|本期目录/Table of Contents|

[1]张智,邓皓匀,向世林.储气库井在CO2腐蚀作用下的环空带压安全管控*[J].中国安全生产科学技术,2024,20(9):120-127.[doi:10.11731/j.issn.1673-193x.2024.09.014]
　ZHANG Zhi,DENG Haoyun,XIANG Shilin.Safety control of annular pressure in gas storage wells under CO2 corrosion[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(9):120-127.[doi:10.11731/j.issn.1673-193x.2024.09.014]
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储气库井在CO2腐蚀作用下的环空带压安全管控*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
20
期数:
2024年9期
页码:
120-127
栏目:
职业安全卫生管理与技术
出版日期:
2024-09-30

文章信息/Info

Title:
Safety control of annular pressure in gas storage wells under CO2 corrosion
文章编号:
1673-193X(2024)-09-0120-08
作者:
张智; 邓皓匀; 向世林
（1.西南石油大学 油气藏地质及开发工程国家重点实验室，四川 成都 610500；
2.重庆科技大学 石油与天然气工程学院，重庆 401331）
Author(s):
ZHANG Zhi;  DENG Haoyun;  XIANG Shilin
(1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu Sichuan 610500,China;
2.School of Petroleum and Natural Gas Engineering,Chongqing University of Science and Technology,Chongqing 401331,China）
关键词:
储气库井; 腐蚀; 剩余强度; 环空带压
Keywords:
gas storage well;  corrosion;  residual strength;  annular pressure
分类号:
X937
DOI:
10.11731/j.issn.1673-193x.2024.09.014
文献标志码:
A
摘要:
为加强储气库井在长期注采周期中的安全运行，考虑CO2腐蚀对储气库井管柱的影响，建立管柱均匀腐蚀预测模型和剩余强度计算模型，在此基础上对储气库井A环空带压临界值进行计算，建立A环空带压临界控制图版。研究结果表明：在注采阶段，随着井深增大，油管柱腐蚀速率减小，而套管柱腐蚀速率先增大后减小；由于地层水和离子影响，采气阶段管柱衰减速率大于注气阶段；A环空带压临界值随油管的抗外挤强度减小而减小，油管的抗外挤强度为A环空带压临界值的主要影响因素；在储气库井正常运行时，选择初始壁厚更厚、初始强度更高的油管能够有效降低A环空带压临界值减小的速率。研究结果可为储气库井环空带压管理方案提供理论参考。
Abstract:
In the long-term injection-production cycle of underground gas storage wells,the annular pressure phenomenon caused by the corrosion of pipe string in the wellbore brings great challenges to the operation of gas storage wells.In order to strengthen the safe operation of gas storage wells,a prediction model of uniform corrosion and a calculation model of residual strength for tubing were established considering the influence of CO2 corrosion on gas storage well tubing.On this basis,the critical pressure value of A annulus in the gas storage well was calculated,and a control chart for the critical pressure of A annulus was established.The results show that in the injection-production stage,with the increase of well depth,the corrosion rate of the tubing string decreases,while the corrosion rate of the casing string increases first and then decreases.Due to the influence of formation water and ions,the attenuation of string in the gas production stage is greater than that in the gas injection stage.The critical value of A annulus decreases with the decrease of the extrusion strength of tubing,and the extrusion strength of tubing is the main controlling factor of the critical value of A annulus.When the gas storage is in normal operation,the selection of tubing with thicker initial wall thickness and higher initial strength can reduce the reduction rate of the critical value of A annular pressure.The research results can provide theoretical reference for the management scheme of annular pressure in gas storage wells.

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备注/Memo

备注/Memo:
收稿日期： 2024-03-21
* 基金项目： 国家自然科学基金项目（U22A20164，52074234）；中国石油-西南石油大学创新联合体科技合作项目（2020CX040100）
作者简介： 张智，博士，教授，主要研究方向为油气井工程。
更新日期/Last Update: 2024-10-08