My research work focuses on three-dimensional imaging of multiphase flow in permeable media using both in-house and synchrotron X-ray micro-tomography, with applications to oil recovery from reservoirs, remediation of contaminated soils and geological sequestration of CO2.
(i) Pore-scale dynamics of immiscible fluid flow through media using ultrafast synchrotron X-ray micro-tomography. The animation shows the displacement of oil (red) by brine (transparent) in the pores space (semi-transparent) of a carbonate rock sample. The colorbar indicates the pore radius (µm).(ii) Effect of wettability on capillary trapping of oil at reservoir conditions (high pressure and elevated temperature).
(iii) Multi-scale characterisation of carbonate rocks dissolution during supercritical CO2-saturated brine injection: FIBSEM, Confocal and X-ray micro-tomographic imaging.
Other curiosity-driven projects
(i) Architectural design of smart ventilation and drainage systems in termite nests.
(ii) Three-dimensional microstructure of lignocelluloses and their implications for the performance of the catalytic upstream biorefining.
Videos of interest
(1) Oil displacing brine in a water-wet carbonate rock sample - Drainage.
(2) Brine displacing oil in a water-wet carbonate rock sample - Secondary imbibition.
(3) Interfacial curvature mapping during snap-off leading to oil trapping in a water-wet carbonate rock.
Research Associate, Department of Earth Science and Engineering, Imperial College London, UK (Dec 2013 - ).
Postdoctoral Research Fellow, Beamline ID-15A, European Synchrotron Radiation Facility (ESRF), Grenoble, France (Nov 2011 - Nov 2013).
Postdoctoral Research Fellow, Max-Planck Institute for Dynamics and Self-Organization, Goettingen, Germany & Saarland University, Saarbruecken, Germany (May 2009 - Oct 2011).
PhD Researcher (Civil Engineering), School of Engineering and Information Technology (formerly Aerospace, Civil and Mechanical Engineering), The University of New South Wales at Australian Defence Force Academy, Canberra, Australia (July 2004 - March 2009).
Research Assistant, Punjab Engineering College/Panjab University, Chandigarh, India (July 2002 - June 2004).
M.E. (Environmental Engineering), Punjab Engineering College/Panjab University, Chandigarh, India (2000 - 2002).
B.E. (Civil Engineering), GNE/ Punjab Technical University, India (1996 - 2000).
Arthur Holmes Centenary Research Grant, 2018 (£700).
Awarded Supplementary Transcript by the University of New South Wales (Australia) for special achievements, including academic achievement, sporting achievement, leadership and service contribution to the University during PhD, 2010.
BSTS grant for visiting Niels Bohr Institute, University of Copenhagen, Denmark, 2007 ($5000).
PRSS grant by the University of New South Wales at ADFA, Australia, 2007 ($2800).
Best Poster Presentation at the University of New South Wales at ADFA, Australia, 2005 ($700).
RTS award for PhD at the University of New South Wales at ADFA, Australia, 2004-2008.
National level GATE scholarship for Master of Engineering, India, 2000-2002.
invited talks and Research Highlights
Invited speaker at the Interpore 10th Annual Meeting and Jubilee Conference, May 14-17, 2018, New Orleans, USA.
Invited speaker at the Imaging the Microstructure of Reservoir Rocks in 3D and 4D workshop, 80th EAGE conference & Exhibition 2018, June 15, 2018, Copenhagen, Denmark.
Research highlights: Our work on imaging the dynamics of multiphase flow in permeable media using synchrotron X-ray micro-tomography is showcased in the Diamond Light Source 2017/18 Annual Review.
Shared data on public repositories:
1. Time-resolved synchrotron X-ray micro-tomographic images of drainage and imbibition in a water-wet carbonate rock sample (Data: approx. 1000 three-dimensional X-ray micro-tomographic images).
Repository: British Geological Survey (BGS). http://dx.doi.org/10.5285/3aa44060-d4fd-453f-9e5b-7d885ad5089f.
2. High resolution X-ray micro-tomography for in-situ effective contact angle analysis in carbonate rocks.
Repository: Digital Rock Portal, University of Texas at Austin. doi:10.17612/P7D95F
3. FIB-SEM and X-ray micro-tomographic images of carbonate rock dissolution during reactive CO2-saturated brine injection under reservoir conditions.
Repository: British Geological Survey (BGS). http://dx.doi.org/10.5285/31a77ab1-8f21-4a10-8540-034da0dece1e
4. Micro- and medical X-ray tomographic images of termite nests from Senegal and Guinea.
Repository: Figshare. https://doi.org/10.6084/m9.figshare.5698069.v1.
Peer Reviewer for Journals
Advances in Water Resources (Elsevier); Environmental Science and Pollution Research (Springer); Environmental Science & Technology (ACS); Journal of Hydrology (Elsevier); Journal of Microscopy (The Royal Microscopical Society); Journal of Petroleum Science and Engineering (Elsevier); Water (MDPI AG); and Water Resources Research (AGU).
et al., 2019, The Effect of Mixed Wettability on Pore-Scale Flow Regimes Based on a Flooding Experiment in Ketton Limestone, Geophysical Research Letters, Vol:46, ISSN:0094-8276, Pages:3225-3234
et al., 2019, The architectural design of smart ventilation and drainage systems in termite nests, Science Advances, Vol:5, ISSN:2375-2548
et al., 2019, Capillary-Dominated Fluid Displacement in Porous Media, Annual Review of Fluid Mechanics, Vol 51, Vol:51, ISSN:0066-4189, Pages:429-449
et al., 2018, Timeresolved synchrotron X-ray micro-tomography datasets of drainage and imbibition in carbonate rocks, Scientific Data, Vol:5, ISSN:2052-4463
et al., 2018, Partial dissolution of carbonate rock grains during reactive CO<inf>2</inf>-saturated brine injection under reservoir conditions, Advances in Water Resources, Vol:122, ISSN:0309-1708, Pages:27-36