کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8123411 | 1522512 | 2018 | 53 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Assessing low-maturity organic matter in shales using Raman spectroscopy: Effects of sample preparation and operating procedure
ترجمه فارسی عنوان
ارزیابی مواد آلی کم آبی در شیلات با استفاده از طیف سنجی رامان: تأثیر آماده سازی نمونه و روش عملیاتی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی اقتصادی
چکیده انگلیسی
Laser Raman spectroscopy is used to assess the thermal maturity of organic matter in sedimentary rocks, particularly organic-rich mudstones. However, discrepancies exist between quantified Raman spectral parameters and maturity values obtained by vitrinite reflectance. This has prevented the adoption of a standard protocol for the determination of thermal maturity of organic matter (OM) by Raman spectroscopy. We have examined the factors influencing the Raman spectra obtained from low-maturity OM in potential shale gas reservoir rocks. The inconsistencies in Raman results obtained are due to three main factors that are critically evaluated: (1) different operational procedures, including experiment setup and spectral processing methods; (2) different methods of sample preparation; (3) the analysis of diverse types of OM. These factors are scrutinized to determine the sources of inconsistency and potential bias in Raman results, and guidance is offered on the development of robust and reproducible analytical protocols. We present two new Raman parameters for un-deconvolved spectra named the DA1/GA ratio (area ratio of 1100-1400â¯cmâ1/1550-1650â¯cmâ1) and SSA (scaled spectrum area: sum of total area between 1100 and 1700â¯cmâ1) that offer potential maturity proxies. An automated spreadsheet procedure is presented that processes raw Raman spectra and calculates several of the most commonly used Raman parameters, including the two new variables.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Coal Geology - Volume 191, 15 April 2018, Pages 135-151
Journal: International Journal of Coal Geology - Volume 191, 15 April 2018, Pages 135-151
نویسندگان
Delano G. Henry, Ian Jarvis, Gavin Gillmore, Michael Stephenson, Joseph F. Emmings,