The formation, storage and seepage characteristics of shale gas reservoirs are significantly different from those of conventional oil and gas reservoirs, and their in-depth study is extremely important for improving energy security and promoting sustainable development. In this paper, based on the nonlinear seepage theory of shale gas reservoirs and the capacity analysis of test wells, a steady state capacity model integrating the apparent permeability model and the multi-scale transport mechanism is constructed to investigate the influence of various factors on the apparent permeability and the capacity of shale gas fractured horizontal wells, as well as to predict the production of shale gas wells. It is found that: apparent permeability is significantly affected by pore radius, and the non-Darcy effect is particularly significant under low-pressure and small-scale pore conditions; when the reservoir pressure is lower than 15 MPa, the sensitivity of apparent permeability to temperature and Langmuir volume increases, but decreases with the increase of Langmuir pressure; and the production capacity analysis of shale gas reservoirs shows that the production rates of fractured wells that consider the multiscale transport mechanism are generally higher than those considering Darcy flow only, especially in the case of low wellbore pressure and large pore radius; the effects of Langmuir volume and pressure on the production capacity are relatively small, and mainly noticeable in the range of wellbore flow pressure from 1 MPa to 15 MPa. The number of fracture bars has a significant effect on production, but too many fractures can lead to gap interference, which slows down production growth. The results of this research provide theoretical support for the scientific development of shale gas reservoirs and have important research and application value for the efficient and rational development of actual well sites.

页岩气藏的形成、储存和渗流特征与常规油气藏显着不同，其深入研究对于提高能源安全、促进可持续发展极为重要。本文基于页岩气藏非线性渗流理论和测试井产能分析，构建了视渗透率模型和多尺度输导机制相结合的稳态产能模型，研究了各种因素对页岩气储层表观渗透率和页岩气压裂水平井产能，以及预测页岩气井产量。研究发现：表观渗透率受孔隙半径影响显着，且在低压、小尺度孔隙条件下非达西效应尤为显着；当地层压力低于15 MPa时，视渗透率对温度和Langmuir体积的敏感性增大，但随着Langmuir压力的增加而减小；页岩气藏产能分析表明，考虑多尺度输导机制的压裂井产能普遍高于仅考虑达西流的压裂井产能，特别是在井筒压力较低、孔隙半径较大的情况下； Langmuir体积和压力对产能的影响较小，主要在井筒流压1 MPa～15 MPa范围内较为明显。裂缝条的数量对产量有显着影响，但裂缝过多会导致间隙干扰，从而减慢产量增长。该研究成果为页岩气藏的科学开发提供了理论支撑，对于实际井场的高效合理开发具有重要的研究和应用价值。