文章摘要
一种高渗非均质砂岩储层暂堵体系的制备及性能评价*
Preparation and Property Evaluation of the Temporary Plugging System for High PermeabilityHeterogeneous Sandstone Reservoir
  
DOI:10.19346/j.cnki.1000-4092.2020.02.007
中文关键词: 高渗非均质  砂岩储层  Bola表面活性剂  离子聚合物  暂堵  低伤害
英文关键词: high permeability heterogeneous  sandstone reservoir  Bola-surfactant  ionic polymer  temporary plugging  low damage
基金项目:“十三五”国家科技重大专项“丝绸之路经济带大型碳酸盐岩油气藏开发关键技术”(项目编号2017ZX050030)。
作者单位
杜 娟1,刘金明1,赵立强1,苟利鹏2,向 坤1,刘平礼1 (1. 油气藏地质及开发工程国家重点实验室(西南石油大学)四川 成都 6105002. 中国石油长庆油田分公司第五采油厂 陕西 西安 710200) 
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中文摘要:
      针对高渗非均质砂岩储层酸化效果差、酸化转向困难的问题,首先对聚丙二醇醚化反应制备离子型Bola表 面活性剂BS(聚丙二醇二羧酸钠),然后将阳离子胍胶(羟丙基三甲基氯化铵胍胶CG)和Bola表面活性剂BS自 组装成超分子凝胶BSP体系。通过黏度变化特征优化了BSP体系形成凝胶的最佳条件,采用流变仪测试了体系 的流变性及剪切修复性,采用并联岩心流动实验测试了体系的酸化转向效果,通过SEM分析了BSP体系的酸化 转向机理。研究结果表明,转向BSP体系的黏度随温度升高呈现出驼峰现象,剪切后的黏度具有良好的自组装 修复性能。非均质性严重的储层,酸化时低渗层难以被改造。BSP体系具有良好的暂堵转向效果,转向剂BSP 体系的注入可有效减少酸液在高渗层的滤失,并有效动用低渗层。BSP体系在不同的pH值下呈现网状和超分 子微球形态,有助于酸化过程中实现暂堵与清洁的功能。图10表1参15
英文摘要:
      For these problems of poor acidizing effect and difficult acidizing diversion in high permeability heterogeneous sandstone reservoirs,the ionic Bola surfactant(BS)(sodium polypropylene glycol dicarboxylate)was prepared by etherification reaction of polypropylene glycol,and a cationic guar(hydroxypropyl trimethylammonium chloride guar)and BS were assembled into a supramolecular gel BSP system. The optimal conditions for gel formation of BSP system were obtained by analyzing the viscosity change characteristics. Theological characteristics and shear repairability of the BSP system were tested by rheometer. Acidification diversion effect of the system was tested by parallel core flow experiment,and the mechanism was probed by SEM. The results showed that the viscosity of the BSP system exhibited“hump phenomenon”with temperature rose,and had excellent self-assembly recovery performance of viscosity after shearing. It is difficult to stimulation the low permeability area when acidizing the reservoir with serious heterogeneity. BSP system had excellent temporary plugging and diverting effect,during acidification,the injection of BSP system could effectively reduce the filtration loss of acid solution in high permeability area and effectively start the low permeability area. The BSP showed network structure and supramolecular microspheres at different pH values,which was helpful to realize the temporary plugging and cleaning.
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