...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >~1H NMR spectroscopy and low-field relaxometry for predicting viscosity and API gravity of Brazilian crude oils - A comparative study
【24h】

~1H NMR spectroscopy and low-field relaxometry for predicting viscosity and API gravity of Brazilian crude oils - A comparative study

机译：〜1H NMR光谱和低场弛豫法可预测巴西原油的粘度和API重力-对比研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

~1H NMR spectra and transversal relaxation time (T_2) distributions of 76 Brazilian crude oil samples, ranging from light to extra-heavy, were measured and compared by Hierarchical Clustering Analysis (HCA) and Principal Component Analysis (PCA). Partial Least Squares Regression (PLSR) models were developed to predict crude oil viscosity and density in terms of the American Petroleum Institute (API) gravities derived from their individual NMR responses. Relaxation-based models delivered better predictive performances for both viscosity and API, with a standard error of prediction (SEP) of 0.220 log cP and 1.027 °API. In addition, the synergistic effect between the two distinct NMR responses was evaluated for the first time by merging spectra and relaxation data into a single PLSR model. This hybrid spectra-relaxation model delivered superior performance compared to stand-alone models, with an SEP of 0.186 log cP and 0.811 °API.
机译：通过分层聚类分析（HCA）和主成分分析（PCA）测量并比较了76份巴西原油样品的1H NMR光谱和横向弛豫时间（T_2）分布，从轻到超重。开发了偏最小二乘回归（PLSR）模型以根据美国石油协会（API）重力得出的原油粘度和密度，这些重力和密度是根据它们各自的NMR反应得出的。基于松弛的模型提供了更好的粘度和API预测性能，预测标准误差（SEP）为0.220 log cP和1.027°API。此外，通过将光谱和弛豫数据合并到一个PLSR模型中，首次评估了两个不同的NMR反应之间的协同效应。与独立模型相比，此混合频谱松弛模型提供了卓越的性能，其SEP为0.186 log cP和0.811°API。

著录项

  • 来源
    《Fuel》 |2014年第15期|126-134|共9页
  • 作者

    Asif Muhammad; Rodrigo Bagueira de Vasconcellos Azeredo;

  • 作者单位

    Universidade Federal Fluminense, Instituto de Quimica, Outeiro de Sao Joao Batista s°, CEP: 24020-150 Niteroi, RJ, Brazil;

    Universidade Federal Fluminense, Instituto de Quimica, Outeiro de Sao Joao Batista s°, CEP: 24020-150 Niteroi, RJ, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Viscosity; Density; API gravity; Crude oil; NMR;

    机译：粘度;密度;API重力原油;核磁共振;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号