Investigating Grain Size Influence on the Stress-Dependent Permeability of Porous Rocks Using Particulate Discrete Element Method

磁导率 材料科学 多孔性 岩土工程 离散元法 压力(语言学) 粒度 机械 多孔介质 地质学 复合材料 化学 生物化学 物理 语言学 哲学
作者
Prasad Pothana,Ghoulem Ifrene,Kegang Ling,Fernando E. Garcia
标识
DOI:10.56952/arma-2023-0827
摘要

ABSTRACT Reservoir in-situ stresses continuously evolve during the reservoir life cycle because of the production of hydrocarbons, injection of water and CO2 for enhanced oil recovery, storage of CO2, and nuclear waste disposal. The induced changes to the stress state deform the reservoir rock, including the pores and fractures in the rock, and hence change the permeability of the rock. Studies demonstrate that grain size significantly affects the mechanical properties and strength of rock, yet little research exists on the effect of grain size on stress-sensitive seepage behavior. In this study, we investigated the effect of grain size on the stress-dependent flow behavior of a porous rock using the three-dimensional discrete element method. We modeled the porous rock geometry using randomly generated rigid spherical grains of given size distribution enclosed in a cuboid. Particle-particle interactions and wall-particle interactions are governed by the Flat-Joint contact model. Rigid boundary walls are used, and a constant strain rate is applied to the boundaries to reach a pre-defined confining stress state. Subsequently, we used the pore scale finite volume method to model the steady-state fluid flow of single-phase fluid at each confining stress state of the model. The permeability-stress relationship data is best described by the exponential model, and the exponent of the exponential model (stress-sensitive coefficient) indicates how rapidly the permeability changes with stress. Our results show that the stress-sensitive coefficient varied very little with the grain size and shows a general decreasing trend with an increase in the mean grain size of the spherical pack. We argue that the effect of other parameters such as pore morphology, micro-cracks, and cementation has a greater influence on the stress-sensitive permeability than the grain size alone. INTRODUCTION The subsurface in-situ stresses exhibit dynamism, which is attributed to the influence of several anthropogenic factors such as reservoir depletion during hydrocarbon extraction, CO2 sequestration, geothermal activities, nuclear waste disposal, and natural causes arising from tectonic movements. Such stress variations significantly impact the physical properties of rocks, particularly their porosity, permeability, and dynamic elastic properties. Given the practical applications associated with these effects, the geoscience community has shown significant interest in this aspect.
最长约 10秒,即可获得该文献文件

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
刚刚
Lucas应助SSE采纳,获得10
1秒前
范范发布了新的文献求助10
2秒前
2秒前
我爱吃菜完成签到,获得积分10
3秒前
3秒前
赎罪完成签到 ,获得积分10
4秒前
Qsss完成签到,获得积分10
5秒前
ya发布了新的文献求助10
5秒前
5秒前
练得身形似鹤形完成签到 ,获得积分10
6秒前
6秒前
6秒前
7秒前
鹿港猫妖完成签到,获得积分20
8秒前
chen完成签到,获得积分10
8秒前
9秒前
阿湫发布了新的文献求助10
9秒前
9秒前
10秒前
崔悦欣发布了新的文献求助10
10秒前
希望天下0贩的0应助kk子采纳,获得10
11秒前
丰富的不惜完成签到,获得积分10
13秒前
票子发布了新的文献求助10
13秒前
华仔应助魏莱采纳,获得10
13秒前
F123发布了新的文献求助10
14秒前
shen发布了新的文献求助10
15秒前
15秒前
苗觉觉完成签到,获得积分10
16秒前
帕金森完成签到,获得积分10
17秒前
活力的妙芙完成签到,获得积分10
17秒前
赘婿应助疯子魔煞采纳,获得10
18秒前
橙橙橙完成签到,获得积分10
18秒前
18秒前
你好CDY完成签到,获得积分10
19秒前
19秒前
19秒前
万能图书馆应助希尔伯特采纳,获得10
19秒前
我是老大应助123采纳,获得10
20秒前
芒果小鹌鹑完成签到,获得积分10
21秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
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 4038446
求助须知:如何正确求助?哪些是违规求助? 3576149
关于积分的说明 11374627
捐赠科研通 3305875
什么是DOI,文献DOI怎么找? 1819354
邀请新用户注册赠送积分活动 892680
科研通“疑难数据库(出版商)”最低求助积分说明 815048