油气井用高密度封隔液体系研究及性能评价  

Study and performance evaluation of high density packer fluid system for oil and gas wells

作　　者：蔡斌 罗刚 李三喜 李艳飞 林科雄 CAI Bin;LUO Gang;LI San-xi;LI Yan-fei;LIN Ke-xiong(CNOOC China Limited,Shanghai Branch,Shanghai 200335,China;Hubei Hanc New-Technology Co..,Ltd.,Jingzhou 434000,China)

机构地区：[1]中海石油(中国)有限公司上海分公司,上海200335 [2]湖北汉科新技术股份有限公司,湖北荆州434000

出　　处：《化学工程师》2024年第3期47-49,36,共4页Chemical Engineer

基　　金：中海石油(中国)有限公司七年行动计划重大科技专项(CNOOC-KJ 135 ZDXM SH)。

摘　　要：本文以磷酸盐、抗高温缓蚀剂HSJ-T、抗高温缓蚀剂HSJ-G配合除氧剂HCY-6研究了适合海上N油田的抗高温高密度封隔液体系,并对体系的性能进行了评价。评价结果表明,该封隔液体系的密度可达1.60g·cm^(-3),抗温能力达到150℃;采用挂片失重法评价了体系的高温腐蚀性,体系在150℃高温下对3Cr-L80和13Cr-L80材质的钢材的腐蚀速率小于0.076mm·a^(-1)的行业标准,表现出优良的防腐性能;采用沉降因子法SF评价了封隔液的高温稳定性,体系在150℃高温下静置沉降30d,上下密度差为0,表现出良好的高温沉降稳定性;并通过腐蚀速率大小预测了海上N油田套管和油管的服役寿命,预测结果表明,以3Cr-L80材质作为套管的服役寿命为14~19a,以13Cr-L80材质作为油管的服役寿命为9~12a。根据体系和综合性能评价结果,研究的封隔液体系满足海上N油田及类似油气田的开采作业要求。In this paper,phosphate,high-temperature corrosion inhibitor HSJ-T,high-temperature corrosion inhibitor HSJ-G combined with oxygen deoxidizer HCY-6 were used to study the high-temperature and high-density sealing fluid system suitable for offshore N oilfield,and the performance of the system was evaluated.The evaluation results showed that the density of the packer liquid system can reach 1.60g·cm^(-3),and the temperature resistance capacity can reach 150℃.The high temperature corrosion of the system was evaluated by using the weight loss method.The corrosion rate of 3Cr-L80 and 13Cr-L80 steel at 150℃is less than the industry standard of 0.076mm·a^(-1),showing excellent anti-corrosion performance.The settlement factor method SF was used to evaluate the temperature stability of the packer fluid.When the system was settled at 150℃for 30 days,the difference between the upper and lower densities is zero,showing good high-temperature settlement stability.The service life of casing and tubing in offshore N Oilfield was predicted by corrosion rate.The predicted results show that the service life of casing with 3Cr-L80 material is 14~19 years,and that of tubing with 13Cr-L80 material is 9~12 years.Acording to the results of system and comprehensive performance evaluation,the studied packer fluid system can meet the production requirements of offshore N Oilfield and similar fields.

关 键 词：高温深井 封隔液 高密度 腐蚀性能 沉降稳定性 服役寿命 

分 类 号：TE254.6[石油与天然气工程—油气井工程]