转向剂/乳化剂复合体系的深部调剖性能

Deep Profile Control Performance of Steering Agent /Emulsifier Composite System

王威 卢祥国 刘长龙 陈征 李彦阅 吕金龙 曹伟佳 徐元德

WANGWei LU Xiangguo LIU Changlong CHEN Zheng LI Yanyue LYU Jinlong CAOWeijia XU Yuande

渤海油藏稠油丰富但非均质性严重，水驱开发效果较差，单独使用颗粒转向剂或稠油乳化剂提高采收率效 果不理想。利用室内评价方法开展了对渤海LD5-2 稠油油藏稠油乳化剂与聚合物微球和冻胶分散体等颗粒转 向剂复配体系性能及转向效果的研究和机理分析。结果表明，聚合物微球初始粒径中值为8.7～9.2 μm，膨胀倍 数为2.5～3.0，冻胶分散体外观呈现不规则形态，缓膨效果不明显。转向剂颗粒吸附表面活性剂致使稠油乳化剂 有效含量减少，乳化降黏效果变差，但当油与降黏体系的质量比达到6∶4 时仍具有较好的降黏效果。与单独使用 颗粒转向剂相比，“稠油乳化剂/颗粒转向剂”二元复合体系中的颗粒转向剂具有良好的抗剪切性、注入性及深部 调驱能力。对于存在大孔道或特高渗透条带油藏，颗粒转向剂必须与强凝胶结合使用，发挥微观和宏观液流转 向协同效应。

Based on the problems of rich heavy oil，serious heterogeneity and poor water drive development effect in Bohai reservoir，it is not ideal to using particle diversion agent or heavy oil emulsifier alone to enhance oil recovery. The performance of the complex system of emulsifier，polymer microspheres and gel dispersions for heavy oil in LD5-2 heavy oil reservoir in Bohai Sea and the effect of liquid flow diversion were studied by means of laboratory evaluation. The results showed that the median initial particle size of polymer microspheres was 8.7—9.2 μm and the expansion ratio was 2.5—3.0. The dispersion of gel dispersions showed irregular morphology in vitro，and the retarding swelling effect was not obvious. The adsorption of surfactant to diverter particles reduced the effective content of emulsifier in heavy oil and the effect of emulsification and viscosity reduction became worse. However，when the mass ratio of oil to viscosity reduction system reached up to 6∶4，it still had a good viscosity reduction effect. Compared with the particle steering agent alone，the particle steering agent in the binary composite system of heavy oil emulsifier/particle steering agent had good shear resistance，injectability and deep profile control and displacement ability. For reservoirs with large channel or extra high permeability，granular diversion agents must be combined with strong gel to exert synergistic effect of micro and macro fluid diversion.

10.19346/j.cnki.1000-4092.2023.03.007