Mixed oils derived from multiple source rocks in the Cainan oilfield, Junggar Basin, Northwest China. Part II: artificial mixing experiments on typical crude oils and quantitative oil-source correlation

2003 ◽  
Vol 34 (7) ◽  
pp. 911-930 ◽  
Author(s):  
Jianping Chen ◽  
Chunping Deng ◽  
Digang Liang ◽  
Xulong Wang ◽  
Ningning Zhong ◽  
...  
Keyword(s):  
Junggar Basin ◽  
Northwest China ◽  
Multiple Source ◽  
Source Rocks ◽  
Crude Oils ◽  
Artificial Mixing ◽  
Source Correlation ◽  
Oil Source

scholarly journals Deep-Buried Triassic Oil-Source Correlation in the Central Junggar Basin, NW China

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-17 ◽  
Author(s):  
Ming Wu ◽  
Jun Jin ◽  
Wanyun Ma ◽  
Baoli Xiang ◽  
Ni Zhou ◽  
...  
Keyword(s):  
Higher Plants ◽  
Linear Regression Analysis ◽  
Stable Carbon Isotope ◽  
Junggar Basin ◽  
Type A ◽  
Source Rocks ◽  
Central Basin ◽  
Nw China ◽  
Source Correlation ◽  
Oil Source

Whether there is an effective deep-buried lacustrine Triassic petroleum system in the Junggar Basin, NW China, has been enigmatic and debated for a long time. Here we conduct an oil-source correlation to address this issue. Results show that the extracted bitumens from the Triassic mudstones in the central basin have distinctive stable carbon isotope and biomarker compositions compared to the Permian-sourced and Jurassic-sourced hydrocarbons, the other two recognized sources in the study area. These characteristics include δ13C value of -30.46~-26.30‰, β-carotane/maximum n-alkane of 0.22–0.41, Pr/Ph of 1.00–1.51, C24 tetracyclic terpane/C26 tricyclic terpane of 0.43–0.96, Ts/Tm of 0.34–0.64, gammacerane/C30 hopane of 0.10–0.14, and regular steranes C27 > C28 < C29 with C29 sterane in dominance (40–50%). These suggest that the Triassic mudstones in the study area host fresh lacustrine organic matters with high input of higher plants. The Triassic-reservoired crude oils and extracts can be divided into two types. Through oil-source correlation, we infer that both type A and type B oils are derived from mixed Permian and Triassic source rocks. Linear regression analysis shows that the contribution from Triassic mudstones to type A and B oils is 67% and 31%, respectively. This implies that the deep-buried Triassic lacustrine mudstones in the Junggar Basin may have some oil-generation potential and thus might represent a new case of Triassic petroleum systems in China and deserves a more detailed and thorough study in future exploration and exploitation.

The Jurassic oil-source correlation of Dishuiquan Oilfield in Junggar basin, Northwest China

2019 ◽  
Vol 38 (4) ◽  
pp. 354-360 ◽  
Author(s):  
Shuai Li ◽  
Shijia Chen ◽  
Jun Jin ◽  
Tingyan Li ◽  
Yingying Chen ◽  
...  
Keyword(s):  
Junggar Basin ◽  
Northwest China ◽  
Source Correlation ◽  
Oil Source

scholarly journals Effective source rock selection and oil–source correlation in the Western Slope of the northern Songliao Basin, China

2021 ◽  
Vol 18 (2) ◽  
pp. 398-415
Author(s):  
He Bi ◽  
Peng Li ◽  
Yun Jiang ◽  
Jing-Jing Fan ◽  
Xiao-Yue Chen
Keyword(s):  
Organic Matter ◽  
Source Rock ◽  
Thermal Evolution ◽  
Songliao Basin ◽  
Source Rocks ◽  
Crude Oils ◽  
Western Slope ◽  
Geochemical Parameters ◽  
Group I ◽  
Oil Source

AbstractThis study considers the Upper Cretaceous Qingshankou Formation, Yaojia Formation, and the first member of the Nenjiang Formation in the Western Slope of the northern Songliao Basin. Dark mudstone with high abundances of organic matter of Gulong and Qijia sags are considered to be significant source rocks in the study area. To evaluate their development characteristics, differences and effectiveness, geochemical parameters are analyzed. One-dimensional basin modeling and hydrocarbon evolution are also applied to discuss the effectiveness of source rocks. Through the biomarker characteristics, the source–source, oil–oil, and oil–source correlations are assessed and the sources of crude oils in different rock units are determined. Based on the results, Gulong and Qijia source rocks have different organic matter primarily detrived from mixed sources and plankton, respectively. Gulong source rock has higher thermal evolution degree than Qijia source rock. The biomarker parameters of the source rocks are compared with 31 crude oil samples. The studied crude oils can be divided into two groups. The oil–source correlations show that group I oils from Qing II–III, Yao I, and Yao II–III members were probably derived from Gulong source rock and that only group II oils from Nen I member were derived from Qijia source rock.

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