[1]蒋 秀,张艳玲,王江云,等.水力压裂过程中套管内流动冲蚀损伤规律研究[J].油气井测试,2018,27(01):48-54.[doi:10.19680/j.cnki.1004-4388.2018.01.008]
　JIANG Xiu,ZHANG Yanling,WANG Jiangyun,et al.Erosion pattern of flow field in casing during hydraulic fracturing[J].Well Testing,2018,27(01):48-54.[doi:10.19680/j.cnki.1004-4388.2018.01.008]
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水力压裂过程中套管内流动冲蚀损伤规律研究()
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《油气井测试》[ISSN:1006-6977/CN:12-1485/TE]

卷:
27
期数:
2018年01期
页码:
48-54
栏目:
出版日期:
2018-02-25

文章信息/Info

Title:
Erosion pattern of flow field in casing during hydraulic fracturing
文章编号:
1004-4388(2018)01-0048-07
作者:
蒋  秀1;  张艳玲1;  王江云2;  屈定荣1 
1. 中国石油化工股份有限公司青岛安全工程研究院  山东青岛  266071
2. 中国石油大学(北京)克拉玛依校区工学院  新疆克拉玛依  834000   
Author(s):
JIANG Xiu 1;  ZHANG Yanling 1;  WANG Jiangyun 2;  QU Dingrong 1
1. Sinopec Research Institute of Safety Engineering, Qingdao, Shandong 266071, China
2. College of Engineering, China University of PetroleumBeijing at Karamay, Karamay, Xinjiang 834000, China
关键词:
水力压裂; 套管; 水平井; 冲蚀; 多相流
Keywords:
hydraulic fracturing;  casing;  horizontal well;  erosion;  multiphase flow.
分类号:
TE357
DOI:
10.19680/j.cnki.1004-4388.2018.01.008
文献标志码:
B
摘要:
油气田水力压裂施工时，高速注入的压裂液会对套管内壁产生一定冲蚀损伤，其中井筒造斜弯肘的冲蚀问题尤为严重。基于欧拉-拉格朗日多相流模型方法，采用RNG k-ε湍流模型和改进的冲蚀模型对水力压裂过程中套管内的携砂压裂液多相流动及冲蚀过程进行了数值模拟，研究了套管内部流场分布规律和压裂参数对套管冲蚀的影响规律。计算结果表明，套管内各位置颗粒浓度分布基本一致；从井口向井下压力逐渐降低，在弯肘处压力明显降低，压裂液流速接近峰值30 m/s；在竖直井与水平井相连接入弯处45°前位置出现了冲蚀破坏危险点，冲蚀速率出现峰值。水力压裂过程中套管壁面平均冲蚀速率随平均砂比、压裂液排量及压裂砂平均粒径的增大而增大，对套管壁面冲蚀影响最为关键参数是平均砂比，其次是颗粒粒径和排量，而压裂压力影响最小。在此基础上，从井眼轨迹和套管设计、压裂工艺参数设置等方面提出了降低压裂过程套管冲刷磨损的优化建议。
Abstract:
In hydraulic fracturing of oil field, the fluid injected at high speed will cause some erosion damage to the inner wall of casing, especially at the elbow. On the basis of EulerLagrange multiphase flow model, the RNG k-ε turbulence model and modified erosion model were used for numerical simulation of multiphase flow of sandcarrying fracturing fluids and relevant erosion in casing during hydraulic fracturing to highlight the patterns of flow field distribution in casing and impacts of fracturing parameters on casing erosion. The results show that different parts of casing have basically the same distribution pattern of particle concentrations. From wellhead to bottomhole. Obvious pressure drop was observed at the elbow where the maximum flow rate of 30m/s was reached. The dangerous place where the erosion occurred was at the elbow of 45 degree. The average erosion rate in the casing increased with the increasing of the average sand ratio, the fracturing output and the average particle size. The most critical influencing factor of erosion was the average sand ratio, followed by the fracturing output and the average particle size, while the fracture pressure was the least. On this basis, the suggestions were made to decrease the erosion to the casing from the aspects of well trajectory and casing design, the setting of fracturing parameters and so on.

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备注/Memo

备注/Memo:
2017-07-05收稿，2017-12-08修回，2017-12-12接受，2018-03-30网络发表
蒋秀，女，1976年出生，博士，高级工程师，2005年毕业于中国科学院金属研究所材料学专业，主要从事油气系统及CO2储运系统的设备腐蚀防护与安全方面的研究。电话：0532-83786422，13808971651；Email：jiangx.qday@sinopec.com。地址：青岛市崂山区松岭路339号，邮政编码：266071。
更新日期/Last Update: 2018-04-26