中国石油勘探 ›› 2017, Vol. 22 ›› Issue (3): 113-118.DOI: 10.3969/j.issn.1672-7703.2017.03.014

• 工程技术 • 上一篇    

北特鲁瓦油田第一口长水平段水平井优快钻井技术

李万军1, 周海秋1, 王俊峰2, 陈忠祥3, 刘江波3, 顾亦新1   

  1. 1. 中国石油集团钻井工程技术研究院;
    2. 中国石油(土库曼斯坦)阿姆河天然气公司;
    3. 中油阿克纠宾油气股份公司
  • 收稿日期:2016-04-11 修回日期:2017-04-01 出版日期:2017-05-10 发布日期:2017-05-15

Application of optimized and fast drilling technology to the first long horizontalsection well in North Tluwa Oilfield

Li Wanjun1, Zhou Haiqiu1, Wang Junfeng2, Chen Zhongxiang3, Liu Jiangbo3, Gu Yixin1   

  1. 1. CNPC Drilling Research Institute;
    2. CNPC(Turkmenistan) Amu Darya Gas Company;
    3. CNPC(Aktobe) Oil and Gas Company
  • Received:2016-04-11 Revised:2017-04-01 Online:2017-05-10 Published:2017-05-15

摘要: 北特鲁瓦油田位于滨里海盆地东缘,其复杂碳酸盐岩油气藏普遍存在地质构造复杂、目的层边界和厚度变化大、下部高研磨性灰泥岩机械钻速低等突出问题;同时,为了增加单井产量,水平段长度由该油田常规的400m延伸至1000m,显著增大了井眼轨迹与井身质量控制的难度。为了攻克以上技术难题,开展了延长水平段钻井技术的集成与应用,形成了该地区以旋转导向、锥形齿钻头、探边技术为主的长水平段优快钻井技术。该技术在北特鲁瓦油田H814 井进行了首次试验应用,取得了较好的效果。其中,旋转导向钻井技术实现了目的层的旋转钻进,降低了钻井风险;锥形齿钻头实现了机械钻速提高一倍以上;探边技术实现了油气层的精准定位,使油层钻遇率由原来的55%提高到83.9%。鉴于滨里海盆地具有很强的地层规律性,所形成的优快钻井技术在全盆地其他油田具有较强的指导和借鉴意义,可全范围推广应用。

关键词: 海外复杂油气藏, 高研磨地层, 长水平段, 优快钻井, 旋转导向技术, 锥形齿钻头, 探边技术, 储层钻遇率

Abstract: In the North Tluwa Oilfield at the east margin of the Pre-Caspian Basin, the complex carbonate reservoirs are commonly characterized by complicated geological structure, variable boundary and thickness of target layers, and low ROP in lower highly-abrasive lime mudstone. In addition, for achieving higher production per well, the horizontal section of a horizontal well has been increased from 400 m to 1000 m, which brings great challenges to the control over borehole trajectory and quality. To cope with the challenges, integration and application of drilling technologies in a long horizontal-section well were carried out, and the optimized and fast drilling technology involving the rotary steerable drilling system, the Stinger bit and the PeriScope system was developed. This technology was firstly applied in Well H814 in the North Tluwa Oilfield with good results. Specifically, the rotary steerable drilling system made it possible for rotary drilling in the target layer and reduced drilling risks, the stinger bit realized a ROP more than doubled, and the PeriScope system provided precise localization of pay zones and improved the reservoir-encountered rate from 55% to 83.9%. The optimized and fast drilling technology can be promoted to other oilfields in the Pre-Caspian Basin where the strata are developed regularly.

Key words: complex reservoirs, highly-abrasive formation, long horizontal section, optimized and fast drilling technology, rotary steerable drilling system, Stinger bit, PeriScope, reservoir-encountered rate

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