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Composite Plugging Removal Technology and Application in Low Permeability Oilfield

机译：低渗油田复合堵漏技术及应用

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摘要

In an oilfield factory, the blocking and jam in Chang 2 reservoir is very serious. In recent years, according to analysizing different plugging mechanism and optimizing acidizing formula, the optimal plugging removal technology was formed suitable for the solution for the Chang 2 reservoir of oilfield factory. This plugging removal formula increases the efficiency radius, and increases the dosage of additives to protect the pipe, rod and pump from the precipitation such as Ca~(2+)and Mg~(2+), which causes new pollution. Reasonable multiple technologies were designed, and low displacement method was used in the injection process, aiming at the characteristics of Chang 2 reservoir. This method extends the time of plugging removal fluid staying around the well bore, which can eliminate plugging near well bore area effectively, and improve the permeability. DQ-1 composite plugging removal and other kinds of plugging removal methods have been used more than 50 times, and the effect is remarkable, which made a positive contribution to stable production of the oilfield.
机译：在某油田工厂中，长2油层的阻塞和堵塞非常严重。近年来，通过分析不同的堵漏机理，优化酸化配方，形成了适合于油田厂长2油层解决方案的最优堵漏去除技术。该堵塞消除公式增加了效率半径，并增加了添加剂的用量，以保护管道，杆和泵免受诸如Ca〜（2+）和Mg〜（2+）之类的沉淀物的影响，从而引起新的污染。针对长2储层的特点，合理设计了多种技术，并在注入过程中采用了低排量法。该方法延长了停留在井眼周围的去除液的堵塞时间，可以有效消除井眼附近区域的堵塞，提高了渗透率。 DQ-1复合堵漏清除方法及其他多种堵漏清除方法已使用50余次，效果显着，为油田稳定生产做出了积极贡献。

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  • 来源
  • 会议地点 Saipan(US)
  • 作者

    DENG Qiang; LIU Man; LU Xiao; Meng Xuangang; LI Jinling; CHEN Shijun; CHEN Gang;

  • 作者单位

    College of Chemistry and Chemical Engineering Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields Xi'an Shiyou University Xi'an China;

    Oil Production Plant No. 11 PetroChina Changqing Oilfield Company Xi'an China;

    Qilicun Oil Production Plant Yanchang Oilfield Company Yan'an China;

    College of Chemistry and Chemical Engineering Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields Xi'an Shiyou University Xi'an China State Key Laboratory of Petroleum Pollution Control CNPC Research Institute of Safety and Environmental Technology Beijing China;

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  • 关键词

    Composite plugging removal; Low permeability; Acidizing formula;

    机译：复合堵漏清除；低渗透性酸化配方;

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