空气泡沫驱注入井监测管柱腐蚀特征与机理研究  

Study on Corrosion Characterization and Mechanism of the Monitoring Tubing under Air-Foam Flooding Injection Well

作　　者：宁创 张丽伟 童长兵 景正正 尹志福 NING Chuang;ZHANG Liwei;TONG Changbing;JING Zhengzheng;YIN Zhifu(Yanchang Oilfield Co.,Ltd.,BaoTa Oil Production Plant,Yan’an 716000,China;Shaanxi Key Laboratory of Surface Engineering and Remanufacturing,Xi’an 710065,China)

机构地区：[1]延长油田股份有限公司宝塔采油厂,陕西延安716000 [2]陕西省表面工程与再制造重点实验室,陕西西安710065

出　　处：《材料保护》2024年第12期147-153,共7页Materials Protection

基　　金：延长油田股份有限公司科技计划项目(ycsy2022xjs-C-3-8);陕西省教育厅重点科学研究计划(21JS035)。

摘　　要：通过对空气泡沫驱现场注入井管柱进行长期腐蚀监测,研究空气泡沫驱试验区注入井环境下上下井段处J55油管内外壁的腐蚀特征,借助扫描电镜和三维共聚焦显微镜表征了腐蚀产物的形貌,对腐蚀产物进行了能谱(EDS)和X射线衍射(XRD)分析,并对腐蚀机理进行了探讨。结果表明:J55油管整体腐蚀严重且存在不同程度局部腐蚀现象,下井段腐蚀更严重;油管不同井段的内外表面的腐蚀产物存在差异,主要为Fe_(0.925)O、FeS_(x)、Fe_(3)O_(4)和FeO(OH)等;碳钢油管在空气泡沫驱服役过程其组织有可能会形成微裂纹且为穿晶开裂。Through longterm corrosion monitoring of the airfoam flooding injection well string on site,the corrosion characteristics of the inner and outer walls of J55 tubing at the upper and lower well sections in the airfoam flooding test area injection well environment were studied.The morphologies of the corrosion products were characterized by SEM and 3D confocal microscopy,and the compositions of the corrosion products were analyzed by energy dispersive spectroscopy(EDS)and Xray diffraction(XRD)analysis.Furthermore,the corrosion mechanism was explored and discussed.The results showed that J55 oil pipe had severe overall corrosion and varying degrees of localized corrosion,with more severe corrosion in the downhole section.The corrosion products on the inner and outer surfaces of different sections of the tubing were different,mainly including Fe_(0.925)O,FeSx,Fe_(3)O_(4) and FeO(OH).The structure of carbon steel tubing might form cracks and be transgranular micro-cracking during the service of air-foam flooding.

关 键 词：油管腐蚀 空气泡沫驱 表面形貌 腐蚀产物 穿晶开裂 

分 类 号：TG172[金属学及工艺—金属表面处理]