顺北油田三高油气井完井测试封隔器影响因素及对策-《油气井测试》

文章信息/Info

Title:: Influencing factors of completion test packer and countermeasure for 3high oil and

gas well in Shunbei Oilfield

Author(s):: ZHOU Shengfu; CUI Longbing; LIU Lian; XIE Jin; ZHAO Zhonghui; Completion Test Management Center，SINOPEC Northwest Oilfield, Luntai，Xijiang 841600，

China

Keywords:: carbonate reservoir; high temperature and high pressure oil and gas well; oil testing;

corrosive medium; completion packer; success rate; wellbore integrity

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。

Abstract:: 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.