新型水平井不动管柱封隔器分段压裂技术

New single trip staged fracturing technology with packer isolation in horizontal wells

关键词:  油井生产  采油设备  压裂  分段压裂  水平井  封隔器隔离  有限元分析

Key words:  oil well production  oil production equipment  fracturing  staged fracturing  horizontal well  packer isolation  finite element analysis

摘要:

通过分析水平井分段压裂技术现状,提出一种新型水平井不动管柱封隔器分段压裂工艺技术。介绍新型工艺技术的管柱结构、工艺原理及创新点,并利用ABAQUS有限元分析软件对工艺管柱进行力学分析。结果表明:新型分段压裂工艺管柱能达到力学设计要求;新技术的创新点在于能够实现一趟管柱完成2～3层段分段压裂,设计封隔器长胶筒摩擦锚定,降低安全事故的发生, 设计工具挡砂传液机构,有效避免工具内腔进砂引起的事故,管柱无卡瓦锚定,可以反洗井,整个压裂施工可以在一天内完成,施工简单,可以有效节省作业时间和作业费用。

Abstract:

By analyzing the status of horizontal staged fracturing technology, a new type of single trip staged fracturing technology with packer isolation in horizontal wells was proposed, and its string structure, process principle and innovation were given. The mechanical analysis for the string was carried out by using ABAQUS finite element analysis software. The results show that the new fracturing string can achieve fracturing process design requirements. The innovations of the new technology is to complete 2-3 layers staged fracturing in single trip, design a packer with a long rubber to fix the string and reduce the occurrence of accidents, design anti sand tool part to effectively prevent sand from going into tool and causing fracturing accident. With non slip anchor tool, counter washing wells can be realized, and the whole fracturing with simple construction can be completed in one day, which can effectively save time and operating costs.