陈毅,许杰,贾立新,王孔阳,林海,闫伟.海上热采井套管热应力强度衰减与高温腐蚀叠加条件下的管材优选研究[J].表面技术,2018,47(2):195-201.
CHEN Yi,XU Jie,JIA Li-xin,WANG Kong-yang,LIN Hai,YAN Wei.Casing Selection for Thermal Wells under Condition of Thermal Strength Attenuation and High Temperature Corrosion in Offshore Oilfield[J].Surface Technology,2018,47(2):195-201 |
| 海上热采井套管热应力强度衰减与高温腐蚀叠加条件下的管材优选研究 |
| Casing Selection for Thermal Wells under Condition of Thermal Strength Attenuation and High Temperature Corrosion in Offshore Oilfield |
| 投稿时间：2017-07-28 修订日期：2018-02-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.02.031 |
| 中文关键词: 稠油 蒸汽吞吐 强度衰减 CO2/H2S腐蚀 套管优选 |
| 英文关键词:heavy oil steam stimulation strength attenuation CO2/H2S corrosion casing selection |
| 基金项目: |
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| Author | Institution |
| CHEN Yi | CNOOC China Limited, Tianjin Branch, Tianjin 300459, China |
| XU Jie | CNOOC China Limited, Tianjin Branch, Tianjin 300459, China |
| JIA Li-xin | CNOOC China Limited, Tianjin Branch, Tianjin 300459, China |
| WANG Kong-yang | China University of Petroleum (Beijing), Beijing 102249, China |
| LIN Hai | CNOOC China Limited, Tianjin Branch, Tianjin 300459, China |
| YAN Wei | China University of Petroleum (Beijing), Beijing 102249, China |
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| 中文摘要: |
| 目的 探究不同材质套管在高温腐蚀环境下的适用性。方法 采用高温高压釜，以渤海某稠油油田岩心、地层水样为腐蚀介质，对不同材质的套管进行模拟评价。结果 利用气相色谱技术分析确定了该油田的腐蚀环境：CO2分压最高值为0.2 MPa，H2S分压最高值为0.0023 MPa。用最高的腐蚀气体分压进行了腐蚀模拟实验，测定出不同钢材在此腐蚀环境下的腐蚀速率，并建立了长期腐蚀速率预测模型，得到100H、80-1Cr、110-3Cr的长期腐蚀速率分别为0.24、0.20、0.05 mm/a。综合腐蚀实验结果和稠油热采套管强度衰减规律，对热采套管进行了强度设计，80-1Cr、100H、110-3Cr的安全寿命分别为3.8、6.5、11.2 a。结论 高温会引起套管强度衰减，且腐蚀会导致套管径厚比变化，而多轮次注蒸汽会加速腐蚀进程，降低套管的使用寿命。研究结果对腐蚀环境中稠油热采套管的选材具有重大指导意义。 |
| 英文摘要: |
| The work aims to investigate applicability of different types of casings at high temperature and corrosive environment. With rock core and formation water of LD oilfield as corrosive medium, different types of casings were simulated and evaluated with a HTHP autoclave. Corrosion environment of the oilfield was determined by adopting gas chromatographic technique: MPa and MPa. Corrosion simulation experiments were conducted based on the maximum corrosion gas partial pressure, and corrosion rate of different steels in this corrosion environment was measured, then a prediction mode of long-term corrosion rate was built, long-term corrosion rate of 100H, 80-1Cr and 110-3Cr was 0.24 mm/a, 0.20 mm/a and 0.05 mm/a, respectively. According to the corrosion experiment results and strength attenuation law of heavy oil thermal well casing, strength design of thermal well casing was carried out, and safe life of 80-1Cr, 100H, 110-3Cr was 3.8 years, 6.5 years and 11.2 years, respectively. High temperature will reduce casing strength, and corrosion will change diameter-thickness ratio. Furthermore, cyclic steam injection will accelerate corrosion process, thus cut down service life of the casing. The study results are of guiding significance to material selection of thermal well casing in corrosion environment. |
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