Semi-closed artificial thermal maturation of type I source rock with the presence of natural formation water: Hydrocarbon generation and individual n-alkane stable carbon isotope partitioning pattern

2022 ◽  
pp. 105535
Author(s):  
Shaojie Li ◽  
Xiaowen Guo ◽  
LunJu Zheng
Keyword(s):  
Carbon Isotope ◽  
Source Rock ◽  
Stable Carbon Isotope ◽  
Type I ◽  
Hydrocarbon Generation ◽  
Formation Water ◽  
Stable Carbon ◽  
Natural Formation ◽  
Isotope Partitioning ◽  
Partitioning Pattern

scholarly journals Petroleum Geochemistry Regional Study of Murzuq Basin: Insights from Biomarkers Characteristic, Stable Carbon Isotope and Environmental Characterization

2020 ◽  
Vol 4 (1) ◽  
pp. 1-14
Author(s):  
Aboglila S
Keyword(s):  
Carbon Isotope ◽  
Vitrinite Reflectance ◽  
Stable Carbon Isotope ◽  
Source Rocks ◽  
Crude Oils ◽  
Type I ◽  
Stable Carbon ◽  
Potential Source ◽  
Geochemical Parameters ◽  
Rock Eval

This search aims to apply developed geochemical methods to a number of oils and source rock extracts to better establish the features of ancient environments that occurred in the Murzuq basin. Geochemical and geophysical approaches were used to confirm further a source contribution from other Paleozoic formations to hydrocarbon accumulations in the basin. One hundred and forty rock units were collected from B1-NC151, D1-NC174, A1-NC 76, D1-NC 151, F1-NC58, A1-NC 186, P1-NC 101, D1-NC 58, H1-NC58 and A1-NC58 wells. Seven crude oils were collocated A1-NC186, B1-NC186, E2-NC101, F3-NC174, A10-NC115, B10-NC115 and H10-NC115 wells. A geochemical assessment of the studied rocks and oils was done by means of geochemical parameters of total organic carbon (TOC), Rock-Eval analysis, detailed-various biomarkers and stable carbon isotope. The TOC values from B1-NC151 range 0.40% to 8.5%, A1-NC186 0.3% and 1.45, A1-NC76 0.39% to 0.74%, D1-NC151 0.40% to 2.00% to F1-NC58 0.40% to 1.12%. D1_NC174 0.30% to 10 %, P1-NC101 0.80% to 1.35%, D1-NC58 0.5% to 1.10%, H1-NC58 0.20% to 3.50%, A1-NC58 0.40% to 1.60%. The categories of organic matter from rock-eval pyrolysis statistics point to that type II kerogen is the main type, in association with type III, and no of type I kerogen recognized. Vitrinite reflectance (%Ro), Tmax and Spore colour index (SCI) as thermal maturity parameters reflect that the measured rock units are have different maturation levels, ranging from immature to mature sources. acritarchs distribution for most samples could be recognized and Palynomorphs are uncommon. Pristane to phytane ratios (> 1) revealed marine shale to lacustrine of environmental deposition. The Stable carbon isotope ( δ 13 C) values of seven rock-extract samples are -30.98‰ and -29.14‰ of saturates and -29.86‰ to -28.37‰ aromatic fractions. The oil saturate hydrocarbon fractions range between -29.36‰ to -28.67‰ and aromatic are among -29.98 ‰ to -29.55 ‰. The δ 13 C data in both rock extractions and crude oils are closer to each other, typical in sign of Paleozoic age. It is clear that the base of Tanezzuft Formation (Hot shale) is considered the main source rocks. The Devonian Awaynat Wanin Formation as well locally holds sufficient oil prone kerogen to consider as potential source rocks. Ordovician Mamuniyat Formation shales may poorly contain oil prone kerogen to be addressed in future studies. An assessment of the correlations between the oils and potential source rocks and between the oils themselves indicated that most of the rocks extracts were broadly similar to most of the oils and supported by carbon stable isotope analysis results.

Oil–oil and oil-source rock correlations in the Alpine Foreland Basin of Austria: Insights from biomarker and stable carbon isotope studies

2011 ◽  
Vol 28 (6) ◽  
pp. 1171-1186 ◽  
Author(s):  
Reinhard Gratzer ◽  
Achim Bechtel ◽  
Reinhard F. Sachsenhofer ◽  
Hans-Gert Linzer ◽  
Doris Reischenbacher ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Source Rock ◽  
Stable Carbon Isotope ◽  
Foreland Basin ◽  
Stable Carbon ◽  
Alpine Foreland ◽  
Alpine Foreland Basin ◽  
Isotope Studies ◽  
Oil Source

Stable carbon isotope compositions and source rock geochemistry of the giant gas accumulations in the Ordos Basin, China

2005 ◽  
Vol 36 (12) ◽  
pp. 1617-1635 ◽  
Author(s):  
Jinxing Dai ◽  
Jian Li ◽  
Xia Luo ◽  
Wenzheng Zhang ◽  
Guoyi Hu ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Source Rock ◽  
Ordos Basin ◽  
Stable Carbon Isotope ◽  
Stable Carbon ◽  
The Ordos Basin
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