Editorial office of ACTA PETROLEI SINICA ›› 2008, Vol. 29 ›› Issue (1): 79-83.DOI: 10.7623/syxb200801017

• Oil Field Development • Previous Articles     Next Articles

Characteristics and action mechanism of the flexible agent applied in fluid diversion of reservoirs

ZHU Huaijiang1, CHENG Jiecheng2, SUI Xinguang2, WANG Pingmei1, ZHAO Qingdong2, LI Yikun1, LIU Qiang1, YAO Bo2   

  1. 1. PetroChina Exploration and Development Research Institute, Beijing 100083, China;
    2. PetroChina Daqing Oilfield Limited Company, Daqing 163712, China
  • Received:2007-04-15 Revised:2007-07-30 Online:2008-01-25 Published:2010-05-21

柔性转向剂性能及作用机理研究

朱怀江1, 程杰成2, 隋新光2, 王平美1, 赵庆东2, 李宜坤1, 刘强1, 姚波2   

  1. 1. 中国石油勘探开发研究院, 北京, 100083;
    2. 中国石油大庆油田有限责任公司, 黑龙江大庆, 163712
  • 作者简介:朱怀江,男,1956年6月生,1982年毕业于浙江大学高分子化学专业,现为中国石油勘探开发研究院采油所高级工程师,主要从事提高原油采收率和采油化学剂的开发应用研究.E-mail:zhu_hj0309@hotmail.com
  • 基金资助:
    国家重大基础研究发展规划(973)项目(2005CB221300)“化学驱和微生物驱提高石油采收率的基础研究”部分研究成果

Abstract: In order to restrict injection water flowing through high-permeability zones and improve fluid flow field in water flooding reservoirs,a kind of flexibile agent SR-3 was developed for getting diversion of deep flooding fluid.The SR-3 with high chemical stability and good toughness could be deformed randomly.The physical simulation in laboratory showed that the SR-3 could migrate through channels in high-permeability zones,which resulted in profile control along the track of the SR-3 particles.The SR-3 flowing in the channels of high-permeability zone can be deformed and produce a plugging pressure when it meets pore throat.The SR-3 will creep through the channels as the flow pressure increases to a breakthrough point,then it flows towards a balance with pressure drop.Afterwards,the SR-3 particles will repeat similar processes along the channels in high-permeability zones,which results in a dynamic plugging in deep reservoir.A pilot test of the flexible agent injected into an oil layer in the east part of Daqing Oilfield validated above mechanism and also demonstrated that the channels and high-permeability zones were produced along the primary route with long period water flooding in fissureless sandstone reservoirs.The sweep efficiency of water flooding can be improved greatly if the dynamic plugging happens along the channels.

Key words: water-flooding reservoir, high-permeability zone, deep flooding fluid, flexible agent, toughness, viscoelasticity, dynamic plugging

摘要: 为了遏制水驱油藏注入水通过高渗透部位时出现无效循环,研制了柔性转向剂(代号SR-3),用于改变油藏中水的流场及实现深部液流转向。这种柔性转向剂可随机发生形变,具有韧性好、不易破碎和断裂以及化学稳定性高的特点。室内物理模拟显示:SR-3转向剂能在地层高渗透率区大孔道中运移,可实现沿程调剖,SR-3在地层"大孔道"中流动遇阻时发生形变并产生堵塞压力。随压力的升高,SR-3蠕变并出现突破压力,然后又降至流动压力并趋于平衡;再遇阻又发生形变并产生堵塞,如此反复地在地层深部产生动态堵塞。大庆油田东部萨尔图和葡萄花油层的柔性转向剂现场试验验证了此机理,也说明了无裂缝砂岩油藏经长期注水开发,在水驱主流道可能冲刷出了大孔道高渗透带。对这些大孔道进行沿程堵塞,可以大幅度地改善水驱波及系数。

关键词: 水驱油藏, 高渗透区, 深部液流, 柔性转向剂, 韧性, 黏弹性, 动态堵塞

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