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Neutron scattering study of strain behaviour of porous rocks subjected to heating and unconfined uniaxial compression.

Faisal, Nadimul Haque; Sanaee, Reza; Singh, Rao Martand; Murray, John; McLaughlin, Abbie; Healy, David; Lee, Tung-Lik

Authors

Rao Martand Singh

John Murray

Abbie McLaughlin

David Healy

Tung-Lik Lee



Abstract

Neutron scattering (at ENGIN-X) was used to examine strain distributions in two hydrocarbon reservoir rock types (i.e. sandstone and chalk) under uniaxial stress (up to 35 MPa) at temperature as high as 70 °C to utilise the advantages of neutron scattering to draw a detailed picture of the structural evolution in the porous rock core plugs subjected to heating. Each sample was cylindrical in shape (i.e. 38.1 mm diameter and 48 mm length). The corresponding strain free lattice parameter (d0) for each sample at each measurement point at 5 MPa compressive stress condition were obtained by testing at 25°C. Various microstructural and material characterisation were carried out using X-ray diffraction, energy dispersive spectroscopy and scanning electron microscopy. Comparison of Rietveld refinement for multiple peak of crystalline phases in both samples were made. Results are discussed in terms of the influence of temperature and compressive stress on the residual strain profile along radial direction of cylindrical rock sample. It was found that the sandstone sample has significantly high strain bearing capability when compared with the chalk, however, the overall strain profile from the central axis in the radial direction looked very similar.

Citation

FAISAL, N.H., SANAEE, R., SINGH, R.M., MURRAY, J., MCLAUGHLIN, A., HEALY, D. and LEE, T.-L. 2018. Neutron scattering study of strain behaviour of porous rocks subjected to heating and unconfined uniaxial compression. Journal of physics: conference series [online], 1106: proceedings of the 2018 Modern practice in stress and vibration analysis (MPSVA 2018), 2-4 July 2018, Cambridge, UK, article ID 012011. Available from: https://doi.org/10.1088/1742-6596/1106/1/012011

Journal Article Type Conference Paper
Conference Name 2018 Modern practice in stress and vibration analysis (MPSVA 2018)
Conference Location Cambridge, UK
Acceptance Date Sep 14, 2018
Online Publication Date Nov 5, 2018
Publication Date Dec 31, 2018
Deposit Date Sep 25, 2018
Publicly Available Date Sep 25, 2018
Journal Journal of physics: conference series
Print ISSN 1742-6588
Electronic ISSN 1742-6596
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 1106
Article Number 012011
DOI https://doi.org/10.1088/1742-6596/1106/1/012011
Keywords Neutron scattering; Stress strain; Rock failure; Oil and gas; Carbon sequestration; Compressive stress behaviour
Public URL http://hdl.handle.net/10059/3146

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