顺北油田三高油气井完井测试封隔器影响因素及对策  

Influencing factors of completion test packer and countermeasure for 3-high oil and gas well in Shunbei Oilfield

作　　者：周生福 崔龙兵[1] 刘练[1] 谢进[1] 赵忠辉 ZHOU Shengfu;CUI Longbing;LIU Lian;XIE Jin;ZHAO Zhonghui(Completion Test Management Center,SINOPEC Northwest Oilfield,Luntai,Xijiang 841600,China)

机构地区：[1]中国石化西北油田分公司完井测试管理中心

出　　处：《油气井测试》2019年第3期37-41,共5页Well Testing

摘　　要：超深超高温高压含腐蚀介质油气井,完井封隔器应用成功率不到90%。梳理历年各类封隔器应用情况认为,影响完井封隔器成功率的关键因素是钻井泥浆固相沉淀、井眼轨迹、固井附件、桥塞钻屑,以及低压低产、气举掏空等极端工况下完井管柱的复杂受力。针对上述要素,建立了主要包括提高钻井液性能指标、优化完井管柱结构、保障井筒通畅性及清洁性、动态评价管柱安全性等手段的一套相对应的完井试油跟踪评价体系。经对2018-2019年20井次超深超高温高压含腐蚀介质油气井的应用评价,完井封隔器应用成功率提高5%。结果表明,该评价体系能够有效降低完井封隔器失败率,提高完井作业一次成功率,确保油气井生产过程中井筒完整性。In ultra-deep,ultra-high temperature and high-pressure oil and gas wells with corrosive media,the success rate of application of completion packer was less than 90%.By summarizing the application of various packers over the past years,it was concluded that the key factors affecting the success rate of completion packers were solid-phase precipitation of drilling mud,borehole trajectory,cementing accessories,bridge plug cuttings,and complex forces on completion string under extreme conditions such as low pressure and low production,gas-lift tunneling and so on.In view of the above factors,a complete well testing tracking evaluation system was established in this paper,which included improving drilling fluid performance index,optimizing completion string structure,ensuring wellbore fluency and cleanliness,and dynamically evaluating string safety.From 2018 to 2019,the application evaluation on 20 ultra-deep,ultra-high temperature and high-pressure oil and gas wells with corrosive medium shows that the success rate of application of completion packer has increased by 5%.The results mean that the evaluation system can effectively reduce the failure rate of completion packer,improve the one-time success rate of completion operation,and ensure wellbore integrity in the production process of oil and gas wells.

关 键 词：碳酸盐岩油气藏 高温高压油气井 试油 腐蚀介质 完井封隔器 成功率 井筒完整性 

分 类 号：TE353[石油与天然气工程—油气田开发工程]