Against the backdrop of implementing integrated hydraulic fracturing on coal measure gas (CMG) reservoirs, fluids can flow through interlayer fractures during drainage stage, resulting in fluid interlayer crossflow (IC). However, its impact on CMG development and the controlling factors remain unclear. This paper employs numerical simulations to investigate these issues. The results indicate that fluid IC through fractures leads to more evenly distributed pressure drops among layers with varying permeabilities. Fluid consistently migrates from a low-permeability layer to a high-permeability layer, resulting in higher production rate from the latter. Additionally, as fluid IC diverts between high- and medium-permeability layers in the early stage of drainage, the production rate of medium-permeability layers tends to increase. In general, fluid IC promotes CMG well production but its impact varies throughout the drainage process. Fluid IC is influenced by both geological and technical factors. Specifically, changes in initial reservoir pressure have a negligible impact on the promotion effect of fluid IC on total production. However, the promotion effect is enhanced as the permeability of high-permeability reservoirs increases, as the distance between fluid IC channel and wellbore increases, and as the permeability, elasticity, and drainage intensity of low-permeability reservoirs decrease. Based on these findings, the implications of fluid IC for CMG efficient development are demonstrated, and suggestions for optimizing the development technology are proposed.Please check and confirm the corresponding author affiliation is correctly identified.The corresponding author affiliation is correct.

在煤系气藏实施一体化水力压裂的背景下，流体在排水阶段可以穿过层间裂缝，导致流体层间错流（IC）。然而，其对CMG发展的影响及其控制因素仍不清楚。本文采用数值模拟来研究这些问题。结果表明，通过裂缝的流体 IC 导致具有不同渗透率的层之间的压降分布更均匀。流体不断地从低渗透率层迁移到高渗透率层，从而导致后者的生产率更高。另外，由于排油初期流体IC在高渗透层和中渗透层之间分流，中渗透层的产量有增加的趋势。一般来说，流体 IC 可以促进 CMG 井的产量，但其影响在整个排水过程中会有所不同。流体 IC 受到地质和技术因素的影响。具体而言，初始地层压力的变化对流体IC对总产量的促进作用影响可以忽略不计。但随着高渗透油藏渗透率的增大、流体IC通道与井筒距离的增大以及低渗透油藏的渗透率、弹性和排油强度的降低，促进作用增强。基于这些发现，论证了流体IC对CMG高效开发的影响，并提出了优化开发技术的建议。请检查并确认正确识别了相应的作者单位。相应的作者单位是正确的。