缔合聚合物在低渗透油层中驱油研究

Experimental research on associated polymer flooding in low permeability oil layers

张云善 李华斌 孙会来 蔡新丽

Zhang Yunshan Li Huabing Sun Huilai Cai Xinli

西南石油大学·油气藏地质及开发工程国家重点实验室, 四川成都 610500

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation·Southwest Petroleum University, Chengdu 610500

针对低渗透油层能否进行缔合聚合物驱的问题, 运用室内物理模拟实验对9块渗透率小于100×10-3μm2的不同岩心进行了研究。结果表明缔合聚合物在低渗透油层中具有一定的驱油效果。确定了适合缔合聚合物在低渗透油层中驱油的最低渗透率临界值40×10-3μm2;同时在相同的渗透率条件下, 加大注入量能使缔合聚合物在低渗油层中驱油的采收率提高幅度更大, 并且在要达到相同的提高采收率值的情况下, 加大注入量的油层适应范围更宽。该结论为低渗透油藏进行缔合聚合物驱的决策提供了重要参考。

In order to know whether the low permeability oil layer can be done associated polymer oil displacement or not, the indoor physical simulation test has be done to 9 sample cores whose permeability are less than 100×10-3μm2. The result shows there are certain effect in low permeability reservoir, and define the lowest permeability of reservoir can be done associated polymer oil displacement is 40×10-3μm2, and in the same permeability, the larger the injection of associated polymer, the more the oil recovery. These conclusions provide important references for doing associated polymer oil displacement in low permeability reservoirs.