Correlation of Maturity Parameters Derived from Methylphenanthrenes and Methyldibenzothiophenes in the Carboniferous Source Rocks from Qaidam Basin, NW China
المؤلفون المشاركون
He, Chuan
Huang, Haiping
Wang, Qianru
Li, Zongxing
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-12-21
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الملخص EN
Twenty-one core samples from the Carboniferous Keluke Formation in the Qaidam basin, NW China, have been geochemically characterized to investigate thermal maturation influence on the evolution behaviors of aromatic hydrocarbons and the validity of commonly used maturity parameters.
The Keluke Formation was deposited in marine to continental transitional facies and dominated by type III kerogen.
Rock-Eval Tmax and vitrinite reflectance (%Ro) measurement suggested that the studied samples are highly matured at peak oil to gas condensate generation stages.
Most biomarkers lost their sensitivity to indicate maturity level due to either approaching the equilibrium point or too low concentrations, while isomer distributions in alkylnaphthalenes, alkylphenanthrenes, and alkyldibenzothiophenes still show systematic variations with increasing maturity.
The present study focused on the maturity parameters derived from methylphenanthrenes (MP) and methyldibenzothiophenes (MDBT).
The most widely used methylphenanthrene index 1 (MPI‐1=1.5×2‐MP+3‐MP/P+9‐MP+1‐MP) shows no correlation with known maturity indicators, but the methylphenanthrene ratio (MPR=2‐MP/1‐MP) and methyldibenzothiophenes ratio (MDR=4‐MDBT/1‐MDBT) increase steadily with increasing maturity levels and are proved to be valid maturity parameters.
However, empirical vitrinite reflectance estimations derived from MPR and MDR have dramatically overestimated the maturity levels.
Our quantitative data illustrated that concentrations of thermally stable isomers (3-MP, 2-MP, and 4-MDBT) increase continuously with increasing maturity while thermally unstable isomers (9-MP, 1-MP, and 1-MDBT) are almost invariable in the studied maturity range.
The invalidity of MPI-1 is caused by the involvement of phenanthrene in the maturity parameter formula possibly due to a variable degree of alkylation.
Dealkylation of methylphenanthrenes to form parent phenanthrene occurs much earlier than Ro of 1.35% reported in the literature.
The increment of MPR and MDR values with maturity levels is mainly caused by different generation rates with a higher generation rate of thermally stable isomer than thermally unstable counterpart rather than isomerization between them.
Caution should be taken when empirical formula published in literature based on commonly used maturity parameters is directly applied for maturity estimation as no universal applicable correlation is likely available.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
He, Chuan& Huang, Haiping& Wang, Qianru& Li, Zongxing. 2019. Correlation of Maturity Parameters Derived from Methylphenanthrenes and Methyldibenzothiophenes in the Carboniferous Source Rocks from Qaidam Basin, NW China. Geofluids،Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1153976
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
He, Chuan…[et al.]. Correlation of Maturity Parameters Derived from Methylphenanthrenes and Methyldibenzothiophenes in the Carboniferous Source Rocks from Qaidam Basin, NW China. Geofluids No. 2019 (2019), pp.1-12.
https://search.emarefa.net/detail/BIM-1153976
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
He, Chuan& Huang, Haiping& Wang, Qianru& Li, Zongxing. Correlation of Maturity Parameters Derived from Methylphenanthrenes and Methyldibenzothiophenes in the Carboniferous Source Rocks from Qaidam Basin, NW China. Geofluids. 2019. Vol. 2019, no. 2019, pp.1-12.
https://search.emarefa.net/detail/BIM-1153976
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1153976
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر