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Haitao Xue - One of the best experts on this subject based on the ideXlab platform.
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Porosity Enhancement Potential through Dolomite Mineral Dissolution in the Shale Reservoir: A Case Study of an Argillaceous Dolomite Reservoir in the Jianghan Basin
Energy & Fuels, 2019Co-Authors: Yufeng Kuang, Zehu Cheng, Haitao Xue, Lei ShiAbstract:Shale oil has been found in the argillaceous Dolomite reservoir of the Paleogene Xingouzui Formation in the Jianghan Basin. However, the shale oil storage mechanism in these rocks remains unclear, considering that increasing attention has been paid to shales instead of argillaceous Dolomites. This article illustrated the microscopic pore structure and distribution of the argillaceous Dolomite reservoir, discussed the porosity enhancement potential through Dolomite Mineral dissolution by organic acids, and indicated the contribution of the Dolomite Mineral dissolution pores to the porosity. Scanning electronic microscopy images show that the argillaceous Dolomite reservoirs mainly contain inorganic pores, including intercrystalline pores, intergranular pores, and dissolution pores. However, organic pores are observed to be sporadically distributed. Nano-computed tomography data show that the pores of argillaceous Dolomite vary in morphology and size and are unevenly spatially distributed. There are some is...
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Quantitative characterization on shale-hosted oil reservoir: A case study of argillaceous Dolomite reservoir in the Jianghan Basin
Fuel, 2017Co-Authors: Weiming Wang, Haitao XueAbstract:Abstract This article quantitatively investigated the microscopic pore structure of the Eocene argillaceous Dolomite reservoir from the Jianghan Basin in China to further the understanding of shale oil and gas storage mechanism in these rocks, considering that extensive studies have been conducted on the shale reservoir but seldom focused on argillaceous Dolomite reservoir. Image analysis technology (containing Areal porosity method, CT reconstruction calibration method and focused ion beam-scanning electron microscope) and intrusive method including mercury intrusion porosimetry were used to discuss the size, spatial distribution and connectivity of the pores, as well as to reveal the contribution rate of the pores to porosity. Dolomite and clay Minerals are the main Minerals in the samples (including mudstones, argillaceous Dolomite and Dolomite mudstones), with the average values are 27.8% and 28.5% respectively. Inorganic pores (Mineral-associated pores) rather than organic pores (organic matter-hosted pores) are dominant in the argillaceous Dolomite reservoir, which contain intercrystalline pores, intergranular pores and dissolved pores. The inorganic porosities calibrated by SEM range from 7.82% to 18.58%, close to the measured porosities. The argillaceous Dolomites mainly develop intercrystalline pores in the Dolomite Mineral with good connectivity, while mudstones or Dolomite mudstones mainly contain intergranular pores in the clay Minerals with poor connectivity. Large throats always distribute in the parts where pores are well developed and connected. The connectivity of the pores in the argillaceous Dolomite improves with the increase of the Dolomite Mineral content. The argillaceous Dolomites have relatively high porosity containing more macropores while mudstones have lower porosity occupied by much more micropores. Pores with relatively larger throat radii contribute a larger fraction of the porosity of the argillaceous Dolomite, while pores with smaller throat radii mainly contribute to porosity in the mudstones. These characteristics may be beneficial for understanding reservoir mechanism of argillaceous Dolomite reservoir.
Lei Shi - One of the best experts on this subject based on the ideXlab platform.
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Porosity Enhancement Potential through Dolomite Mineral Dissolution in the Shale Reservoir: A Case Study of an Argillaceous Dolomite Reservoir in the Jianghan Basin
Energy & Fuels, 2019Co-Authors: Yufeng Kuang, Zehu Cheng, Haitao Xue, Lei ShiAbstract:Shale oil has been found in the argillaceous Dolomite reservoir of the Paleogene Xingouzui Formation in the Jianghan Basin. However, the shale oil storage mechanism in these rocks remains unclear, considering that increasing attention has been paid to shales instead of argillaceous Dolomites. This article illustrated the microscopic pore structure and distribution of the argillaceous Dolomite reservoir, discussed the porosity enhancement potential through Dolomite Mineral dissolution by organic acids, and indicated the contribution of the Dolomite Mineral dissolution pores to the porosity. Scanning electronic microscopy images show that the argillaceous Dolomite reservoirs mainly contain inorganic pores, including intercrystalline pores, intergranular pores, and dissolution pores. However, organic pores are observed to be sporadically distributed. Nano-computed tomography data show that the pores of argillaceous Dolomite vary in morphology and size and are unevenly spatially distributed. There are some is...
G. Anbalagan - One of the best experts on this subject based on the ideXlab platform.
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Spectroscopic study of phase transitions in Dolomite Mineral
Journal of Raman Spectroscopy, 2007Co-Authors: Sethu Gunasekaran, G. AnbalaganAbstract:The process and the formation of new Minerals upon heating carbonate rocks containing clay Minerals together with Dolomite are determined by thermal analysis, X-ray diffraction (XRD), infrared and Raman spectroscopy. The Dolomite–calcite–calcium oxide phase transition sequences were followed up to 947 °C in a naturally occurring Dolomite sample. The spectral variations of the internal modes of the carbonate trigonal (ν1, ν2, ν3 and ν4) were used to probe the structural phase transitions. A new Raman mode emerged at 1090 cm−1 in the ν1 mode region, and infrared modes emerged at 713, 874, and 1420 cm−1 in the ν4, ν2 and ν3 regions at 750 °C, indicating the onset of the Dolomite phase. The calcium oxide phase, (which on reaction with atmospheric water forms portlandite) with an onset temperature of around 950 °C, was also characterized by the appearance of the infrared mode around 450 cm−1. The Minerals, which were formed upon heating the Dolomite, were calcite, calcium oxide and diopside. Copyright © 2007 John Wiley & Sons, Ltd.
Yufeng Kuang - One of the best experts on this subject based on the ideXlab platform.
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Porosity Enhancement Potential through Dolomite Mineral Dissolution in the Shale Reservoir: A Case Study of an Argillaceous Dolomite Reservoir in the Jianghan Basin
Energy & Fuels, 2019Co-Authors: Yufeng Kuang, Zehu Cheng, Haitao Xue, Lei ShiAbstract:Shale oil has been found in the argillaceous Dolomite reservoir of the Paleogene Xingouzui Formation in the Jianghan Basin. However, the shale oil storage mechanism in these rocks remains unclear, considering that increasing attention has been paid to shales instead of argillaceous Dolomites. This article illustrated the microscopic pore structure and distribution of the argillaceous Dolomite reservoir, discussed the porosity enhancement potential through Dolomite Mineral dissolution by organic acids, and indicated the contribution of the Dolomite Mineral dissolution pores to the porosity. Scanning electronic microscopy images show that the argillaceous Dolomite reservoirs mainly contain inorganic pores, including intercrystalline pores, intergranular pores, and dissolution pores. However, organic pores are observed to be sporadically distributed. Nano-computed tomography data show that the pores of argillaceous Dolomite vary in morphology and size and are unevenly spatially distributed. There are some is...
Sethu Gunasekaran - One of the best experts on this subject based on the ideXlab platform.
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Spectroscopic study of phase transitions in Dolomite Mineral
Journal of Raman Spectroscopy, 2007Co-Authors: Sethu Gunasekaran, G. AnbalaganAbstract:The process and the formation of new Minerals upon heating carbonate rocks containing clay Minerals together with Dolomite are determined by thermal analysis, X-ray diffraction (XRD), infrared and Raman spectroscopy. The Dolomite–calcite–calcium oxide phase transition sequences were followed up to 947 °C in a naturally occurring Dolomite sample. The spectral variations of the internal modes of the carbonate trigonal (ν1, ν2, ν3 and ν4) were used to probe the structural phase transitions. A new Raman mode emerged at 1090 cm−1 in the ν1 mode region, and infrared modes emerged at 713, 874, and 1420 cm−1 in the ν4, ν2 and ν3 regions at 750 °C, indicating the onset of the Dolomite phase. The calcium oxide phase, (which on reaction with atmospheric water forms portlandite) with an onset temperature of around 950 °C, was also characterized by the appearance of the infrared mode around 450 cm−1. The Minerals, which were formed upon heating the Dolomite, were calcite, calcium oxide and diopside. Copyright © 2007 John Wiley & Sons, Ltd.