摘要
趾端压裂滑套代替连续管射孔用于水平井首段压裂施工具有较高的经济效益。针对常规趾端滑套难以满足开启压力窗口范围较窄的油气井首段压裂问题,研发了一种电子趾端滑套。采用特殊设计的低成本锁定与开启控制系统,通过定制的压力波形实现远程触发开启,可以有效避免滑套在施工过程中与压力相关的风险,开展了电子趾端滑套结构及功能设计,并对其压力信号采集精度、整体能耗和开启性能进行了地面测试。研究结果表明:压力采集精度受密封件摩擦影响,在50 MPa以上高压时,采集压力与实际压力差值稳定在3 MPa左右;电子趾端滑套在150℃环境下持续工作电流只需9 mA,整机能耗为216 mA·h/d;在地面试验中,电子趾端滑套能够成功识别压力波形信号并解锁电磁式液压锁,试验最高压力达到98 MPa。研究结果可为深层、超长水平段油气开发提供选择。
It has high economic benefits to use the toe-end frac sliding sleeve to replace coiled tubing perforation in the first section fracturing construction of horizontal wells.However,the conventional toe-end sliding sleeve is difficult to meet the first section fracturing of oil and gas wells with narrow opening pressure window;therefore,an electronic toe-end frac sliding sleeve was developed in the paper.With the help of a specially designed low-cost locking and unlocking control system,the customized pressure waveform was used to realize remote triggering unlocking,effectively avoiding the risks related to pressure of sliding sleeve during the construction process.Moreover,the structure and function of electronic toe-end frac sliding sleeve were designed,and the pressure signal acquisition accuracy,overall energy consumption and unlocking performance of it were tested on the ground.The research results show that the pressure acquisition accuracy is affected by the friction of the sealing element;when the pressure exceeds 50 MPa,the difference between the collected pressure and the actual pressure remains stable at about 3 MPa;the electronic toe-end frac sliding sleeve only needs 9 mA of continuous working current in a 150 ℃ environment,and the overall energy consumption is 216 mA·h/d;in ground tests,the electronic toe-end frac sliding sleeve can successfully recognize pressure waveform signals and unlock electromagnetic hydraulic locks,with a maximum test pressure coming to 98 MPa.The research results provide choices for oil and gas development of deep and ultra-long horizontal sections.
作者
刘奔
Liu Ben(Sinopec Petroleum Engineering Technology Research Institute Co.,Ltd.)
出处
《石油机械》
北大核心
2024年第6期103-108,共6页
China Petroleum Machinery
基金
中国石油化工集团有限公司科技部项目“井下工具电磁液压锁定与远程解锁技术”(P22218)。
关键词
压裂工具
趾端滑套
电子滑套
压力信号
电磁式液压锁
fracturing tool
toe-end sliding sleeve
electronic sliding sleeve
pressure signal
electromagnetic hydraulic lock
