Occurrence Characteristics of Saline-Lacustrine Shale-Oil in the Qianjiang Depression, Jianghan Basin, Central China

Zhong-liang, Sun; He, Zhiliang; Wang, Furong; Han, Yuanjia; He, Sheng; Hou, Yuguang; Luo, Jing; Zheng, Youheng; Wu, Shiqiang

doi:10.1007/s12583-020-1110-7

Cited by 13 publications

(4 citation statements)

References 47 publications

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“…The adsorption isotherms were conducted with high-purity nitrogen (>99.99%) at a temperature of 77.3 K using the Quantachrome Autosorb iQ3 pore structure analyzer from Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan. Pore structure parameters were evaluated using the Barrett–Joyner–Halenda model. – …”

Section: Samples and Experimentsmentioning

confidence: 99%

Kinetic and Thermodynamic Characteristics of Supercritical Methane Adsorption on Organic-Rich Shale: A Case Study of Ordovician Wufeng and Silurian Longmaxi Gas Shale

Wang,

Yang,

Chen

et al. 2023

Energy Fuels

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Section: Samples and Experimentsmentioning

confidence: 99%

Kinetic and Thermodynamic Characteristics of Supercritical Methane Adsorption on Organic-Rich Shale: A Case Study of Ordovician Wufeng and Silurian Longmaxi Gas Shale

Wang,

Yang,

Chen

et al. 2023

Energy Fuels

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“…Their findings suggest that the content of organic matter and quartz is the main reason for the complexity of the pore structure. Sun et al (2021) used low-temperature nitrogen adsorption and highpressure mercury injection experiments to compare and analyze the complexity of shale pores in Qianjiang Sag and pointed out that the existence of oil film would reduce the complexity of pores, while the development of salt minerals would reduce the connectivity of pores. Xie et al (2022) pointed out in their study of multi-scale fractal characteristics of shale pores using different gas adsorption experiments and high-pressure mercury intrusion experiments that different experimental methods have specific pore size adaptation ranges in characterizing pore complexity.…”

Section: Introductionmentioning

confidence: 99%

Pore heterogeneity analysis and control mechanisms in Cambrian shale of the Shuijingtuo Formation, Yichang area, China

An,

Zhao,

Zhang

2024

Front. Earth Sci.

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This study focuses on understanding the fractal characteristics and controlling factors of micropore structures within organic-rich shale of the Cambrian Shuijingtuo Formation in the Yichang area of Hubei Province. Mineralogy, petrology, and organogeochemical characteristics were confirmed through comprehensive testing methods, including whole-rock X-ray diffraction and organic geochemical analyses. Additional experiments included low-temperature carbon dioxide adsorption, low-temperature nitrogen adsorption, and high-pressure mercury injection. Fractal dimensions of micropores, mesopores, and macropores were calculated using the V-S, FHH, and MENGER sponge models, respectively. Results indicate that the Cambrian Shuijingtuo Formation represents a typical deposit from an alkaline water body, resulting in high-calcareous shale. Fractal dimensions were as follows: micropores (D1) ranged from 2.1138 to 2.3475 (average 2.2342), mesopores (D2) ranged from 2.5327 to 2.7162 (average 2.6171), and macropores (D3) ranged from 2.7361 to 2.9316 (average 2.82905). Correlations were observed between total organic carbon (TOC) content and Ro with D1 and D2 (positive) and D3 (negative). Shale pore volume and specific surface area exhibited positive correlations with D1 and D2 but negative correlations with D3. High bio-deposited silica positively influenced micropore and mesopore development, while clay mineral compaction and dehydration transformations favored macropore development. Carbonate minerals primarily contributed to regular macropores, with complex correlations involving fractal dimensions D1, D2, and D3. The research results provide theoretical support for analyzing pore fractal characteristics of shallow old Marine shale reservoirs and the prediction and development plan of high-quality reservoirs of the Shuijingtuo Formation in the Yichang area.

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“…Continental shale is often characterized by frequent changes in the sedimentary environment in the vertical direction and deposits of various shale lithofacies, resulting in complex pore systems and strong heterogeneity in shale reservoirs. − Pore structural characteristics, including pore morphology, pore volume (PV), specific surface area (SSA), and pore size distribution (PSD), are important factors affecting the occurrence of shale oil, fluid migration, and shale reservoir evaluation. − In recent years, various qualitative and quantitative technological methods have been used to elucidate the pore structure characteristics of shale. Qualitative methods, such as field emission scanning electron microscopy (FE-SEM), transmission electron microscopy, and computed tomography, have been widely used to observe the morphology and connectivity characteristics of micro–nanopore networks. − Quantitative methods, including N 2 /CO 2 physisorption, high-pressure mercury intrusion (HPMI), small-angle/ultra-small-angle neutron scattering, and nuclear magnetic resonance (NMR), are often applied to determine the PSD, SSA, PV, and porosity. − Different methods have different applications and limitations, and a combination of different methods is effective for characterizing the full-scale pore systems of shale …”

Section: Introductionmentioning

confidence: 99%

Full-Scale Pore Structure and Fractal Characteristics of Continental Organic-Rich Shale: A Case Study of the Dongyuemiao Member of Jurassic Ziliujing Formation in the Fuxing Area, Eastern Sichuan Basin

Huang

Yang

et al. 2023

Energy Fuels

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Strong heterogeneity and complexity of continental shales lead to significant differences in pore microstructure and fractal characteristics. In this study, the pore structure and fractal characteristics within a full-scale spectrum of continental shale from the Dongyuemiao (DYM) Member are systemically investigated using field emission scanning electron microscopy (FE-SEM), gas adsorption, and high-pressure mercury intrusion. Additionally, factors affecting the pore structure and fractal characteristics of Jurassic continental shale are discussed. The results show that, owing to the influence of mineral composition and total organic carbon (TOC) content, the pore structure characteristics of different shale lithofacies vary significantly. Argillaceous and mixed shales mainly develop interparticle pores, interlayer pores, or microfractures, and the pore volume (PV) is dominated by mesopores. Calcareous shale mostly develops dissolved macropores. The mixed shales have more complicated pore structures and stronger pore heterogeneity, as indicated by their larger fractal dimension (D) values. Significant positive correlations occur between the quartz content and PV, special surface area, and D value, while carbonate minerals show an opposite correlation trend. Positive relationships exist between the clay minerals and the PV of micropores, whereas negative correlations exist between the average pore size with quartz, clay minerals, and D values. Shales with higher quartz and clay content have larger specific surface area (SSA), PV and smaller pore sizes, resulting in more complex pore structures and stronger heterogeneity. Additionally, the TOC content is negatively associated with the total PV, D1, and D2, which is related to the limited organic matter (OM) pores developed in the DYM shale. Moreover, the presence of extracted OM reduces the roughness and complexity of micropores. The research results are helpful to better understand the formation and evaluation of the complex pore system of Jurassic continental shale in the Sichuan Basin, and can effectively guide the development of continental shale oil and gas resources in China.

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Occurrence Characteristics of Saline-Lacustrine Shale-Oil in the Qianjiang Depression, Jianghan Basin, Central China

Cited by 13 publications

References 47 publications

Kinetic and Thermodynamic Characteristics of Supercritical Methane Adsorption on Organic-Rich Shale: A Case Study of Ordovician Wufeng and Silurian Longmaxi Gas Shale

Kinetic and Thermodynamic Characteristics of Supercritical Methane Adsorption on Organic-Rich Shale: A Case Study of Ordovician Wufeng and Silurian Longmaxi Gas Shale

Pore heterogeneity analysis and control mechanisms in Cambrian shale of the Shuijingtuo Formation, Yichang area, China

Full-Scale Pore Structure and Fractal Characteristics of Continental Organic-Rich Shale: A Case Study of the Dongyuemiao Member of Jurassic Ziliujing Formation in the Fuxing Area, Eastern Sichuan Basin

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