Hydrothermal conversion of oil shale: Synthetic oil generation and micro-scale pore structure change

Multifractal spectrums of sinter with different alkalinity were analyzed by multifractal software. The results show that sinter pore structure change from uniform to non-uniform with the improvement of alkalinity, Δα increases from 0.53 to 0.55. The structure of sinter pore is mainly microscopic by competition between macropores and micropores, Δf changes from 0.14 to-0.44. The distribution of sinter pores is quantitatively characterized by multi-fractal spectrum, which is consistent with transmission electron microscopy image.

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Evolution characteristics and model of nanopore structure and adsorption capacity in organic-rich shale during artificial thermal maturation: A pyrolysis study of the Mesoproterozoic Xiamaling marine shale with type II kerogen from Zhangjiakou, Hebei, China

Energy Exploration & Exploitation ◽

10.1177/0144598718810256 ◽

2018 ◽

Vol 37 (1) ◽

pp. 493-518 ◽

Cited By ~ 2

Author(s):

Liangwei Xu ◽

Yang Wang ◽

Luofu Liu ◽

Lei Chen ◽

Ji Chen

Keyword(s):

Pore Structure ◽

Adsorption Capacity ◽

Surface Area ◽

Pore Volume ◽

Oil Shale ◽

Hydrocarbon Generation ◽

Type Ii ◽

Thermal Maturation ◽

Evolution Characteristics ◽

Nanopore Structure

Thermal maturity has a considerable impact on hydrocarbon generation, mineral conversion, nanopore structure, and adsorption capacity evolution of shale, but that impact on organic-rich marine shales containing type II kerogen has been rarely subjected to explicit and quantitative characterization. This study aims to obtain information regarding the effects of thermal maturation on organic matter, mineral content, pore structure, and adsorption capacity evolution of marine shale. Mesoproterozoic Xiamaling immaturity marine oil shale with type II kerogen in Zhangjiakou of Hebei, China, was chosen for anhydrous pyrolysis to simulate the maturation process. With increasing simulation temperature, hydrocarbon generation and mineral transformation promote the formation, development, and evolution of pores in the shale. The original and simulated samples consist of closed microspores and one-end closed pores of the slit throat, all-opened wedge-shaped capillaries, and fractured or lamellar pores, which are related to the plate particles of clay. The increase in maturity can promote the formation and development of pores in the shale. Heating can also promote the accumulation, formation, and development of pores, leading to a large pore volume and surface area. The temperature increase can promote the development of pore volume and surface area of 1–10 and 40-nm diameter pores. The formation and development of pore volume and surface area of 1–10 nm diameter pores are more substantial than that of 40-nm diameter pores. The pore structure evolution of the sample can be divided into pore adjustment (T < 350°C, EqRo < 0.86%), development (350°C < T < 650°C, 0.86% < EqRo < 3.28%), and conversion or destruction stages (T > 650°C, EqRo > 3.28%). Along with the increase in maturity, the methane adsorption content decreases in the initial simulation stage, increases in the middle simulation stage, and reaches the maximum value at 650°C, after which it gradually decreases. A general evolution model is proposed by combining the nanopore structure and the adsorption capacity evolution characteristics of the oil shale.

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Kinetics of oil generation from oil shale from Liaoning province of China

Fuel ◽

10.1016/0016-2361(84)90216-3 ◽

1984 ◽

Vol 63 (11) ◽

pp. 1511-1514 ◽

Cited By ~ 6

Author(s):

Hyun S. Yang ◽

H.Y. Sohn

Keyword(s):

Oil Shale ◽

Liaoning Province ◽

Oil Generation ◽

Kinetics Of

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The Pyrolysis Characteristics and Pore Structure of Oil Shale of Different Densities

Energy Procedia ◽

10.1016/j.egypro.2012.02.182 ◽

2012 ◽

Vol 17 ◽

pp. 876-883 ◽

Cited By ~ 7

Author(s):

Qing Wang ◽

Ling-Wen Kong ◽

Jing-Ru Bai ◽

Zeng-Ying Gu

Keyword(s):

Pore Structure ◽

Oil Shale ◽

Pyrolysis Characteristics

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Geochemical Characteristics of Expelled and Residual Oil from Artificial Thermal Maturation of an Early Permian Tasmanite Shale, Australia

Energies ◽

10.3390/en14217218 ◽

2021 ◽

Vol 14 (21) ◽

pp. 7218

Author(s):

Xiaomin Xie ◽

Ye Wang ◽

Jingwen Lin ◽

Fenting Wu ◽

Lei Zhang ◽

...

Keyword(s):

Source Rock ◽

Oil Shale ◽

Pyrolysis Temperature ◽

Geochemical Characteristics ◽

Peak Oil ◽

Residual Oil ◽

Oil Generation ◽

Organic Matter Type ◽

Oil Source ◽

Group Compositions

Lipid biomarkers play an important role in defining oil-source rock correlations. A fundamental assumption is that composition (or ratios) of biomarkers in oil is not significantly different from that in bitumen in the source rock. In order to compare the geochemical characteristics of expelled oil and residual oil, a Permian Tasmanite oil shale was used for an artificial maturation experiment to simulate the oil generation period. The results show that the Tasmanite oil shale generated high amounts of hydrocarbons (731 mg HC/g TOC) at low maturation temperatures (340 °C). The hydrocarbon (HC) group compositions are different between the expelled oil (with more aromatic HC and saturated HC) and the residual oil (with more resin fraction and asphaltene). The Pr/Ph ratio (up to 4.01) of the expelled hydrocarbons was much higher than that in residual oil (<1.0). Maturity-related biomarkers Ts/(Ts + Tm), and αααC29-20S/(20S + 20R) and C29-αββ/(ααα + αββ), also showed complicated variations with pyrolysis temperature, especially at post peak oil generation. C27-, C28-, and C29- sterane distributions showed variations with pyrolysis temperature. Therefore, without considering the influence of maturity on the abundance of compounds, either source, maturity and/or organic matter type from the chemical characteristics may not be correct.

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THE REVIEW OF UNCONVENTIONAL OIL PRICE FLUCTUATIONS AND FORECASTING

Laisvalaikio tyrimai ◽

10.33607//elt.v2i8.232 ◽

2016 ◽

Vol 2 (8) ◽

pp. 1-14

Author(s):

Jūratė Kuklytė

Keyword(s):

International Trade ◽

Oil Shale ◽

Oil Production ◽

Oil Price ◽

Production Costs ◽

Fuel Oil ◽

Synthetic Oil ◽

Energy Product ◽

Unconventional Oil ◽

The Cost

Relevance of the research.Due to the effect of globalization and integration processes, it is impossible to imagine a world without oil, as the oil price changes affect not only the financial markets but also international trade circulation (Babatunde et al., 2013; Bastiani et al.,2016.; Caporale, et al.,2016.; Humphrey et al.,2016). Oil demand is growing rapidly. It is necessary for mineral-based fuels, lubricants, plastics and various products of the chemical industry and other uses. High consumer demandled to synthetic oil production, known as non-traditional oil production methods (Grushevenko, E., Grushevenko, D., 2012a). Unconventional oil is a synthetic energy product designed to convert one fuel source (fuel oil, shale, sandresin) to another, but it requires a tremendous amount of heat and fresh water, however, synthetic oil is much cheaper to extract than conventional oil from deep sources in the context of limited resources.Further increasing investor interest in oil production from unconventional reserves (oil, shale, sand) for a much lower production costs and cost dynamics and higher return on investment projects in return has been reported occasionally. Since the period of 2006–2011 break even price of oil, extracted from the shale has changed, the cost has doubled –from 105 US dollars/barrel to 48 US dollars/barrel. During the same period, the cost-effectiveness of oil extracted from tar sand deposits price increased by 20% and accounted for around 73 US dollars/barrel. Based on the present state of international trade realities and trends it can be suggested that fluctuations in oil prices is becoming a major factor in rising geopolitical tensions and fears of financial market turmoil.

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