高含水油田调驱体系不同阻力特性见效特征研究

Research on the Effective Features of Profile-modifying in High Water Cut Oilfield

长期注水开发导致国内多数油田已进入高含水期,调驱技术是现阶段改善和提高水驱开发油田采收率的重要技术之一。因此认识调驱技术的见效特征是进一步优化调驱方案以及调驱开发效果评价的基础工作。深入调研了凝胶调驱机理及其应用现状,分析影响不同油藏调驱效果的主控因素。应用核磁共振测量技术和微观可视化技术对调驱体系(包括聚合物凝胶、毫米级微球凝胶和微米级微球凝胶)在不同阻力特性见效特征进行实验研究。研究得出聚合物凝胶堵剂调驱效果优于其他两种微球堵剂,而且合理组合段塞可以有效提高调驱效果,为油田进一步优化调驱方案提供了依据。

Many oilfields have entered into the high water-cut stage as a result of long-term water flooding, profile-modifying is one of the important technologies to improve and enhance oil recovery of water flood oilfield. Recognizing the effective feature of profile-modifying is the basic work for further optimizing profile-modifying plan and evaluating development effect. Gel profile-modifying mechanism and its application situation were deeply researched, and analyzed the controlling factors, which have an effect on different reservoirs. Use nuclear magnetic resonance measurement technology and microcosmic visualization technology to study the effective features of drive system （ including polymer gel, millimeter level microsphere gel and micron level microsphere gel） , which experimented by different resistance characteristic. Research suggests that the flooding effect of polymer gel is superior to the two kinds of microsphere gels, and reasonable combination of slug can effectively improve the flooding effect, so as to provide basis to further optimize flooding plan for oilfield.