预成型颗粒凝胶与碱-表面活性剂-聚合物复合体系提高非均质油藏采收率的实验研究

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-07-11 DOI:10.1115/1.4062928
Yanfu Pi, Zhihao Li, Li Liu, R. Cao, Jinxin Liu, Haosong Chen, Xinyu Fan, Mingjia Zhao
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引用次数: 0

摘要

非均质性是聚合物驱后油藏的一个重要特征,这给非均质油藏进一步提高采收率带来了挑战。为了进一步提高聚合物驱后油藏的采收率,采用预成型颗粒凝胶(PPG)和碱性表面活性剂聚合物体系(ASP体系)开发了一种新型的提高采收率体系(ASP-PPG复合体系)。我们设计了一个含油饱和度监测装置和一个大型三维非均质物理模型来评估系统的性能。对系统和ASP系统的性能进行了测试。基于测试结果,利用含油饱和度监测装置和三维物理模型,研究了ASP-PPG系统在实际非均质油藏中的流体运移模式和强化采油机理。实验结果表明,ASP-PPG体系比ASP体系具有更高的粘度和更好的调剖能力。此外,界面张力可以保持在低水平,约10-3mN/m。三维非均质物理模型驱油实验表明,PPG具有良好的弹性变形能力,可以动态封堵聚合物驱后形成的大孔隙,有效改善储层的非均质性。注入ASP-PPG体系后,模型的采收率提高了15.8%,其中高、中、低渗层的波及系数分别提高了4.36%、19.6%和37.55%。此外,驱油效率分别提高了7.4%、14.4%和17.9%。这些结果突出了PPG和ASP体系的协同作用,显著提高了聚合物驱后非均质油藏的采收率。
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Experimental Investigation of preformed particle gel and Alkali-Surfactant-Polymer Composite System for Enhanced Oil Recovery in Heterogeneous Reservoirs
Heterogeneity is a significant feature of the reservoirs after polymer flooding, resulting in challenges for further enhanced oil recovery (EOR) in heterogeneous reservoirs. In order to further improve oil recovery in the reservoirs after polymer flooding, a novel EOR system (ASP-PPG composite system) was developed using preformed particle gel (PPG) and alkali-surfactant-polymer system (ASP system). We designed an oil saturation monitoring device and a large-scale 3D heterogeneous physical model to evaluate the performance of the system. The performance of the system and the ASP system were tested. Based on the testing results, the fluid migration patterns and enhanced oil recovery mechanisms of the ASP-PPG system in an actual heterogeneous reservoir were investigated using the oil saturation monitoring device and the 3D physical model. Experimental results indicate that the ASP-PPG system has a higher viscosity and better profile control ability than the ASP system. Additionally, the interfacial tension can be maintained at a low level, around 10-3 mN/m. Flooding experiments using the three-dimensional heterogeneous physical model demonstrated the excellent elastic deformation ability of PPG, which can dynamically block the large pores that formed after the polymer flooding and effectively improve the heterogeneity of reservoirs. After injecting the ASP-PPG system, the recovery factor of the model increased by 15.8%. Specifically, the sweep coefficient of high, medium, and low permeability layers increased by 4.36%, 19.6%, and 37.55%, respectively. Moreover, the oil displacement efficiency increased by 7.4%, 14.4%, and 17.9%, respectively. These results highlight the synergistic effect of combining PPG and ASP systems, significantly enhancing heterogeneous reservoir recovery after polymer flooding.
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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