表面技术2018，Vol.47Issue(2)：195-201,7.DOI:10.16490/j.cnki.issn.1001-3660.2018.02.031
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
陈毅 1许杰 1贾立新 1王孔阳 2林海 1闫伟2
作者信息
- 1. 中海石油(中国)有限公司天津分公司,天津300459
- 2. 中国石油大学(北京),北京102249
- 折叠
摘要
Abstract
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:PCO2 =0.2 MPa and PH2S =0.0023 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.关键词
稠油/蒸汽吞吐/强度衰减/CO2/H2S腐蚀/套管优选Key words
heavy oil/steam stimulation/strength attenuation/CO2/H2S corrosion/casing selection分类
矿业与冶金引用本文复制引用
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):195-201,7.
