[1]郭秀庭,任世举,彭雪梅,等.密封式涡流排水采气技术研究与实践[J].油气井测试,2019,28(06):38-43.[doi:10.19680/j.cnki.1004-4388.2019.06.007]
　GUO Xiuting,REN Shiju,PENG Xuemei,et al.Strength check of casing in high temperature deep well test in Dagang Oilfield[J].Well Testing,2019,28(06):38-43.[doi:10.19680/j.cnki.1004-4388.2019.06.007]
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密封式涡流排水采气技术研究与实践()

《油气井测试》[ISSN:1006-6977/CN:12-1485/TE]

卷:
28
期数:
2019年06期
页码:
38-43
栏目:
出版日期:
2019-12-25

文章信息/Info

Title:
Strength check of casing in high temperature deep well test in Dagang Oilfield
文章编号:
1004-4388(2019)06-0038-06
作者:
郭秀庭1; 任世举1; 彭雪梅2; 刘光普3 郭秀庭
1.中国石油大港油田公司石油工程研究院 天津 300280
2.中国石油大港油田公司勘探事业部 天津 300280
3.中海油田服务股份有限公司油田生产事业部 天津 300459      
Author(s):
GUO Xiuting1;  REN Shiju1;  PENG Xuemei2;  LIU Guangpu3 
1.Petroleum Engineering Research Institute, PetroChina Dagang Oilfield Company, Tianjin 300280, China
2.Exploration Department, PetroChina Dagang Oilfield Company, Tianjin 300280, China
3.Oilfield production division of CNOOC Oilfield Services Co., Ltd, Tianjin 300459, China
关键词:
大港油田;  深井;  高温井;  试油;  掏空深度;  泥浆密度;  套管强度;  计算方法
Keywords:
Dagang Oilfield;  deep well;  high temperature well;  testing oil;  hollowing depth;  mud density;  casing strength;  calculation method
分类号:
TE353
DOI:
10.19680/j.cnki.1004-4388.2019.06.007
文献标志码:
B
摘要:
涡流排水采气技术利用一支或多支无运动件的井下涡流工具，来增加气体携水量，具有一次投入费用低，有效延长采气周期以及操作简便无安全环保隐患的技术优势。但现有的涡流工具与油管内径之间存在着间隙，与φ73mm油管内径间隙面积相当于φ26.6mm油嘴面积，流经此面积的气体未被有效利用，并起到干扰其它正常涡流气体携水的副作用，限制了应用范围。密封式涡流排水采气技术有效解决了此技术难题，100%气体被有效用来携液，通过2口井的现场应用，效果显著。
Abstract:
The casing in the high temperature deep well is affected by the friction of the drill string, the axial stress of tension or compression, the radial stress of internal and external pressure difference and the circumferential stress, and is easy to be damaged. This paper introduces the methods for calculating the maximum allowable hollowing depth, the minimum allowable liquid density, the maximum allowable internal pressure resistance and the strength check of casing abrasion from aspect of load calculation, governing equations, boundary conditions and solving methods. The results show that under the negative pressure in the casing, the dangerous point is at the casing shoe when the wellbore liquid density is less than the casing mud density. The dangerous point is at the point and below of the casing hollowing point when the wellbore liquid density is greater than or equal to the casing outer mud density. The most dangerous point of damage is the casing shoe when the casing is replaced by the lowest density. The wellhead position is the weakest when the casing performance is consistent. The casing strength was checked by 30 oil wells in Dagang Oilfield. There was no oil safety accident caused by casing strength problems. This technology can provide support for the strength check of similar high temperature deep well testing casings.

相似文献/References:

[1]王奎,张乾,滕俊男,等. 大港油田GY1井钢丝打捞作业[J].油气井测试,2022,31(04):42.[doi:10.19680/j.cnki.1004-4388.2022.04.008]
　[J].Well Testing,2022,31(06):42.[doi:10.19680/j.cnki.1004-4388.2022.04.008]
[2]赵庆杰,唐宏宝,张乾,等. 页岩油压裂井产量预测方法研究[J].油气井测试,2024,33(03):46.[doi:10.19680/j.cnki.1004-4388.2024.03.008]
　[J].Well Testing,2024,33(06):46.[doi:10.19680/j.cnki.1004-4388.2024.03.008]

备注/Memo

备注/Memo:
2019-10-04收稿，2019-10-22修回，2019-11-10接受，2019-12-20 网络版发表
中国石油勘探与生产分公司科研项目“大港油田歧口斜坡带与潜山试油配套技术研究”（kt2017-15-03-1）
郭秀庭，男，高级工程师，大港油田公司试油高级专家，1991年毕业于中国石油大学（华东）采油工程专业，长期从事油田试油技术研究工作38年。电话：022-25928541，15122172989；Email： guoxting@petrochina.com.cn 。通信地址：天津市滨海新区大港油田公司石油工程研究院，邮政编码：300280。
更新日期/Last Update: 2020-01-09