Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.coal.2017.09.004 |
Modified RGB-based kerogen maturation index (KMI): Correlation and calibration with classical thermal maturity indices | |
Tahoun, Sameh S.1; Deaf, Amr S.2; Gentzis, Thomas3; Carvajal-Ortiz, Humberto3 | |
通讯作者 | Tahoun, Sameh S. |
来源期刊 | INTERNATIONAL JOURNAL OF COAL GEOLOGY
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ISSN | 0166-5162 |
EISSN | 1872-7840 |
出版年 | 2018 |
卷号 | 190页码:70-83 |
英文摘要 | Thirty-eight cutting samples from the Lower Jurassic to the Upper Cretaceous succession of the Abu Tunis-1X well, north Western Desert of Egypt, were processed palynologically to extract their psilate sporomorphs. This designated practice was made to assess the digitally-quantified progressive changes in the triple Red-Green-Blue (RGB) coloration of sporomorph exine with depth. Stabilization and calibration of the illumination system was applied. Certain precautions were also implemented prior to such digital RGB measurements; for example, some exceptionally lighter (caved) or darker (reworked) specimens were excluded from RGB coloration population samples to avoid misleading results. A minimum of three and up to ten spore grains were studied according to the sample richness and two RGB readings were taken for each selected specimen. The average, standard deviation, and confidence level values for each sample were calculated due to the variable palynological productivity of the samples. In the present study, an attempt was made to monitor and distinguish which of the color components and/or parameters is the most sensitive detector of the progressive maturation changes with depth. By investigating the trends of different parameters of the RGB (Le. total RGB, R, G, B, R/G) with depth, we were able to distinguish and deduce a linear maturation index from the triple RGB readings. Such a linear maturation index was based on the R component and was successfully correlated and calibrated with other conventional, linear maturity indices (T-max degrees C, vitrinite reflectance-VRo%, and thermal alteration index-TAI). The newly modified, RGB-based maturation index called the Kerogen Maturity Index (KMI) can confidently and effectively detect the subtle and progressive changes in kerogen maturation with depth. Such correlation and calibration practices presented herein enabled us to present a modern, reliable, easy to use, and inexpensive measuring technique to assess the thermal maturity of organic matter. The KM covers the immature and most of the mature phases (early-upper mature) of kerogen and it has its own vitrinite-calibrated cut-offs, which can be correlated with both the T-max and TAI parameters. This undoubtedly allows the KMI to be easily correlated and complement other classical, expensive maturity indices. This opens the door widely for the palynologists and organic petrologists to use the KMI with good confidence and high reliability for its proven good maturity appraisal. |
英文关键词 | RGB coloration RGB-based maturity index Classical thermal maturity indices Kerogen maturation index KMI Sporomorphs North Western Desert of Egypt |
类型 | Article ; Proceedings Paper |
语种 | 英语 |
国家 | Egypt ; USA |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000431159700006 |
WOS关键词 | NORTHERN WESTERN DESERT ; TUNIS 1X BOREHOLE ; VITRINITE REFLECTANCE ; HYDROCARBON EXPLORATION ; EGYPT ; BASIN ; SUPPRESSION ; PYROLYSIS ; PETROLOGY |
WOS类目 | Energy & Fuels ; Geosciences, Multidisciplinary |
WOS研究方向 | Energy & Fuels ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/210174 |
作者单位 | 1.Cairo Univ, Fac Sci, Dept Geol, Giza 12613, Egypt; 2.Assiut Univ, Fac Sci, Dept Geol, Assiut 71516, Egypt; 3.Core Labs LP, 6316 Windfern Rd, Houston, TX 77040 USA |
推荐引用方式 GB/T 7714 | Tahoun, Sameh S.,Deaf, Amr S.,Gentzis, Thomas,et al. Modified RGB-based kerogen maturation index (KMI): Correlation and calibration with classical thermal maturity indices[J],2018,190:70-83. |
APA | Tahoun, Sameh S.,Deaf, Amr S.,Gentzis, Thomas,&Carvajal-Ortiz, Humberto.(2018).Modified RGB-based kerogen maturation index (KMI): Correlation and calibration with classical thermal maturity indices.INTERNATIONAL JOURNAL OF COAL GEOLOGY,190,70-83. |
MLA | Tahoun, Sameh S.,et al."Modified RGB-based kerogen maturation index (KMI): Correlation and calibration with classical thermal maturity indices".INTERNATIONAL JOURNAL OF COAL GEOLOGY 190(2018):70-83. |
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