
站场区域阴极保护技术参数优选
于敏
邵守斌1
张天字2
第35卷第6期(2016.06)电气自控
摘要:为了解决喇嘛向油用地面设施离蚀问题,对区城阴极保护进行参数优选,在设计中,把喇嘛句油田喇3-1地区所属地面设备、管线作为一个特大的明极保护区城来统筹考虑。通过现场试验,成功完成了联合站一→中转站一→计量间一→单并管线一→油井套管大区城明极保护,实施阴极保护后,油井套管及埋地管可以延长使用寿命3~5倍,经测算投入产出比为1:5。
关键词:站场区域:阴极保护:保护电位:试验 Doi : 10.3969/j.issn.10066896.2016.6.020
Optimization of Technological Parameters in Station Yards Regional Cathodic Protection
Yu Min, Shao Shoubin, Zhang Tianyu
Abstract: In order to solve the corrosion problem of surface facilities, we have illustrated in detail the application of technological research on Regional Catholic Protection in Lamadiar oilfield after dn overall evaluation of its corrosion level. All affiliate facilities and pipe lines in Lamadian No.3 region are considered as a huge protection region, and through field experi ments, we have realized the optimization of technological parameters of Regional Catholic Protection operation throughout the transportetion line from Union station→Transfer sta tion→ Metering capsule→Single pipeline to the Council of cesing implementation, the effect of which has been pretty effective and yielding. After the implementation of cathodic protec tion, oil well casing and buried pipe can extend the service life is 3~5 times, by measuring the input and output ratio is 1 : 5.
Key words: station yards; cathodic protection; protective potential; experiment
喇嘛甸油田地势低洼,pH值在8.5~9.3之间,尤其是三矿地区为一类腐蚀区,海拨高程在144.5 ~145.8m,有的低区块常年积水,各种油水井管线浸泡在水中,加剧了管线的腐蚀速率。为了有效解决地面设施腐蚀问题,在联合站、中转站区域阴极保护的基础上,开展了单井管线,浅表层套管外加电流保护研究试验,获得成功"。
1
外加电流阴极保护技术
在阴极保护试验中,把大庆油田采油六厂
5016计量间所属的地下管线及7口油并作为一个保护体系,在离7口井适当的地方安装1座阳极地床,用1台100A/100V恒电位仪作为电源核心装置,再用1台多通道分流柜,把恒电位仪发出的电流分7路送至各个井口,并能控制其电流大小。对
大庆油田有限责任公司第六采油厂
“成都理工大学能源学院
油气田地面工程https/wwwayqtdmgc.com
于单井管线及井与井之间的管线全部焊接均压线,目的是使电流分布均勾。每个焊点采用错热焊,并且用固化剂加热履带进行防腐。所有的设备安在活凝土房内,防止愉盗。阴极保护示意图见图1
分流柜
果油料管
1 6183
恒电位仪
地床
图1
阴极保护示意图
外加电流阴极保护主要参数的确定
1.1
(1)管线的保护电位。考虑到环境因素保护电位一般在-0.85~-1.3V之间。
65