计算力学学报2025，Vol.42Issue(5)：765-771,7.DOI:10.7511/jslx20240408001
两流体模拟中固相应力对支撑剂堆积的影响研究
Influence of solid stress on proppant accumulation in two fluid modelling
摘要
Abstract
Proppant transport in fractures is essentially a dense granular flow in a slot-shaped space.Applying the two-fluid method in numerical simulations of a field-scale particle flow is promising,but existing solid stress models cannot accurately describe the process of proppant accumulation.In this paper,the morphological change of a proppant pack under flow erosion was analyzed experimentally,and the important influence of cohesion on the change of the pack state was pointed out.Then,combined with the simulated results of a proppant transport and the results of a suspension apparent viscosity test,the influence of the particle radial distribution function on the solid kinetic pressure and the change trend of total solid pressure were analyzed,and the change rate of the solid friction pressure with the particle volume fraction was determined.Based on the granular matter theory and results of a direct shear test,the cohesion of the proppant pack was considered in the frictional viscosity model.The results show that the improved solid friction stress model can capture larger angles of the accumulation and settlement profiles,and correctly simulate the process of proppant accumulation.关键词
滑溜水压裂/支撑剂堆积/两流体法/径向分布函数/固相摩擦应力Key words
slickwater fracturing/proppant pack/two-fluid method/radial distribution function/solid friction stress引用本文复制引用
周航宇,郭建春,张涛,陈伟华,陈一鑫,曾冀..两流体模拟中固相应力对支撑剂堆积的影响研究[J].计算力学学报,2025,42(5):765-771,7.基金项目
国家自然科学基金联合基金(U23B6004)资助项目. （U23B6004）
