绥中36－1油田氮气泡沫逐级调驱实验研究

摘要

The heterogeneity of multi layer sandstone reservoir heterogeneity is serious, Large section and small layer general water injection water along the high permeability layer, Using nitrogen foam flooding can effectively improve the injection profile.Based on the previous experimental research on double tube, a new experimental method for the application of the three tube parallel displacement injection foam step by step , Focus on the effect of different permeability difference, the same permeability difference of different permeability level and gas-liquid ratio on nitrogen foam profile displacement.The results show that the foam can effectively play a role in regulating the flow of the fluid after nitrogen foam, so that the production of high permeability, medium and low permeability is uniform, which reflects the characteristics of“grading and plugging, step by step”.It has some reference value for the development of this kind of reservoir.%多层砂岩油藏非均质严重，大段多小层笼统注水时注入水沿高渗透层窜流；利用氮气泡沫驱可有效改善注入剖面。在前人双管实验研究的基础上，创新提出应用三管并联驱替注泡沫逐级调驱的实验方法，重点研究了不同渗透率级差、相同渗透率级差不同渗透率级别和气液比对氮气泡沫调驱效果的影响。研究结果表明经过氮气泡沫调驱后，泡沫有效发挥了调整分流作用，使高渗管、中渗管和低渗管的产液量趋于均匀，体现了“分级堵调、逐级启动”的特性，有效改善了非均质储层的开发效果，对该类油藏的高效开发有一定的借鉴意义。