-swelling rate of 94. 72% , and it can solve part of organic materials in coal. This new type of fracturing fluid was applied in 10 wells of coal bed methane, and operations succeeded 100% , these results show that this fracturing fluid has an excellent effect and a forthcoming applicable future.%在煤层压裂中,任何进入煤层的化合物都会对煤层造成不同程度的伤害.另外,由于煤层较松软、脆性强,在压裂施工中受到外力容易造成整个煤层粉碎,施工难度增大.因此,为了降低伤害,减少煤层受外力容易粉碎的几率,同时提高压裂增产效果,通过室内实验,研究开发出一种新型清洁压裂液.它是由小分子表面活性剂在一定溶液介质中相互缔合形成的网络结构.试验结果表明这种新型清洁压裂液不仅完全达到了清洁的要求,而且对煤层是负伤害.能有效地改善煤层,并在现场施工中取得了良好的压裂施工效果.其防膨率高达94.72％,并且能够溶解煤层的部分有机物质.这些优良性能是这种新型清洁压裂液所特有的,也是明显与其他清洁压裂液的不同之处.通过使用这种新型清洁压裂液现场施工10口煤层气井,100％成功,开发的新型清洁压裂液具有很好的应用效果和前景.
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