连续油管结合双封单卡压裂技术应用

Application of Coiled Tubing Frac Technique Using Double-sealing and Single-stick

针对大庆油田水平井双封单卡压裂技术进行多段压裂施工时需要反复拆装井口、上提管柱,存在施工效率低、劳动强度大及井控风险的问题,开展了连续油管与双封单卡压裂技术相结合的水平井连续油管压裂技术研究。研制了连续油管压裂配套工具和井口防喷装置,实现了与双封单卡压裂工艺的配套;开展了摩阻测试试验,掌握连续油管摩阻规律,为确定合理的施工参数提供了依据。现场试验表明:连续油管与双封单卡压裂技术相结合能有效解决井控风险,提高施工效率,减轻劳动强度,为扩展双封单卡压裂技术在中浅层气井的应用奠定了基础。

The dominant horizontal frac technique is the sectional frac technique with dual-retriev-able packers in the Daqing Oilfield.Several intervals treatment can be done in one trip using this kind of technique,but the well-head equipments need to be assembled and disassembled repeatedly and the tubing need to be pulled upward.These operations can lead to the low job efficiency,in-tense labors and high risk of well control.The coiled tubings were introduced in the Daqing Oil-field,which were integrated with the sectional frac technique in the horizontal wells to take advan-tage of the coiled tubing and improve the frac efficiency.The allied kits of the coiled tubing were developed to match the dual-packers frac tools,anti-blowing equipments on the well head were re-searched and the test of the resistance about the coiled tubing was researched to optimize the rea-sonable frac parameters.The coiled tubing frac technique has been applied on Well X8-D4-P12, and the facts that improving the rig efficiency,reducing the worker’s labor and lowering the risk of well operation were confirmed.