
管道防腐
王嘉亮:二氧化碳驱引起管线穿孔的统计分析及防治措施
二氧化碳驱引起管线穿孔的统计分析及防治措施王嘉亮”
摘要:二氧化碳驱后柳赞北区管线穿孔频率明显增加,为查明原因,从管线类别、地理位置、穿孔影响因素及管线使用时间等因素进行了统计分析。结果显示,该地区管线频繁穿孔是受二氧化碳驱的影响,部分对应油并产出液中二氧化碳浓度较高,在集输过程中对管线造成扇蚀,导致管线穿孔;同时转油站不能成功地除去原油中高浓度的二氧化碳,使得掺水中二氧化碳含量累加,导致掺水管线穿孔。结合实际生产工艺流程,采取改换掺水来源、更换严重离蚀管段、优化原油集输流程和化学防腐等措施,可极大地降低区域管线穿孔频率,对管线具有良好的保护效果。
关键词:二氧化碳驱;管线穿孔;统计分析;防治措施 Doi:10.3969/j.issn.10066896.2017.04.025
Statistical Analysis andPrevention Measures of Pipeline Perforation Caused by Carbon
Dioxide Flooding WangJialiang
Abstract: After using carbon dioxide flooding, pipeline perforation frequency of Liuzan North area
geographic locations,perfo
increases significantly.In order to find the reason, pipeline categories,
ration factors and pipeline using time are statistically analyzed and then verified by theories, practice and experiments, Results show that the frequent perforation in the area is caused by carbon dioxide flooding. Carbon dioxide concentration in produced liquid of some related oil wells is high, which causes pipe line corrosion during gathering and transporting process and then leads to pipeline perforation.Mean while, oil transfer stations cannot remove high concentration of carbon dioxide from the crude oil, which makes carbon dioxide in blending water accumulate and blending water pipeline perforate. Combined with actual production process, measures such as changing blending watered source, re-placing seriously corrosive pipeline sections, changing gathering and transportation process and adding corrosion inhibitors are put forward. They cen effectively reduce frequency of pipeline perforation in the area and have good effect on pipeline protection.
Key words: carbon dioxide flooding; pipeline perforation; statistical analysis; prevention measures
冀东油田公司陆上油田作业区作业二区成立于 2012年9月18日,主要管理柳费北区和柳中部分区块,下设中心站4个,采油平台30个,油井170 口。油井集输流程为井口产液通过单井管线输往计量间,在计量间汇集后通过总集输管网外输到转油站,在转油站经过简单脱水处理后外输到联合站。油井生产平台周围多为虾池,集输管网5m内有养殖池、河流、水沟,一且管网发生穿孔泄漏,极易造成水体污染。
管线穿孔统计分析
柳赞北区自2011年11月开始实施二氧化碳
"大庆油田有限责任公司第三采油厂 86
万方数据
驱,统计2009年4月至2013年4月管线穿孔情况(表1),可知2013年2月至3月期间,生产区域内频繁发生管线穿孔。在区域分布图(图1)上对穿孔区域、掺水管线和回油管线进行了标注。对28 次管线穿孔的管线类别、地理位置、穿孔影响因素及管线使用时间分析如下。
1.1
管线类别
根据区块原油物性,全部生产区域采用伴掺水
生产,生产区域管网主要包括掺水管线、回油管线、注水管线和洗井回水管线。28次管线穿孔中,20次为掺水管线穿孔,8次为回油管线穿孔,穿孔管线全部为油井管网,且油井掺水管线穿孔在
油气田地面工程http:/wrwwujqtdmgc.com