Research on the Cuttings Transport in Large-Sized Hole Based on CFD-DEM Method

计算流体力学 切割 地质学 计算机科学 航空航天工程 工程类 植物 生物
作者
Jun Zhao,Wenjun Huang,Deli Gao
标识
DOI:10.56952/arma-2024-0086
摘要

ABSTRACT: During drilling large-sized hole, due to the low return velocity of the drilling fluid and weak cuttings transport effect, it is difficult to clean the borehole, resulting in serious backpressure even pipe sticking, high equivalent circulating density (ECD), low rate of penetration (ROP), etc., which will bring significant time costs and economic losses. In this paper, a CFD-DEM coupling model is built to accurately simulate the dynamic transport process of cuttings. For the liquid phase, the Euler method is used to describe its motion characteristics through the flow field. For the solid phase, the Lagrange method is used to solve the variation of physical quantities of cuttings over time. And the coupling of fluid and solid phase is achieved through mutual forces. The reliability of this CFD-DEM coupling model is validated through experiments. Based on a large number of numerical simulations and the nonlinear regression method, a data-driven mathematical model for predicting the cuttings bed height is developed, which is useful in hole-cleaning design and drilling parameters optimization. The Pearson correlation coefficient R2 is 0.893451, indicating high accuracy of this mathematical model. 1. INTRODUCTION Hole cleaning is one of the major challenges during drilling large-sized hole section, especially in the horizontal sections. Under the effect of gravity, cuttings will accumulate at the bottom of the annulus and be transported upwards in the form of cuttings bed. However, if the cuttings bed is too high, the cuttings in the lower part of the cuttings bed will be stuck and unable to move, resulting in the stationary bed that is difficult to remove and poor hole cleaning. This may cause downhole complications and accidents, such as serious backpressure even pipe sticking, high ECD, low ROP, etc., which bring significant time costs and economic losses. Therefore, conducting research on cutting transport is of great significance for on-site operations. In the past, many researchers have conducted a large number of studies on cuttings transport, including experiments, numerical simulation and theoretical modeling. Experimental studies on cuttings transport began in the 1940s (Zhu 2022), analyzing the influence laws of various parameters through measured results and observation of phenomena. Sorgun (2013) summarized an empirical formula for the height of cuttings bed under water and four non-Newtonian fluids. Kim et al. (2014) studied the transport characteristics of cuttings in inclined annulus with the inclination of 30-75°. Song et al. (2017) proposed a mathematical model for cuttings concentration in a Microhole-Horizontal-Well based on 136 sets of experiments. Through massive experiments, Huque et al. (2022) believed that fluid velocity and cuttings size were the two most key parameters for cuttings transport efficiency in an inclined well.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
原子发布了新的文献求助10
刚刚
情怀应助朱之欣采纳,获得10
1秒前
昵称有敏感词完成签到,获得积分10
1秒前
韩凡发布了新的文献求助30
3秒前
Chemistry完成签到,获得积分10
3秒前
wwqq完成签到,获得积分10
3秒前
min发布了新的文献求助10
4秒前
4秒前
矮小的尔曼完成签到,获得积分10
4秒前
甲基绿完成签到,获得积分20
5秒前
5秒前
Jiancui发布了新的文献求助10
6秒前
戚雅柔完成签到 ,获得积分10
6秒前
6秒前
6秒前
干净的小懒虫完成签到,获得积分10
7秒前
mostspecial发布了新的文献求助10
9秒前
猪猪hero应助wjx采纳,获得10
9秒前
情怀应助YYQX采纳,获得10
10秒前
追寻奄发布了新的文献求助10
10秒前
vee完成签到 ,获得积分10
10秒前
ChenYX完成签到,获得积分10
10秒前
badada发布了新的文献求助10
10秒前
10秒前
10秒前
yuhang完成签到,获得积分10
11秒前
CodeCraft应助空溟fever采纳,获得10
11秒前
原子完成签到,获得积分10
12秒前
12秒前
芽芽豆完成签到 ,获得积分10
15秒前
大力的图图完成签到,获得积分10
15秒前
15秒前
15秒前
16秒前
16秒前
17秒前
17秒前
我是老大应助就是嘀咕采纳,获得10
19秒前
SYLH应助yuko采纳,获得10
19秒前
开朗的钻石完成签到,获得积分10
20秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3975250
求助须知:如何正确求助?哪些是违规求助? 3519625
关于积分的说明 11199055
捐赠科研通 3255962
什么是DOI,文献DOI怎么找? 1798001
邀请新用户注册赠送积分活动 877358
科研通“疑难数据库(出版商)”最低求助积分说明 806298