关键词: 加砂压裂,  , 产量预测,  , 非达西流,  , 气水同产,  , 裂缝导流能力

Abstract: The conductivity of artificial fractures and coefficient of nonDarcy gas flow in gas wells are affected by many factors. It is difficult to predict them accurately through mathematical methods. To get a more accurate value through the experiments of actual fracture conductivity, laboratory tests are conducted to measure fracture permeability and nonDarcy flow coefficient βunder different conditions. Computational formula of productivity based on the experimental data is established and the influential factors of the production of the artificial fractured gas well are studied. The results show that closure pressure and sanding concentration are the most important factors affecting the productivity and that gaswater production will greatly decrease the productivity of the gas well. The optimization methods in fracturing design based on the experimental data is set, that is: obtaining fracture permeability and nonDarcy flow coefficient β under different conditions through nonDarcy flow experiments and twophase flow experiments, and then using them to forecast the productivity of fractured gas well, finally optimizing the fractured length, sanding concentration and other parameters accordingly. 

Key words: Artificial fracture,    , Productivity evaluation,    ,  NonDarcy flow,    ,  Gas production with water,    , Fracture conductivity