Average molecular parameters of heavy crude oils and their fractions using NMR spectroscopy

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• 作者：Juan C. Poveda^a ; ^b ; ^{jkclimb@fis.unam.mx} ; Daniel R. Molina^b
• 关键词：Compositional simulations ; Reservoir simulation/numerical modeling ; Heavy oil ; Asphaltenes ; Nuclear magnetic resonance ; Average molecular parameters
• 刊名：Journal of Petroleum Science and Engineering
• 出版年：2012
• 期刊代码：33_09204105
• 类别：pw
• 出版时间：April, 2012
• 卷：84-85
• 期：Complete
• 页码：1-7
• 文件大小：215 K

摘要

In this work, a new procedure for obtaining a full set of average molecular parameters (AMPs) of heavy crude oils and their fractions is proposed. Initially, a definition of the nomenclature for the identification of structural groups is presented, followed by the development of the scheme to obtain the AMPs. Corrections to parameters f_a, R_N, R_T, , which are common in the literature, and new parameters for samples with a high grade of aromatic condensation and alkyl ramification, 畏, 蠒, and 尉, are revisited. The aromatic factor, f_a, has been revised in detail to include the heteroaromatic species sulfur, nitrogen, and oxygen, which were not considered in any previous work. This new procedure allows the calculation of the AMPs from convenient analytical data, including the average molecular weight, elemental analyses results, and ¹H- and ¹³C-NMR spectroscopy data.