一种理解水在原位燃烧采油过程中氧化和升级反应中的作用的新方法,B部分:解释

IF 2.1 4区 工程技术 Q3 ENERGY & FUELS
M. Fassihi, A. Alamatsaz, R. Moore, S. Mehta, M. Ursenbach, D. Mallory, P. Pereira Almao, S. C. Gupta, H. Chhina
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引用次数: 1

摘要

为了解原生水在烟油高温氧化升级过程中作为氢源的作用,利用锥形管进行了两种不同的原位燃烧实验,分别以重水(D2O)和O-18富集水(H2O18)作为原生水。除了对这些反应在原位燃烧中的作用有了基本的了解外,研究结果还可能有助于优化原位制氢和重质油和沥青油的升级。锥形管以前被用于了解空气通量对维持燃烧前缘的影响(请参见Alamatsaz et al. 2011, 2012)。在这些测试中,与原始沥青的API度9°相比,生产的API度达到35°,效果显著。用质谱仪分析了产出流体(气体和水),以证明在沥青升级反应中使用D2O和H2O18作为示踪剂的有效性,特别是确定H2O18在理解原生水的作用方面是否比D2O更有效。研究发现,重水与沥青中的氢原子在混合过程中容易发生交换。因此,它不能可靠地用作确定水的作用的指标。然而,用O-18富集的水运行,提供了一个更好的指示水参与氧化反应。从第二次测试中收集的演化气体和水样的质谱分析结果表明,水在反应过程中确实发生了分裂,原生水分子中的O原子确实与(来自碳氢化合物的)C原子结合形成了二氧化碳。这些发现为围绕原位燃烧和原位升级反应过程的机理考虑开辟了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Novel Approach in Understanding the Role of Water in Oxidation and Upgrading Reactions during In-Situ Combustion Oil Recovery, Part B: Interpretations
To understand the role of connate water as a source of hydrogen in oxidation and upgrading of bituminous oil at high temperature, heavy water (D2O) and O-18 enriched water (H2O18) were used as connate water in two different in-situ combustion experiments using a conical tube. Aside from a fundamental understanding of the role of such reactions in in-situ combustion, the results could also potentially help in optimizing in-situ hydrogen generation and upgrading of heavy and bituminous oil. The conical tube had previously been used for understanding the impact of air flux in sustaining the combustion front (please see Alamatsaz et al. 2011, 2012). Significant upgrading was observed in these tests with a produced API gravity of 35 °API compared to the original bitumen gravity of 9 °API. The produced fluids (gases and water) were analyzed with a mass spectrometer to demonstrate the effectiveness of using D2O and H2O18 as tracers in bitumen upgrading reactions and specifically to determine whether the H2O18 would be more effective than D2O in understanding the role of connate water. It was found that heavy water exchanges too readily with hydrogen atoms in the bitumen when the two are mixed. As a result, it could not be reliably used as an indicator for identifying the role of water. The run with O-18 enriched water, however, provided a better indication of water participation in the oxidation reactions. The results obtained from the mass spectrometry analysis of evolved gases and water samples collected in the second test showed that water does split during the reaction and O atoms of indigenous water molecules do combine with C atoms (from the hydrocarbon) to form CO2. These findings open the path for mechanistic considerations around the processes taking place during in-situ combustion and in-situ upgrading reactions.
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来源期刊
CiteScore
5.30
自引率
0.00%
发文量
68
审稿时长
12 months
期刊介绍: Covers the application of a wide range of topics, including reservoir characterization, geology and geophysics, core analysis, well logging, well testing, reservoir management, enhanced oil recovery, fluid mechanics, performance prediction, reservoir simulation, digital energy, uncertainty/risk assessment, information management, resource and reserve evaluation, portfolio/asset management, project valuation, and petroleum economics.
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