海上水平裸眼井分舱防砂与智能分采完井技术

Research and Application of Subdivided and Intelligent Completion Technology for Offshore Horizontal Open-Hole Wells

渤海油田水平井高效开发面临防砂难度大和高含水突出等问题,且无人平台的推广增加了生产井远程监控的需求。针对当前的生产需求,研发了一种水平裸眼井分舱防砂与智能分采完井技术。引入旁通隔离封隔器设计了一趟多舱砾石充填管柱,旁通隔离封隔器双重封隔可有效防止层间窜流,为智能分采提供良好的井筒环境;重新设计智能分采管柱产液流动通道,将液控智能滑套优化到顶部封隔器以上位置,以降低现场作业难度,减少作业成本;采用节点分析法分析智能分采管柱的作用机理。该技术在渤海油田S井进行现场试验,试验结果表明:该井分舱砾石充填效率100%,智能滑套顺利实现中心平台远程控制;投产至今未出砂,日产油108 m^(3),超配产10%,实现了增储上产的目的。所得结果可为海上油田水平祼眼井分层开发提供新思路,为祼眼井控水技术提供新途径,为智能油田规模化建设提供新方式。

The efficient development of horizontal wells in Bohai oilfield is faced with challenges such as great difficulty in sand control and prominent high water cut,and the popularization of unmanned platforms has increased the demand for remote monitoring of production wells.Therefore,a subdivided sand control and intelligent separate zone production completion technology for horizontal open-hole wells was developed to meet the current production needs.A bypass isolation packer was introduced to design a one-trip multi-compartment gravel-pack string,and the dual isolation of the bypass isolation packer could effectively prevent interzonal cross flow and provide a good well-bore environment for intelligent separate zone production.The produced fluid flow channel of the intelligent sepa-rate zone production string was redesigned,and the hydraulically controlled intelligent sliding sleeve was optimized to the position above the top packer to reduce the field operation difficulty and cost.The nodal analysis method was used to analyze the mechanism of the intelligent separate zone production string.This technology was tested in Well S of Bohai oilfield.The test results show that the subdivided gravel packing effectiveness of the well is 100%,and the intelligent sliding sleeve successfully achieves remote control on central platform.Sand is not produced until now,with a daily oil production of 108 m^(3),exceeding the proration by 10%,achieving the goal of increasing re-serves and production.The research results provide new ideas for the separate zone development of horizontal open-hole wells in offshore oilfield,new approaches for water control technology of open-hole wells,and new ways for the large-scale construction of intelligent oilfields.