>> 自然科学版期刊 >> 2013年01期 >> 正文
四川盆地页岩气井地面安全返排测试技术
供稿: 刘飞;王勃;潘登;曾小军;庞东晓 时间: 2018-11-28 次数:

作者:刘飞;王勃;潘登曾小军庞东晓

作者单位:成都理工大学能源学院;川庆钻探工程有限公司钻采工程技术研究院;中国石油勘探开发研究院廊坊分院

摘要:针对页岩气藏大规模加砂压裂后地面连续返排测试作业以及钻塞冲砂作业期间,返排液含大量砂粒和碎屑,地面返排测试流程易发生堵塞或刺漏,安全风险高等问题,完善地面流程布局,优化设计出专用排砂管线和测试管线,研发配套了105 MPa捕塞器、105 MPa旋流除砂器、105 MPa管柱式除砂器等系列除砂除屑装备,在此基础上开展相关的工艺技术研究,确定出不同返排测试工况条件下流程的最优走向,形成了一套集除砂除屑、流程超压保护、防冰堵和安全监控为一体的页岩气井地面安全返排测试工艺技术,解决了页岩气井地面返排测试作业面临的高回压条件下钻塞捕屑、除砂、大排量连续返排等技术难题,运用该技术安全高效地完成了四川盆地多口页岩气井的地面测试计量作业,保障了页岩气井返排测试期间地面流程设备和作业人员的安全,效果显著.

关键词:四川盆地;页岩气;地面流程;控压;除砂;连续返排测试技术;

DOI:10.16186/j.cnki.1673-9787.2013.01.022

分类号:TE38

Abstract:The shale gas reservoirs mainly rely on horizontal well technology and large-scale separated-layer fracturing technique to enhance productions.Formation sand producing severely after large-scale sand fracturing or during the course of milling the bridge-plug led to a high risk of the surface flow-back test of the shale gas well.Thusly, in order to solve the problems of catching plug debris, removing sand and achieving continuous high rate flow-back under high wellhead pressure, the new flow-back and well testing plans are designed.Two sand clearance lines are designed for flow-back operations, and self-developed equipment such as 105MPa plug catcher and 105MPa cyclone desander are put into use, which ensure the sand removing efficiency and the smooth flow of the surface flow lines.On that basis, the corresponding technologies are developed, eventually forming a set of unique surface flow-back test technology for shale gas, including ice blockage prevention, overpressure protection and security monitoring technologies.A lot of flow-back tests of shale gas wells have successfully completed in Sichuan basin by using such technology.

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