The ternary combination of polymer gel, microsphere and surfactant for conformance control and oil displacement to improve oil recovery in strong heterogeneous reservoir

Q1 Earth and Planetary Sciences Petroleum Research Pub Date : 2023-06-01 DOI:10.1016/j.ptlrs.2022.04.002

Siqi Liu , Hu Jia , Hongshen Wang , Yanbin Liang , Duansheng Shi , Zhichong Lu , Junyi Wu

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引用次数: 2

Abstract

The reservoir heterogeneity of Suizhong 36-1 oilfield is very obvious, the average permeability reaches 2000mD. Long-term water injection development leads to serious water channeling in high permeability layers, resulting in ineffective circulation of injected water and reduction of oil recovery. It is urgent to form an effective EOR method. In this paper, the oil displacement effect of different combination slugs including polymer gel, polymer microsphere and surfactant is evaluated by means of conformance control and chemical flooding. Three-layer heterogeneous 3-D plate model is used for oil displacement experiment. The experimental results show that the combination slug sequentially composed of polymer gel, polymer microspheres and surfactant have the best oil displacement effect with the oil recovery increment by 21.2% after the first water flooding. In addition, using the best slug combination for two rounds flooding, the recovery factor increased by 28.2% compared with the first water flooding. This paper provides some new insights for enhanced oil recovery in strong heterogeneity reservoir.

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聚合物凝胶、微球和表面活性剂的三元组合，用于控制顺性和驱油，提高强非均质油藏的采收率

绥中36-1油田储层非均质性非常明显，平均渗透率达到2000mD。长期注水开发导致高渗透层水窜严重，导致注入水循环无效，降低采收率。迫切需要形成一种有效的EOR方法。本文采用一致性控制和化学驱的方法，评价了聚合物凝胶、聚合物微球和表面活性剂等不同组合段塞的驱油效果。采用三层非均质三维板模型进行驱油实验。实验结果表明，聚合物凝胶、聚合物微球和表面活性剂组成的组合段塞驱油效果最好，首次注水后采油率提高21.2%。此外，采用最佳段塞组合进行两轮驱，采收率比第一次水驱提高了28.2%。本文为在强非均质性油藏中提高采收率提供了一些新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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