苏77、召51区块缓蚀剂评价与机理研究.pdfVIP

HotWorkingTechnology2023,Vol.52,No.4

苏77、召51区块缓蚀剂评价与机理研究

王吉喆，张骁勇，段文广2，冉照辉²，奚运涛1，雒设计1

(1.西安石油大学材料科学与工程学院，陕西西安710065;2．中国石油集团西部钻探工程有限公司，新疆乌鲁木齐

830026)

摘要：针对苏77、召51区块N80油套管钢出现的腐蚀穿孔问题，利用高温高压模拟实验和电化学极化曲线法研

究了RX-204B和IMC-80BH等两种常用缓蚀剂的作用机理及防腐效果。通过扫描电镜对去除腐蚀产物前后的试样表

面形貌进行观察；采用能谱分析仪对腐蚀产物进行成分分析。结果表明：两种缓蚀剂均为吸附膜阳极控制型缓蚀剂，由

于成分不同，官能团的作用机理不同，不同浓度下两种缓蚀剂的极化曲线变化规律存在一定差异。明确了两种缓蚀剂的

腐蚀机理及最佳加注浓度，形成了适用于苏77、召51区块气井井筒工况的最优防腐工艺，

关键词：N80钢；气田；缓蚀剂；缓蚀机理

D0I:10.14158/ki.1001-3814

中图分类号：TG174.42文献标识码：A文章编号：1001-3814(2023)04-0058-04

StudyonEvaluationandMechanismofCorrosionInhibitors

inSU77andZHAO51Blocks

WANGJizhe,ZHANGXiaoyong,DUANWenguang,RANZhaohui?,XIYuntao,LUOSheji

(1.CollegeofMaterialsScienceandEngineering,XianShiyouUniversity,Xian710065,China;2.CNPCXibuDrilling

EngineeringCompanyLimited,Urumqi830026,China)

Abstract:AimingatthecorrosionperforationproblemofN80oilcasingsteelinSu77andZhao51blocks,theeffect

mechanismsandanti-corrosioneffectsofRX-204BandIMC-80BHcorrosioninhibitorswasstudiedbyhightemperatureand

highpressuresimulationtestandelectrochemicalpolarizationcurvemethod.Thesurfacemorphologyofthesamplesbefore

andaftertheremovalofcorrosionproductswasobservedbySEM.Thecompositionofthecorrosionproductswerestudiedby

energyspectrumanalyzer.Theresultsshowthatbothcorrosioninhibitorsareanode-controlledcorrosioninhibitorswith

adsorptionmembranes.Duetodifferentcomposition,themechanismofactionoffunctionalgroupsisdifferent.Thereare

somedifferencesinthepolarizationcurvesofthetwocorrosioninhibitorsatdifferentconcentrations.Finally,thecorrosion

mechanismandoptimalfillingconcentrationofth