Modeling Fluid Interfaces During Cementing Using a 3D Mud Displacement Simulator

套管 钻井液 石油工程 环空(植物学) 流离失所(心理学) 钻孔 计算机科学 机械工程 地质学 岩土工程 钻探 工程类 材料科学 心理学 复合材料 心理治疗师
作者
Mark Savery,Robert Darbe,Wilson C. Chin
标识
DOI:10.4043/18513-ms
摘要

Abstract In completion of oil and gas wells, cementing operations are employed to provide zonal isolation, a means to prevent wellbore fluids from contaminating sensitive zones such as freshwater aquifers. Perhaps the most important factor engineers and operators should consider for successful cementing is adequate drilling-fluid removal, or "mud displacement." To help optimize mud removal, the primary technique used is to pump a spacer fluid with modified rheology that creates a favorable fluid-fluid interface to enhance mud displacement. In many instances, it is highly desirable to monitor how this interface evolves over time. Fluid intermingling may inhibit the ability of a fluid to perform its intended purpose, for example, intermixing of spacer fluid with cement slurry may lead to contamination of the cement. This contamination may cause an undesirable failure of the setting of the cement and, consequently, a significant increase in cost because of increased wait time or remedial repair. Therefore, a three-dimensional (3-D) simulator modeling the intermixing of wellbore fluids in a highly eccentric annulus with casing reciprocation and rotation has been developed. The computational system is formulated on a general curvilinear coordinate system whose boundaries can conform to irregular boreholes such as those with washouts. Unlike existing models limited to weakly eccentric annuli without casing movement, the present simulator handles multiple real-world effects and efficiently performs trade-off studies that can enable more economical and effective cementing jobs. The finite difference model provides visual output useful in prejob design and post-job analysis. Among these outputs are 3-D color plots illustrating axial velocity, concentration, viscosity, and density evolution. Introduction Efficient mud displacement is perhaps the most important factor in providing a successful cement job. The primary technique used today is to pump a spacer fluid ahead of the cement slurry. Several other factors that directly impact mud displacement are also known, including wellbore geometry, mud conditioning, casing movement via reciprocation and rotation, casing centralization, and optimizing the pump rate.1,2 However, it is often unknown the extent to which these variables affect mud displacement, especially when applied in combination with one another. Even a relatively straightforward cementing operation can quickly become a challenging scenario with multiple variables. The industry has conducted numerous large-scale physical studies3–8 over the last half-century to empirically evaluate the importance of these factors on displacement efficiency. More recently, however, a number of studies have taken advantage of computational numerical methods to describe the different aspects of the mud displacement process in annular geometries. Tehrani et al.9 discuss combined theoretical and experimental studies of laminar displacement in inclined eccentric annuli. The authors appropriately couple the momentum equation with the concentration equation suggested earlier by Landau and Lifshitz.10 Cui and Liu11 address helical flow in eccentric annuli based on the bipolar coordinate system. Pelipenko and Frigaard12 examine fluidfluid displacement in a two-dimensional (2-D) "narrow annuli" without casing reciprocation or rotation. The well known model discussed by Escudier et al.13,14 considers non- Newtonian viscous helical flow in eccentric annuli for a single fluid.
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
1秒前
1秒前
css完成签到,获得积分10
1秒前
Liufgui应助Re采纳,获得20
1秒前
Nugget完成签到,获得积分10
1秒前
yar应助潇湘雪月采纳,获得10
2秒前
宇宇发布了新的文献求助10
2秒前
shufessm完成签到,获得积分0
4秒前
4秒前
8秒前
幸福大白发布了新的文献求助30
8秒前
9秒前
肿瘤柳叶刀完成签到,获得积分10
10秒前
11秒前
11秒前
xxddw发布了新的文献求助10
12秒前
14秒前
GS11完成签到,获得积分10
15秒前
邓紫依完成签到,获得积分10
16秒前
cdytjt发布了新的文献求助60
16秒前
ai zs发布了新的文献求助10
16秒前
搜集达人应助zyw采纳,获得10
17秒前
18秒前
攀攀完成签到,获得积分10
19秒前
19秒前
Aprilapple发布了新的文献求助10
20秒前
张雯思发布了新的文献求助10
20秒前
21秒前
越野蟹关注了科研通微信公众号
22秒前
空军完成签到 ,获得积分10
24秒前
24秒前
酷波er应助moji采纳,获得10
24秒前
26秒前
传奇3应助打我呀采纳,获得30
27秒前
27秒前
Aprilapple发布了新的文献求助10
30秒前
30秒前
31秒前
zyw发布了新的文献求助10
31秒前
雪落你看不见完成签到,获得积分10
33秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
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 3989406
求助须知:如何正确求助?哪些是违规求助? 3531522
关于积分的说明 11254187
捐赠科研通 3270174
什么是DOI,文献DOI怎么找? 1804901
邀请新用户注册赠送积分活动 882105
科研通“疑难数据库(出版商)”最低求助积分说明 809174