【作者】 王京平； 储明熙； 冯培超； 马海春； 钱家忠；

【Author】 WANG Jing-ping;CHU Ming-xi;FENG Pei-chao;Ma Hai-chun;QIAN Jia-zhong;School of Resources and Environmental Engineering,Hefei University of Technology;

【机构】 合肥工业大学资源与环境工程学院；

【摘要】 相比于经典的单裂隙渗流研究,水力压裂裂隙中的渗流具有较高的实用价值和意义。由于真实的地下水流动及相应的溶质运移处于广泛且复杂分布的地应力条件的作用下,在实验室研究中对不同围压下的渗流的相关研究显得尤为必要。在实际的地下水污染防治等工程实际中,裂隙的渗透率受到了围压的显著影响。本研究以基础的本构方程为出发点,对围压作用下的渗流进行了定量的分析。基于水力开度的变形和单个结构面闭合变形法则,建立考虑围压下水力压裂裂隙的渗透率k和围压P_c的关系模型。在岩心夹持器中进行了泥质页岩的水力压裂裂隙的水力实验,并对试验数据进行了回归分析。经验证,该模型具有较高的拟合效果。更多还原

【Abstract】 Compared with the classical study of seepage in a single fracture,the seepage in hydraulic fracturing has higher practical value and significance.As the real groundwater flow and the corresponding solute transport are under the action of extensive and complex in-situ stress conditions,it is particularly necessary to study the seepage under different confining pressure in the laboratory.In the actual engineering practice,such as the prevention and control of groundwater pollution,the permeability of the fracture is significantly affected by the confining pressure.In this paper,based on the basic constitutive equation,the seepage under confining pressure is analyzed quantitatively.Based on the deformation of hydraulic opening and the closed deformation law of fracture,the relationship between permeability k and confining pressure Pc of hydraulic fracturing fracture under confining pressure is established.The hydraulic experiments of hydraulic fracturing fractures of argillaceous shale were carried out in the core holder,and the test data were analyzed by regression.It is proved that the model has high fitting effect.更多还原