油井套管DPC内涂层井下检测技术研究与应用  

Research and application of technology of downhole detection of DPC inner coating of oil well casing

作　　者：肖彦英 令永刚 朱西柱 程碧海[2] 王威 

机构地区：[1]中国石油长庆油田分公司第十采油厂,745100 [2]中国石油长庆油田分公司油气工艺研究院

出　　处：《低渗透油气田》2016年第2期143-146,共4页

摘　　要：针对井下套管内涂层缺乏有效检测和变化监测手段的问题，开展了微电极法和单电极法2种套管内涂层检测技术现场试验，并建立了不同矿化度介质下微电阻与内涂层损失率之间的定量数学关系，通过2种方法互补，较清晰地反映出涂层套管配套情况及涂层随时间变化趋势，为新井内防腐工艺配套执行情况核查和防腐工艺适应性评价提供了有效的途径。In view of the lack of effective detection and variation monitoring means of inner coating of downhole casings, field test of two detection technologies of inner coating of casings, that is, microelectrode method and the single electrode method, was carried out. The quantitative mathematical relationship between the micro- resistance and the inner coating loss rate in the media with various salinities （total dissolved solid ） was established. The compatibility of the above methods reflected clearly the matching of coated casings and the tendency of coating change with time. This provides an effective way for the verification of the supporting performance of anti-corrosion process and the adaptability evaluation of anti-corrosion technology of new wells.

关 键 词：内涂层检测 微电极法 单电极法 涂层损失率 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]