在天然气开采过程中，总有如地层砂等固体颗粒随采出气采出，较大的颗粒可被除砂装置去除，而微米级颗粒容易随气体流入集输管道内，进而发生沉积，对管道运行安全造成影响。为探究天然气集输管道内微米级固体颗粒的沉积规律，利用计算流体力学（CFD）软件，通过自定义函数定义临界沉积速度和恢复系数，分析沉积规律，并使用响应曲面法拟合出了沉积率与各影响因素间的关系式。结果表明：在流速变化时，小粒径和大粒径颗粒的沉积率变化趋势相反；在流速保持不变时，虽然沉积率的变化趋势相同，但较大流速下大粒径颗粒沉积率约为40%，较小流速下大粒径颗粒沉积率可达到70%。此外，不同管道形状下颗粒的沉积位置也表现出显著的差异性。最终通过响应面法的分析，确定了对沉积率影响较大的因素包括管道后段的坡度和颗粒的粒径。

During natural gas exploitation, solid particles such as formation sand are inevitably produced alongside the extracted gas. Larger particles can be removed by the separators, however, micron-sized particles easily enter the gathering and transportation pipelines with the gas, resulting in deposition that poses significant risks to pipeline operational safety. The computational fluid dynamics (CFD) was used to investigate the deposition behavior of micron-sized solid particles within natural gas pipelines. User defined functions were developed to specify critical deposition velocity and restitution coefficients, particle deposition behavior was analyzed, the response surface methodology (RSM) was utilized to establish quantitative relationships between deposition rates and influencing factors. The findings reveal contrasting deposition rate trends for small and large particles under varying flow velocities. Under constant flow velocity, deposition rates exhibit similar trends, with large particles showing deposition rates of approximately 40% at higher flow velocities and up to 70% at lower flow velocities. Furthermore, significant differences are observed in particle deposition locations across various pipeline geometries. Finally, the RSM analysis identified the slope of the downstream pipeline section and particle size as critical factors influencing deposition rates.