A new reaction model for low temperature oxidation of heavy oil: Experiments and numerical modeling
A new reaction model for low temperature oxidation of heavy oil: Experiments and numerical modeling
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DOI：
10.1016/j.energy.2013.11.024
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发表时间：
2014
期刊：
影响因子：
9
通讯作者：
Z. Khansari;Punitkumar R. Kapadia;N. Mahinpey;I. Gates
中科院分区：
文献类型：
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作者：
Z. Khansari;Punitkumar R. Kapadia;N. Mahinpey;I. Gates
ISC（in situ combustion）基于提高稠油采收率是复杂的，因为有许多化学反应同时发生。复杂性的产生是由于大量的组分通过许多不同的反应路径反应，其中地质和油饱和度在储层内空间上变化。众所周知，ISC中发生的反应主要有四类：LTO（低温氧化）、HTO（高温氧化）、TC（热裂解）和水热裂解。在储层内，在ISC期间，LTO和TC反应通过为HTO提供燃料而发挥主要作用。在文献中的许多反应方案中，LTO间隔被认为是跨越单个温度范围的单个反应区。在这项工作中，提出了一种新的反应方案的基础上分析先前公布的热重数据，其中的LTO反应温度范围被分成四个温度子范围，每个子范围有自己的主导反应产物。新的反应模型在一个数值模型中实现，该模型显示它能够代表四个LTO温度子范围。相比之下，使用先前公布的具有单一温度范围的LTO反应模型的数值模型不能代表LTO的行为。
ISC (in situ combustion) based enhanced heavy oil recovery is complex because there are numerous chemical reactions taking place simultaneously. The complexity arises due to the immense number of components reacting through many different reaction paths where the geology and oil saturation vary spatially within the reservoir. It is known that there are four major classes of reactions taking place within ISC: LTO (low temperature oxidation), HTO (high temperature oxidation), TC (thermal cracking), and aquathermolysis. Within the reservoir, during ISC, LTO and TC reactions play a major role by providing fuel for HTO. In many reaction schemes in the literature, the LTO interval is considered as a single reactive zone spanning a single temperature range. In this work, a new reaction scheme is proposed based on analysis of previously published thermogravimetric data where the LTO reaction temperature range is separated into four temperature subranges each with its own dominant reaction products. The new reaction model was implemented in a numerical model that revealed that it was able to represent the four LTO temperature subranges. In comparison, a numerical model using a previously published LTO reaction model with a single temperature range was not able to represent the behavior of LTO.