三塘湖致密油长水平段水平井钻井技术

Drilling technology for horizontal well with long horizontal sectionin Santanghu tight oil reservoir

三塘湖盆地致密油勘探开发前景广阔,水平井技术是实现该区有效开发的重要手段。从分析三塘湖致密油水平井钻井难点出发,开展了以井身结构优化及剖面设计、个性化钻头优选、低成本高效轨迹控制、提高水平段储层钻遇率及优质高效钻井液等关键技术为核心的攻关研究,形成了适应三塘湖致密油水平井优快钻进的配套技术系列,并在芦101等5口井进行了成功推广应用,提速效果显著。

Tight oil exploration in Santanghu Basin enjoys a broad prospect, and horizontal well technology is an important means for effective development of this region. This paper started with analysis of dififculties in horizontal well drilling in Santanghu tight oil formation and carried out research on key techniques such as wellbore conifguration optimization and proifle design, speciifc drilling selection, low-cost and high-efifcient trajectory control, increasing the encountering rate of reservoirs by horizontal section and quality, and effective drilling lfuid, etc. The paper has also developed supporting technique series suitable for optimized fast drilling of tight oil horizontal wells in Santanghu Basin, which has been successfully used in ifve wells like Well Lu 101 and realized remarkable increase in drilling rate.