Sedimentology and lithofacies of lacustrine shale: A case study from the Dongpu sag, Bohai Bay Basin, Eastern China

Huang, Chunyan; Zhang, Jinchuan; Wang, Hua; Yue, Jiaheng; Lu, Yongchao

doi:10.1016/j.jngse.2018.10.014

Cited by 19 publications

(4 citation statements)

References 24 publications

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“…The lithology of each section from north to south varies greatly. , According to its lithology and fossil combination, the Shahejie Formation is divided into four sections. The fourth member of the Shahejie Formation is divided into two subsections.…”

Section: Geological Settingmentioning

confidence: 99%

“…The Paleogene is composed of the Shahejie Formation and the Dongying Formation, with a thickness of about 6000 m. The Shahejie Formation (Es) is the main target stratum of the oil and source rock, and the overall thickness of the Shahejie Formation is about 5000 m. 24,25 The lithology of each section from north to south varies greatly. 26,27 According to its lithology and fossil combination, the Shahejie Formation is divided into four sections. The fourth member of the Shahejie Formation is divided into two subsections.…”

Section: Geological Settingmentioning

confidence: 99%

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Molecular Characterization of NSO Compounds and Paleoenvironment Implication for Saline Lacustrine Oil Sands by Positive-Ion Mass Spectrometry Coupled with Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry

Zhang

et al. 2021

ACS Omega

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NSO compounds mainly exist in geological bodies in the form of nonhydrocarbons and asphaltenes with abundant geological and geochemical information. Combined with the gas chromatography mass spectrometry (GC−MS) technology, positive-ion electrospray ionization Fourier-transform ion cyclotron resonance MS (FT-ICR MS) was used to understand the composition and distribution characteristics of NSO compounds in the oil sands of the Dongpu Depression and to explore their paleoenvironmental significance. The results show that n-alkanes are characterized by an even carbon number and phytane dominance, suggesting a saline lacustrine environment. Certain abundance of nC 37 and β-carotane, high gammacerane content, and low diasterane content are detected in the analyzed samples, reflecting the saline-reducing paleoenvironment for the organic matter.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Molecular Characterization of NSO Compounds and Paleoenvironment Implication for Saline Lacustrine Oil Sands by Positive-Ion Mass Spectrometry Coupled with Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry

Zhang

et al. 2021

ACS Omega

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“…For example, the Hetaoyuan Formation mudstone of Paleogene in the Biyang Depression (Chen et al, 2011), the Mesozoic Haynesville Shale from the Louisiana Basin (Ross et al, 2009), etc. However, due to the small size, complex sources of components (Cao et al, 2015;Yang et al, 2017;Wu et al, 2019), large variation of rock composition (Yan et al, 2018;Zhao et al, 2018;Su et al, 2019;Zou et al, 2019) and strong heterogeneity (Yuan et al, 2015;Pu et al, 2016;Huang et al, 2018; of fine-grained sedimentary rocks, there is still a lack of systematic and scientific criteria for the petrological classification of them (Jiang et al, 2013;Zhu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Lithofacies and Pore Structure of Fine‐grained Sedimentary Rocks of Qing‐1 Member of Cretaceous in the Southern Songliao Basin

Lin

Liu

et al. 2021

Acta Geologica Sinica (Eng)

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Fine-grained sedimentary rocks often contain hydrocarbon and mineral resources. Compared with coarse-grained sedimentary rocks, fine-grained sedimentary rocks are less studied. To elucidate the lithofacies and pore structure of lacustrine fine-grained rocks, the 340.6 m continuous core of Cretaceous Qing-1 Member from five wells in the southern central depression of the Songliao Basin was analyzed using X-ray diffraction, Rock-Eval pyrolysis, low-temperature nitrogen adsorption, high-pressure mercury injection, argon ion polishing-field emission scanning electron microscopy, and laser scanning confocal microscopy. Based on mineral compositions, organic matter abundance and sedimentary structure, lacustrine fine-grained rocks in the study area were divided into ten lithofacies, with their spatial distributions mainly influenced by tectonic cycle, climate cycle and provenance. Furthermore, pore structure characteristics of different lithofacies are summarized. (1) The siliceous mudstone lithofacies with low TOC content and the laminated/layered claybearing siliceous mudstone lithofacies with medium TOC content have the highest proportion of first-class pores (diameter > 100 nm), making it the most favourable lithofacies for the accumulation of shale oil and shale gas. (2) The massive claybearing siliceous mudstone lithofacies with low TOC content has the highest proportion of second-class pores (diameter ranges from 10 to 100 nm), making it a favourable lithofacies for the enrichment of shale gas. (3) The massive clay-bearing siliceous mudstone lithofacies with high TOC content has the highest proportion of third-class pores (diameter < 10 nm), making it intermediate in gas storage and flow. Laser confocal oil analysis shows that the heavy component of oil is mainly distributed in the clay lamina, while the light part with higher mobility is mainly concentrated in the silty lamina.

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“…The Bohai Bay Basin is located on the east coast of China, with a total area of 200,000 km 2 (Figure 1A) (Chang, 1991;Huang et al, 2018). The Cangdong Sag is a secondary structural unit in the southern area of the Huanghua Depression in the Bohai Bay Basin, with an exploration area of about 1760 km 2 (Figure 1B).…”

Section: Geological Backgroundmentioning

confidence: 99%

Table1.XLSX

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Sedimentology and lithofacies of lacustrine shale: A case study from the Dongpu sag, Bohai Bay Basin, Eastern China

Cited by 19 publications

References 24 publications

Molecular Characterization of NSO Compounds and Paleoenvironment Implication for Saline Lacustrine Oil Sands by Positive-Ion Mass Spectrometry Coupled with Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry

Molecular Characterization of NSO Compounds and Paleoenvironment Implication for Saline Lacustrine Oil Sands by Positive-Ion Mass Spectrometry Coupled with Fourier-Transform Ion Cyclotron Resonance Mass Spectrometry

Lithofacies and Pore Structure of Fine‐grained Sedimentary Rocks of Qing‐1 Member of Cretaceous in the Southern Songliao Basin

Table1.XLSX

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