Biomarker Characterization of Various Oil Shale Grades in the Upper Cretaceous Qingshankou Formation, Southeastern Songliao Basin, Ne China

Hu, Fei; Liu, Z; Meng, Qingtao; Wang, J; Song, Qian; Xie, Wenzhao

doi:10.3176/oil.2018.4.02

Cited by 5 publications

(3 citation statements)

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“…The model set up in the paper is based on the field pilot of DBHT in the Songliao Basin. The Songliao Basin hosts a remarkably high number of oil shale layers, − but their oil shale is lean (low oil yield and high ash) and deeply buried, making it a vital testing site for oil shale in situ exploitation. The oil shale explored in the field pilot of DBHT is the Qingshankou Formation, with a burial depth above 300 m, an average oil yield of 5.3%, and an oil shale layer thickness of 4–4.5 m. The upper and lower oil shale layers are mudstone layers, an excellent natural water barrier.…”

Section: Model Description and Parametersmentioning

confidence: 99%

Three-Dimensional Numerical Simulation of Hydrocarbon Production and Reservoir Deformation of Oil Shale In Situ Conversion Processing Using a Downhole Burner

et al. 2022

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A three-dimensional numerical simulation of oil shale in situ conversion processing by applying the downhole burner heating technology was conducted. The evolution of the fluid vector and temperature field and the characteristic of kerogen decomposition and oil and gas production were analyzed. The effects of different burning temperatures and gas injection velocities on the thermal evolution processing of oil shale in situ conversion were investigated. The stress–strain and deformation of the oil shale stratum during in situ processing were studied. The results show that kerogen decomposition is a thermo-kinetically controlled mechanism. Both the gas injection velocity and burning temperature can enhance the kerogen decomposition and oil production, especially for the latter one. In addition, the stratum–deformation of oil shale should be considered for oil shale in situ conversion processing, especially for the long-term operational lifetime.

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Section: Model Description and Parametersmentioning

confidence: 99%

Three-Dimensional Numerical Simulation of Hydrocarbon Production and Reservoir Deformation of Oil Shale In Situ Conversion Processing Using a Downhole Burner

et al. 2022

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“…Within the basin, the Qingshankou Formation contains 65.94 billion tons of oil shale resources due to the development of several oil shale layers . The oil shales in the first member of the Qingshankou Formation (K 2 qn 1 ) have attracted extensive attention. − The results indicated that high primary productivity dominated by lamellar algae and structural algae is conducive to the enrichment of organic matter, , a stratified water column with high salinity and an anoxic bottom water condition is beneficial to the preservation of organic matter, , and a warm and humid paleoclimate and a suitable sediment supply rate also provided conditions for the formation of oil shales. ,, However, there are several oil shale layers with different qualities in the K 2 qn, 1 and the minerogenetic condition differences among the oil shales have rarely been studied. Additionally, the parent rock and tectonic setting of the source area of the K 2 qn 1 oil shales have hardly been studied.…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and Element Geochemistry of Oil Shales in the Lower Cretaceous Qingshankou Formation of the Southern Songliao Basin, Northeast China: Implications of Provenance, Tectonic Setting, and Paleoenvironment

Meng

Liu

2021

ACS Earth Space Chem.

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Songliao Basin is a large Mesozoic oil shale-bearing basin in the northeast of China, where multiple layers of oil shales and mudstones developed in the first member of the Qingshankou Formation (K 2 qn 1 ). Mineralogy and geochemical data were used to reveal the provenance and tectonic setting of the sediments; furthermore, the differences in the paleoenvironment between mudstones and oil shales as well as between different oil shale layers were revealed. Core observation shows that oil shales are light brown with horizontal bedding, while mudstones are dark gray with a massive structure. X-ray diffraction data revealed abundant clay minerals and a certain amount of syngenetic pyrite in the oil shales, indicating that oil shale forms in a reducing water environment. The element ratios revealed that the parent rocks were mostly felsic volcanic rocks, and the discriminant diagrams indicated that the tectonic setting was of a continental island arc. The paleoenvironment and the genetic mechanism of oil shales are revealed by geochemical data, and the oil shales and mudstones were deposited under warmhumid paleoclimate, salty brackish, and strong reducing water environments. The geochemical curves show four high and low change cycles in the column, which means that the oil shale layers have a higher organic matter content than the mudstone layers because of the higher primary productivity, more saline water environments, and stronger reducing conditions. From the lower layer 1 to the upper layer 4 of oil shales, the extent of the warm-humid climate gradually weakened, whereas the salinity of the water environment gradually increased.

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“…However, oil shale has not been regarded as an effective source rock in petroliferous basins in traditional hydrocarbon evaluation. Further research has shown that many large petroliferous basins in China are related to oil shales, for instance, the Jiyang Depression in the Bohai Bay Basin (Y. Wang, Li, Gong, Zhu, & Hao, 2013; Zhang et al, 2003), the Songliao Basin (Feng et al, 2011; F. Hu et al, 2018), the Shanxi‐Gansu‐Ningxia Basin (P. Fan, Shen, Rong, Wang, & Ye, 1980; L. Wang, Wang, Li, Zhu, & Wei, 2010; W. Wang, Yin, & Li, 2010), the Qiangtang Basin (Ji, Xia, Yi, & Wu, 2018; G. Xia, Ji, Chen, & Yi, 2017; Yi et al, 2013), and the Sichuan Basin (R. Fan et al, 2014; Tuo, Wu, & Zhang, 2016; Xu, Yuan, Ma, Liu, & Cai, 2007). Therefore, oil shale is not only a directly available unconventional energy source, but it is also of great theoretical and practical significance to the assessment of the petroleum resource potential of a basin.…”

Section: Introductionmentioning

confidence: 99%

The organic geochemical characteristics from the Palaeogene lacustrine source rock in the Nyima Basin, Central Tibet, and their geological significance

et al. 2021

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The Lunpola Basin is a fault‐depression type residual Palaeogene continental basin, and it is the only basin located in Tibet in which industrial oil has been discovered. In recent years, as research has progressed, quantities of oil shale and asphalt were discovered in the adjacent Nyima Basin, which shows a good prospect for exploration. In this study, the organic geochemistry, n‐alkanes, biomarkers, and maturity parameters of the samples were analysed using gas chromatography (GC) and mass spectrometry (MS). The organic geochemistry revealed that the Niubao Formation has a high organic matter abundance (total organic carbon content of 0.15–8.43 wt% and hydrogen index of 31.25–1721.15) and is dominated by type I–II2 kerogen. The GC and MS analyses indicate that the oil shales of the Nyima Basin have a high organic matter abundance and a good hydrocarbon production potential, and the main organic matter sources were aquatic algae and terrestrial plants, as evidenced from the unimodal/bimodal distributions of the n‐alkanes. Besides, the high phytoalkane, gammacerane, homohopane, and gypsiferous mudstone contents in the Nyima Basin indicate a deep, hypoxic, well‐stratified, saline lacustrine sedimentary environment. Under warm climatic conditions, accelerated continental weathering increased nutrient input, leading to water‐mass eutrophication and algal blooms in the water column, while arid conditions and intensified evaporation induced saline stratification, leading to enhanced preservation of organic matter and the formation of high‐quality source rock layers in this lake basin. Therefore, the Eocene global greenhouse effect may have been the main reason for the formation of the large sets of oil shales in the Nyima Basin.

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Biomarker Characterization of Various Oil Shale Grades in the Upper Cretaceous Qingshankou Formation, Southeastern Songliao Basin, Ne China

Cited by 5 publications

References 0 publications

Three-Dimensional Numerical Simulation of Hydrocarbon Production and Reservoir Deformation of Oil Shale In Situ Conversion Processing Using a Downhole Burner

Three-Dimensional Numerical Simulation of Hydrocarbon Production and Reservoir Deformation of Oil Shale In Situ Conversion Processing Using a Downhole Burner

Mineralogy and Element Geochemistry of Oil Shales in the Lower Cretaceous Qingshankou Formation of the Southern Songliao Basin, Northeast China: Implications of Provenance, Tectonic Setting, and Paleoenvironment

The organic geochemical characteristics from the Palaeogene lacustrine source rock in the Nyima Basin, Central Tibet, and their geological significance

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