聚合物传输运移能力与驱油效果关系研究

Study on the Relationship between Polymer Transport Capacity and Oil Displacement Effect

栾鹏飞 卢祥国 曹伟佳 郑凯亓

Pengfei Luan Xiangguo Lu Weijia Cao Kaiqi Zheng

东北石油大学 提高油气采收率教育部重点实验室，黑龙江 大庆 163318

Key Laboratory of Enhanced Oil and Gas Recovery（Ministry of Education），Northeast Petroleum University，Daqing Heilongjiang 163318，China

聚合物在多孔介质内扩大注入水波及体积是聚驱提高采收率的主要机理。考察了聚合物的传输运移和驱油效果。结果表明，聚合物驱油剂黏度与驱油效果不存在正相关性，等质量浓度的“抗盐”聚合物黏度（52.4 mPa?s）高于“高分”聚合物黏度（35.6 mPa?s），但与储层孔喉结构配伍性、注入性和抗剪切性差；“抗盐”聚合物驱替整体采收率增幅（6.94%）低于“高分”聚合物驱替整体采收率增幅（18.94%），与等黏度或等质量浓度的“高分”聚合物相比，“抗盐”聚合物的扩大波及体积能力差。

The expansion of the swept volume of injected water by polymers in the porous medium is the main mechanism for polymer flooding to increase oil recovery.The transport of polymer and the oil displacement effect were investigated.Experiments have shown that there is no positive correlation between the viscosity of the polymer flooding agent and the oil displacement effect.The viscosity of the salt?resistant polymer (52.4 mPa?s) is higher than that of the "high?resolution" polymer (35.6 mPa?s ),but it has poor compatibility with the pore?throat structure of the reservoir and poor injection and shear resistance.The oil displacement experiments demonstrate that the overall recovery increase by salt?resistant polymer flooding (6.94%) is lower than that of "high score" polymer flooding (18.94%). Therefore, compared with the "high?score" polymer of "equal viscosity" or "equal concentration", the salt?resistant polymer has a worse ability to expand the swept volume.

国家自然科学基金面上项目(51574086);“十三五”国家重大专项子课题(2016ZX05058?003?010)

10.3969/j.issn.1006-396X.2022.04.010