长庆特低渗裂缝发育油藏三维模型驱油实验研究

Oil Displacement Effect of Surfactant and/or Polymer on Three-dimensional Model in Ultra-low Permeability Fractured Reservoirs of Changqing Oilfield after Water Flooding

袁国伟 范 伟 徐飞艳 郑自刚 陈振波 张 英

YUAN Guowei FAN Wei XU Feiyan ZHENG Zigang CHEN Zhenbo ZHANG Ying

为真实模拟长庆特低渗透油藏渗流特征、 确定水驱后剩余油的合理挖潜方法， 采用人造微裂缝露头岩心与天然基质露头岩心并联的三维物理模型， 开展石油磺酸盐表面活性剂驱、 直链型聚合物驱和聚合物/表面活性剂二元驱驱油实验。研究结果表明， 三维非均质模型和实际油藏物性相近， 较好地模拟了油藏真实情况。与水驱相比， 裂缝层、 基质层和并联岩心模型表面活性剂驱分别提高采收率 2.65%、 2.72%和 2.67%， 聚合物驱分别提高采收率 5.65%、 3.32%和4.57%， 二元驱分别提高采收率 8.23%、 5.09%和 6.69%。与表面活性剂驱、 聚合物驱相比，二元驱提高采收率效果明显， 可望用于长庆油田水驱后驱油。图7表1参13

In order to simulate the characteristics of Changqing ultra-low permeability reservoir and determine the reasonable exploitation method of residual oil after water flooding，oil displacement experiments were carried out by petroleum sulfonate surfactant， linear polymer and polymer/surfactant binary flooding， using three-dimensional physical model of artificial micro-fractured outcrop core and natural matrix outcrop in parallel. The experiment results showed that the physical property of three dimensional heterogeneous model was similar to that of actual reservoir，and the real situation of reservoir was simulated well.Compared with water flooding，the enhanced oil recovery rate of surfactant flooding in fracture surface，matrix layer and parallel core model was 2.65%，2.72% and 2.67%，that of polymer flooding was 5.65%，3.32% and 4.57%，and that of polymer/surfactant binary flooding was 8.23%，5.09% and 6.69%，respectively. Compared with surfactant flooding and polymer flooding，polymer/surfactant binary flooding effectively enhanced oil recovery which was expected to be used for oil displacement after water flooding in Changqing oilfield.

10.19346./j.cnki.1000-4092.2017.03.024