High-Pressure Pyrolysis of Green River Oil Shale

Burnham, A.K.; Singleton, M.F.

doi:10.1021/bk-1983-0230.ch017

Cited by 48 publications

(54 citation statements)

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“…Previous studies have shown that stress can cause a decrease in oil yield or systematic changes in the composition of shale oil generated [68,69]. Similarly, the stress can also affect the development of pore structure and the transmission capacity of the hydrocarbon product during pyrolysis.…”

Section: Discussionmentioning

confidence: 99%

Influence of In Situ Pyrolysis on the Evolution of Pore Structure of Oil Shale

Liu

Yang

et al. 2018

Energies

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The evolution of pore structure during in situ underground exploitation of oil shale directly affects the diffusion and permeability of pyrolysis products. In this study, on the basis of mineral analysis and thermogravimetric results, in combination with the low-pressure nitrogen adsorption (LPNA) and mercury intrusion porosimetry (MIP) technique, the evolution of pore structure from 23 to 650 • C is quantitatively analyzed by simulating in situ pyrolysis under pressure and temperature conditions. Furthermore, based on the experimental results, we analyze the mechanism of pore structure evolution. The results show the following: (1) The organic matter of Fushun oil shale has a degradation stage in the temperature range of 350-540 • C, and there is no obvious temperature gradient between decomposition of kerogen and the secondary decomposition of bitumen. The thermal response mechanisms of organic matter and minerals are different in each temperature stage, and influence the change of pore structure. (2) Significant changes occur in pore shape at 350 • C, where thermal decomposition of kerogen begins. The ink-bottle pores are dominant when the temperature is less than 350 • C, whereas slit pores dominate when the temperature is greater than 350 • C. (3) The change in pore structure of oil shale is much less significant from 23 to 350 • C. The pore volume, porosity, and specific surface area (SSA) of samples increase rapidly with temperature varying from 350 to 600 • C. The variation of each parameter is dissimilated from 600 to 650 • C: the porosity and pore volume increases with a small gradient from 600 to 650 • C, and SSA decreases significantly. (4) The lithostatic pressure does not cause change in the evolution discipline of the pore structure, but the inhibitory effect on the pore development is significant.

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Section: Discussionmentioning

confidence: 99%

Influence of In Situ Pyrolysis on the Evolution of Pore Structure of Oil Shale

Liu

Yang

et al. 2018

Energies

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“…However, the work of Jesch and McLaughlin (1984) showed that at temperatures where kerogen starts to decompose the dielectric properties will begin to change significantly. The temperature at which kerogen begins to decompose is driven by chemical kinetics and thus will depend on heating rate (Burnham and Singleton, 1983). Higher heating rates will lead to kerogen breakdown at higher temperatures, but lower heating rates will lead to kerogen breakdown at lower temperatures (Burnham, 2003) and may actually produce oil with a composition closer to that of naturally produced oil.…”

Section: Discussionmentioning

confidence: 99%

“…Rajeshwar and Inguva (1985) suggest that as temperatures reach the point where the polar molecules in the organic fraction start to mobilize, the dielectric properties will probably begin to increase, but quantitative data is not supplied. Clearly the kerogen in the shale is non-polar and has a low values of dielectric permittivity and loss at frequencies greater than 10 MHz or so until temperatures reach the point where it begins to break down into gas and oil, which are heating rate dependent [see Burnham and Singleton (1983) for discussion of pyrolysis kinetics of Green River oil shale]. Table 1 summarizes the general quantitative observations discussed above from some of the references.…”

Section: Previous Studies Of the Dielectric Properties Of Oil Shalementioning

confidence: 99%

Study of Dielectric Properties of Dry and Saturated Green River Oil Shale

2007

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We measured dielectric permittivity of dry and fluid-saturated Green River oil shale samples over a frequency range of 1 MHz to 1.8 GHz. Dry sample measurements were carried out between room temperature and 146 °C, saturated sample measurements were carried out at room temperature. Samples obtained from the Green River formation of Wyoming and from the Anvil Points Mine in Colorado were cored both parallel and perpendicular to layering. The samples, which all had organic richness in the range of 10-45 gal/ton, showed small variations between samples and a relatively small level of anisotropy of the dielectric properties when dry. The real and imaginary part of the relative dielectric permittivity of dry rock was nearly constant over the frequency range observed, with low values for the imaginary part (loss factor). Saturation with de-ionized water and brine greatly increased the values of the real and imaginary parts of the relative permittivity, especially at the lower frequencies. Temperature effects were relatively small, with initial increases in permittivity to about 60 °C, followed by slight decreases in permittivity that diminished as temperature increased. Implications of these observations for the in situ electromagnetic, or radio frequency (RF) heating of oil shale to produce oil and gas are discussed.

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“…Surface retorting takes place at atmospheric pressures, so little work has been done on the effects of pressure on kerogen conversion. Burnham and Singleton (1983) investigated pyrolysis of Green River oil shale at pressures to 2.74 MPa (Figure 32). The experiments were kinetic experiments carried out at constant heating rate.…”

Section: Figure 30 Thermal Gravimetric and Differential Thermal Gravmentioning

confidence: 99%

GIS-and Web-based Water Resource Geospatial Infrastructure for Oil Shale Development

Minnick

Geza

et al. 2012

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High-Pressure Pyrolysis of Green River Oil Shale

Cited by 48 publications

References 0 publications

Influence of In Situ Pyrolysis on the Evolution of Pore Structure of Oil Shale

Influence of In Situ Pyrolysis on the Evolution of Pore Structure of Oil Shale

Study of Dielectric Properties of Dry and Saturated Green River Oil Shale

GIS-and Web-based Water Resource Geospatial Infrastructure for Oil Shale Development

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