Solvent temperature: An injection condition to bring multiple changes in the heavy oil exploitation process based on the cyclic solvent injection (CSI) recovery method,Energy Science & Engineering

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Solvent temperature: An injection condition to bring multiple changes in the heavy oil exploitation process based on the cyclic solvent injection (CSI) recovery method
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2019-11-17 , DOI: 10.1002/ese3.540
Kewei Zhang _{1,

2} , Xinqian Lu ₂ , Xiang Zhou ₂ , Hongfeng Lu ₁ , Lilong Yang ₂ , Fanhua Zeng ₂

Affiliation

Heavy oil is a major fossil fuel resource to fulfill global growing fuel consumption. Hot solvent injection is an effective heavy oil production method. Hot solvent application feasibility has been previously compared between cyclic solvent injection (CSI) method and vapor solvent extraction (VAPEX) method where CSI method is advantageous in terms of oil recovery. However, previous studies have focused on the solvent temperature sensitivity analysis only in the VAPEX method. In this study, the solvent temperature study has been conducted discussing the multiple effects of temperature on both foamy oil and production performance in CSI method. A conventional CSI experiment (20°C) and two hot solvent‐based CSI experiments (55 and 70°C) are conducted. The results demonstrate that, although the oil recovery of three tests is close to each other, oil rate and foamy oil strength will increase with the solvent injection temperature during the high oil rate phase. However, at a high injection temperature level, the maintenance of foamy oil is difficult due to high‐temperature effect on foamy oil stability. Medium‐high temperature level (55°C) is considered optimal temperature regarding the solvent extraction efficiency based on the gross utilization factor data.

中文翻译：

溶剂温度：一种基于循环溶剂注入（CSI）回收方法在重油开采过程中带来多种变化的注入条件

重油是满足全球不断增长的燃料消耗的主要化石燃料资源。热溶剂注入是一种有效的重油生产方法。先前已经在循环溶剂注入（CSI）方法和蒸气溶剂萃取（VAPEX）方法之间比较了热溶剂应用的可行性，其中CSI方法在采油方面具有优势。但是，以前的研究仅在VAPEX方法中集中于溶剂温度敏感性分析。在这项研究中，已经进行了溶剂温度研究，以CSI方法讨论了温度对泡沫油和生产性能的多重影响。进行了常规CSI实验（20°C）和两个基于热溶剂的CSI实验（55和70°C）。结果表明，尽管三个试验的采油率彼此接近，在高油率阶段，油率和泡沫油强度将随着溶剂注入温度的增加而增加。但是，在高温下，由于高温对泡沫油稳定性的影响，泡沫油的维护非常困难。根据总利用率数据，中高温水平（55°C）被认为是与溶剂萃取效率有关的最佳温度。

更新日期：2019-11-17

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