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3D CFD simulation of a horizontal well at pore scale for heavy oil fields
Journal of Petroleum Science and Engineering ( IF 5.168 ) Pub Date : 2020-07-21 , DOI: 10.1016/j.petrol.2020.107632
Andrés Pinilla , Miguel Asuaje , Camila Hurtado , Angela Hoyos , Luis Ramirez , Aaron Padrón , Nicolás Ratkovich

Water production in the oil industry has become so common that colloquial expressions such as “oil companies no longer produce oil, but water” have been unconsciously accepted in this industry. Nevertheless, water production is a serious issue in heavy oil fields with strong aquifers or fields under waterflooding for two reasons: It increases the costs affecting the economic viability of a project, and it has a serious environmental impact due to increasing energy consumption and CO2emissions. The root cause behind this problem is a phenomenon called Viscous Fingering, which appears mainly by the viscosity ratio between the phases. This study aims to understand better the Viscous Fingering phenomenon associated with a horizontal well in 3D. For the first time, a scaled horizontal well in a numerical constructed porous media was studied using a full 3D Computational Fluid Dynamics (CFD) model. The horizontal well was scaled using the Reynolds law of similarity from a real section of a horizontal well. While the porous media was made with the DEM physical model using spherical 7mmparticles, which allows reproducing rock properties such as permeability and porosity. This phenomenon was studied at three different scaled production rates, 1000, 1500, and 2000 bbl/d. Finally, three different oils were considered to study the influence of the viscosity ratio in the CFD modeling of the fingering. It was determined that CFD was capable of simulating Viscous Fingering for horizontal wells at the pore scale. Also, it could give information such as production and water cut-profiles, location and time of breakthrough, and specific locations of unrecoverable oil along the reservoir. The information given by the CFD approach could be useful for the development and improvement of completion and enhanced recovery techniques.



中文翻译:

稠油油田孔隙水平井水平井的3D CFD模拟

石油工业中的水生产已经变得如此普遍,以至于口语表达如“石油公司不再生产石油,而是水”在该行业中被无意识地接受。然而,在具有强含水层或注水油田的重质油田中,水的生产仍然是一个严重的问题,其原因有二:增加了影响项目经济可行性的成本,由于能源消耗的增加以及对环境的严重影响。 CØ2排放。该问题背后的根本原因是称为粘滞指法的现象,该现象主要由两相之间的粘度比引起。这项研究旨在更好地理解与3D水平井相关的粘性指法现象。首次使用完整的3D计算流体动力学(CFD)模型研究了在数值构造的多孔介质中的按比例缩放的水平井。水平井是使用雷诺兹相似定律从水平井的实际剖面中缩放的。多孔介质是使用球形的DEM物理模型制成的 7颗粒,可以重现岩石的特性,例如渗透率和孔隙率。在三种不同的规模生产速率1000、15002000 bbl / d下研究了这种现象。最后,考虑使用三种不同的油来研究粘度比对指法CFD模型的影响。可以确定CFD能够在孔尺度上模拟水平井的粘性指法。此外,它还可以提供诸如产量和含水率剖面,突破的位置和时间以及沿油藏无法开采的石油的特定位置等信息。CFD方法提供的信息可能对完井技术的开发和改进以及提高采收率技术很有用。

更新日期:2020-07-21
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