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Dynamic imaging of oil shale pyrolysis using synchrotron X-ray microtomography
Authors:
Tarik
Saif
(Imperial College London)
,
Qingyang
Lin
(Imperial College London)
,
Kamaljit
Singh
(Imperial College London)
,
Branko
Bijeljic
(Imperial College London)
,
Martin J.
Blunt
(Imperial College London)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Geophysical Research Letters
, VOL 43
, PAGES 6799 - 6807
State:
Published (Approved)
Published:
July 2016
Diamond Proposal Number(s):
11587

Abstract: The structure and connectivity of the pore space during the pyrolysis of oil shales determines hydrocarbon flow behavior and ultimate recovery. We image the time evolution of the pore and microfracture networks during oil shale pyrolysis using synchrotron X-ray microtomography. Immature Green River (Mahogany Zone) shale samples were thermally matured under vacuum conditions at temperatures up to 500°C while being periodically imaged with a 2 µm voxel size. The structural transformation of both organic-rich and organic-lean layers within the shale was quantified. The images reveal a dramatic change in porosity accompanying pyrolysis between 390 and 400°C with the formation of micron-scale heterogeneous pores. With a further increase in temperature, the pores steadily expand resulting in connected microfracture networks that predominantly develop along the kerogen-rich laminations.
Journal Keywords: dynamic imaging; synchrotron; oil shale pyrolysis; kerogen; pore structure; pore connectivity; 1859 Rocks; physical properties; Microstructure; Permeability and porosity; Thermal properties; Tomography and imaging
Subject Areas:
Earth Science,
Technique Development,
Energy
Instruments:
I13-2-Diamond Manchester Imaging
Added On:
16/11/2016 13:17
Documents:
Saif_et_al-2016-Geophysical_Research_Letters.pdf
Discipline Tags:
Technique Development - Earth Sciences & Environment
Earth Sciences & Environment
Geology
Geophysics
Technical Tags:
Imaging
Tomography