基于PFC-CFD耦合的发泡泥浆渗流数值模拟研究

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中图分类号：TU43 文献标识码：A

Abstract： Based on the PFC3D software， a one-dimensional foam mudstone seepage model was established， and the fluid-solid coupling simulation was carried out. The dynamic adjustment of bubble particle size was realized through the FISH function. In addition， a continuous grouting algorithm was developed， and the uniformity and continuity of mudstone distribution were verified. The seepage process of foam mudstone in soil layers was successfully simulated. Regarding the problem that the formation time of mud film is difficult to determine， three types of calculation termination conditions were proposed. By comparing the results of indoor experiments and numerical simulations， the rationality of the model was verified.

Key words： foamed mud; PFC3D; fluid-solid coupling; seepage; model parameters

发泡泥浆是一种轻质泥浆，其黏度和切力大，最早应用在气钻探工程[1]，多用于低压高渗透性地层，可起到防止钻井护壁泥浆泄漏和保护油气层的作用[2-3]。（剩余11398字）