页岩单轴压缩破坏试验的光纤布拉格光栅测试技术研究

发布时间：2018-03-06 22:03

本文选题：页岩　切入点：光纤布拉格光栅　出处：《岩土力学》2017年08期 　论文类型：期刊论文

【摘要】：由于化石能源工业的不断发展及其大量燃烧造成的严重环境污染问题等原因,促使页岩气逐渐成为绿色革命的关键能源组成之一。四川盆地龙马溪组是我国页岩气主力开采层位,在页岩气开采过程中,针对储层变形监测将有利于指导现场页岩气开采方案和安全风险管理等工作。光纤布拉格光栅测量应变的方法是近年来被广泛使用的一种新颖先进的实时应变监测技术,研究将其运用于页岩单轴压缩试验并对页岩表面应变进行监测。结果表明:(1)光纤布拉格光栅能够较好地监测页岩表面应变变化且环向应变传递效率高于轴向;(2)光纤布拉格光栅测试结果优于十字应变花,但轴向应变变化极易受表面裂缝发育影响而导致较低传递效率;(3)光栅传递效率受光栅本身力学性质、粘贴层性质及厚度等因素影响。从试验选择的两种环氧树脂黏胶对比试验结果中可知,新型555黏胶效果更佳。
[Abstract]:As a result of the continuous development of the fossil energy industry and the serious environmental pollution caused by its massive combustion, The Longmaxi formation in Sichuan Basin is the main mining horizon of shale gas in China. Reservoir deformation monitoring will be helpful to guide shale gas production and safety risk management. Fiber Bragg grating (FBG) method for strain measurement is a novel and advanced real-time strain monitoring technique widely used in recent years. The results show that the fiber Bragg grating (FBG) can better monitor the variation of shale surface strain and the circumferential strain transfer efficiency is higher than that of axial strain transfer efficiency. The fiber Bragg grating is superior to the cross strain pattern. However, the variation of axial strain is easily affected by the growth of surface cracks, which results in a lower transfer efficiency. The transfer efficiency of the grating is affected by the mechanical properties of the grating itself. The effect of the properties and thickness of adhesive layer on the properties and thickness of the adhesive layer was studied. The results of comparison of the two kinds of epoxy resin viscose showed that the new type 555 viscose had better effect.
【作者单位】：中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室;中国科学院大学;安徽理工大学地球与环境学院;
【基金】：中国自然科学基金面上资助项目“酸气-咸水作用下岩石特异性破坏机理研究”(No.41274111)~~
【分类号】：TE311

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