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Research Output 1990 2019

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2019

Green synthesis of ZnO/SiO2 nanocomposite from pomegranate seed extract: Coating by natural xanthan polymer and its characterisations

Ali, J. A., Kolo, K., Mohammed Sajadi, S., Manshad, A. K. & Stephen, K. D., 29 May 2019, In : Micro and Nano Letters. 14, 6, p. 638-641 4 p.

Research output: Contribution to journalArticle

Seed
seeds
Nanocomposites
nanocomposites
Polymers
solute
flooding
salinity
advection-diffusion equation
oil

Low-Salinity Polymeric Nanofluid-Enhanced Oil Recovery Using Green Polymer-Coated ZnO/SiO 2 Nanocomposites in the Upper Qamchuqa Formation in Kurdistan Region, Iraq

Ali, J. A., Kolo, K., Khaksar Manshad, A. & Stephen, K. D., 21 Feb 2019, In : Energy and Fuels. 33, 2, p. 927-937 11 p.

Research output: Contribution to journalArticle

Nanocomposites
Polymers
Oils
Surface tension
Recovery

Modification of LoSal water performance in reducing interfacial tension using green ZnO/SiO2 nanocomposite coated by xanthan

Ali, J. A., Kolo, K., Manshad, A. K., Stephen, K. & Keshavarz, A., Apr 2019, In : Applied Nanoscience. 9, 3, p. 397-409 13 p.

Research output: Contribution to journalArticle

Nanocomposites
Surface Tension
Salinity
salinity
Surface tension

Nano-fluid viscosity screening and study of in situ foam pressure buildup at high-temperature high-pressure conditions

Hamza, M. F., Soleimani, H., Merican, Z. M. A., Sinnathambi, C. M., Stephen, K. D. & Ahmad, A. A., 8 Aug 2019, In : Journal of Petroleum Exploration and Production Technology. p. 1-12 12 p.

Research output: Contribution to journalArticle

Open Access
File
foam
Foams
Screening
viscosity
Viscosity

Novel Observations of Salinity Transport in Low-Salinity Waterflooding

Al-Ibadi, H., Stephen, K. & Mackay, E., Jun 2019, In : SPE Journal. 24, 3, p. 1108-1122 15 p.

Research output: Contribution to journalArticle

Well flooding
salinity
Advection
Water
advection
2018

A laboratory study of chemical enhanced oil recovery (CEOR) in compartmentalized sandstone reservoir: A case study of a 2-D phase macro-model reservoir

Hamza, M., Merican, Z., Soleimani, H., Abghari, S., Sinnathambi, C. & Stephen, K. D., Feb 2018, In : ARPN Journal of Engineering and Applied Sciences. 13, 3, p. 893-901 9 p.

Research output: Contribution to journalArticle

Open Access
enhanced oil recovery
sandstone
flooding
oil
water
analytical method
history
simulation
spreadsheet
simulator
Open Access
File
history
uncertainty analysis
deconvolution
seismic data
simulation

Effect of SiO2 on the foamability, thermal stability and interfacial tension of a novel nano-fluid hybrid surfactant

Hamza, M., Sinnathambi, C., Merican, Z., Soleimani, H. & Stephen, K. D., Jan 2018, In : International Journal of Advanced and Applied Sciences. 5, 1, p. 113-122 10 p.

Research output: Contribution to journalArticle

Open Access
File
Surface tension
Surface active agents
Thermodynamic stability
Fluids
Foams

Laboratory Characterization of crude oil and sandstone reservoir for Chemical Enhanced Oil Recovery

Hamza, M. F., Soleimani, H., Sinnathambi, C. M., Merican, Z. M. A. & Stephen, K. D., 11 Jun 2018, In : World Journal of Engineering . 15, 3, p. 354-361 8 p.

Research output: Contribution to journalArticle

Open Access
File
Petroleum reservoirs
Sandstone
Oil fields
Crude oil
Recovery
2017

An Overview of the Present Stability and Performance of EOR-Foam

Hamza, M. F., Sinnathambi, C. M., Merican, Z. M. A., Soleimani, H. & Stephen, K. D., Sep 2017, In : Sains Malaysiana. 46, 9, p. 1641–1650 10 p.

Research output: Contribution to journalArticle

Open Access
Foams
Oil fields
Recovery
Fluids
Gases
2014
Open Access
File
seismic data
history
prediction
filter
normalisation
2013

Optimal parameter updating in assisted history matching using streamlines as a guide

Kazemi, A. & Stephen, K. D., May 2013, In : Oil and Gas Science and Technology. 68, 3, p. 577-594 18 p.

Research output: Contribution to journalArticle

Shale
Uncertainty
turbidite
outcrop
permeability
gravel
simulation
Open Access
File
history
well
seismic data
prediction
simulation
2012

Schemes for automatic history matching of reservoir modeling: A case of Nelson oilfield in UK

Kazemi, A. & Stephen, K. D., Jun 2012, In : Petroleum Exploration and Development. 39, 3, p. 349–361 13 p.

Research output: Contribution to journalArticle

history
modeling
simulation
seismic data
parameter
2011

Exploring the effect of meso-scale shale beds on a reservoir's overall stress sensitivity to seismic waves

MacBeth, C., HajNasser, Y., Stephen, K. & Gardiner, A. R., Jan 2011, In : Geophysical Prospecting. 59, 1, p. 90-110 21 p.

Research output: Contribution to journalArticle

seismic wave
shale
prediction
elastic wave
in situ stress
2010

Faster convergence in seismic history matching by divding and conquering the unknowns

Sedighi Dehkordi, F. & Stephen, K. D., Dec 2010, In : SPE Journal. 15, 4, p. 1077-1088 12 p.

Research output: Contribution to journalArticle

2009
continental shelf
history
simulator
permeability
simulation
2008

Assessing the effect of geological uncertainty on recovery estimates in shallow-marine reservoirs: The application of reservoir engineering to the SAIGUP project

Matthews, J. D., Carter, J. N., Stephen, K. D., Zimmerman, R. W., Skorstad, A., Manzocchi, T. & Howell, J. A., Feb 2008, In : Petroleum Geoscience. 14, 1, p. 35-44 10 p.

Research output: Contribution to journalArticle

engineering
simulation
effect
project
development plan

A study of the structural controls on oil recovery from shallow-marine reservoirs

Manzocchi, T., Matthews, J. D., Strand, J. A., Carter, J. N., Skorstad, A., Howell, J. A., Stephen, K. D. & Walsh, J. J., Feb 2008, In : Petroleum Geoscience. 14, 1, p. 55-70 16 p.

Research output: Contribution to journalArticle

structural control
oil
economics
rock
aggradation
history
prediction
simulation
seismic survey
seismic response

Seismic scale saturation relations in turbidite reservoirs undergoing waterflood

MacBeth, C. & Stephen, K. D., 2008, In : Geophysical Prospecting. 56, 5, p. 693-714 22 p.

Research output: Contribution to journalArticle

turbidite
saturation
fluid
geology
seismic property

Sensitivity of the impact of geological uncertainty on production from faulted and unfaulted shallow-marine oil reservoirs: Objectives and methods

Manzocchi, T., Carter, J. N., Skorstad, A., Fjellvoll, B., Stephen, K. D., Howell, J. A., Matthews, J. D., Walsh, J. J., Nepveu, M., Bos, C., Cole, J., Egberts, P., Flint, S., Hern, C., Holden, L., Hovland, H., Jackson, H., Kolbjörnsen, O., MacDonald, A., Nell, P. A. R. & 7 others, Onyeagoro, K., Strand, J., Syversveen, A. R., Tchistiakov, A., Yang, C., Yielding, G. & Zimmerman, R. W., Feb 2008, In : Petroleum Geoscience. 14, 1, p. 3-15 13 p.

Research output: Contribution to journalArticle

oil
upscaling
permeability
oil field
river system

Study of the structural controls on oil recovery from shallow-marine reservoirs

Manzocchi, T., Matthews, J. D., Strand, J. A., Carter, J. N., Skorstad, A., Howell, J. A., Stephen, K. D. & Walsh, J. J., Feb 2008, In : Petroleum Geoscience. 14, 1, p. 55-70 16 p.

Research output: Contribution to journalArticle

Upscaling uncertainty analysis in a shallow-marine environment

Stephen, K. D., Yang, C., Carter, J. N., Howell, J. A., Manzocchi, T. & Skorstad, A., Feb 2008, In : Petroleum Geoscience. 14, 1, p. 71-84 14 p.

Research output: Contribution to journalArticle

upscaling
uncertainty analysis
marine environment
capillary pressure
shoreline
2007

Scale and process dependent model errors in seismic history

Stephen, K. D., Mar 2007, In : Oil and Gas Science and Technology. 62, 2, p. 123-135 13 p.

Research output: Contribution to journalArticle

Scale and process dependent model errors in seismic history matching

Stephen, K. D., 2007, In : Oil and Gas Science and Technology. 62, 2 SPECIAL ISSUE, p. 123-135 13 p.

Research output: Contribution to journalArticle

history
upscaling
simulation
seismic data
transform
2006

Multiple-model seismic and production history matching: a case study

Stephen, K. D., Soldo, J., MacBeth, C. & Christie, M. A., Dec 2006, In : SPE Journal. 11, 4, p. 418-430 13 p.

Research output: Contribution to journalArticle

Seismic history matching in the UKCS Schiehallion field

Stephen, K. D. & MacBeth, C., Apr 2006, In : First Break. 24, 4, p. 43-49 7 p.

Research output: Contribution to journalArticle

history
well
fluid
modeling
simulation
2005

4D seismic signature of oil-water contact movement due to natural production in a stacked turbidite reservoir

MacBeth, C., Stephen, K. D. & McInally, A., Mar 2005, In : Geophysical Prospecting. 53, 2, p. 183-203 21 p.

Research output: Contribution to journalArticle

Multi-stage upscaling: Selection of suitable methods

Pickup, G. E., Stephen, K. D., Ma, J., Zhang, P. & Clark, J. D., Jan 2005, In : Transport in Porous Media. 58, 1-2, p. 191-216 26 p.

Research output: Contribution to journalArticle

upscaling
rock
fluid flow
sandstone
well

Multi-stage upscaling: selection of suitable methods

Pickup, G. E., Stephen, K. D., Ma, J., Zhang, P. & Clark, J. D., 2005, In : Transport in Porous Media. 58, 1-2, p. 191-216 26 p.

Research output: Contribution to journalArticle

The 4D seismic signature of oil-water contact movement due to natural production in a stacked turbidite reservoir

MacBeth, C., Stephen, K. D. & McInally, A., Mar 2005, In : Geophysical Prospecting. 53, 2, p. 183-203 21 p.

Research output: Contribution to journalArticle

turbidite
fluid
oil
seismic survey
water
2002

Reservoir simulations developed from an outcrop of incised valley fill strata

Stephen, K. D. & Dalrymple, M., May 2002, In : AAPG Bulletin. 86, 5, p. 797-822 26 p.

Research output: Contribution to journalArticle

incised valley
valley fill
outcrop
lithofacies
simulation
2001

Outcrop-based stochastic modelling of turbidite amalgamation and its effects on hydrocarbon recovery

Stephen, K. D., Clark, J. D. & Gardiner, A. R., 2001, In : Petroleum Geoscience. 7, 2, p. 163-172 10 p.

Research output: Contribution to journalArticle

turbidite
shale
outcrop
hydrocarbon
sandstone
incompressible flow
two phase flow
gravity
upscaling
convection
2000

An assessment of steady-state scale-up for small-scale geological models

Pickup, G. E. & Stephen, K. D., 2000, In : Petroleum Geoscience. 6, 3, p. 203-210 8 p.

Research output: Contribution to journalArticle

permeability
trapping
simulation
oil
sedimentary structure

Assessment of steady-state scale-up for small-scale geological models

Pickup, G. E. & Stephen, K. D., Aug 2000, In : Petroleum Geoscience. 6, 3, p. 203-210 8 p.

Research output: Contribution to journalArticle

1998

Gas diffusion coefficient profile in peat determined by modelling mass spectrometric data: implications for gas phase distribution

Stephen, K. D., Arah, J. R. M., Thomas, K. L., Benstead, J. & Lloyd, D., 1 Mar 1998, In : Soil Biology and Biochemistry. 30, 3, p. 429-431 3 p.

Research output: Contribution to journalArticle

Methanogenesis and CO2 exchange in an ombrotrophic peat bog - implications for gas distribution

Lloyd, D., Thomas, K. L., Benstead, J., Davies, K. L., Lloyd, S. H., Arah, J. R. M. & Stephen, K. D., Oct 1998, In : Atmospheric Environment. 32, 19, p. 3229-3238 10 p.

Research output: Contribution to journalArticle

Model of the processes leading to methane emission from peatland

Arah, J. R. M. & Stephen, K. D., Oct 1998, In : Atmospheric Environment. 32, 19, p. 3257-3264 8 p.

Research output: Contribution to journalArticle

Root-mediated gas transport in peat determined by argon diffusion

Stephen, K. D., Arah, J. R. M., Daulat, W. & Clymo, R. S., 15 Apr 1998, In : Soil Biology and Biochemistry. 30, 4, p. 501-508 8 p.

Research output: Contribution to journalArticle

vascular plants
peat
Menyanthes trifoliata
gases
Sphagnum
1997

Oxidation of methane in peat: kinetics of CH4 and O2 removal and the role of plant roots

Stephen, K. D., Nedwell, D. & Arah, J. R. M., Aug 1997, In : Soil Biology and Biochemistry. 29, 8, p. 1257-1267 11 p.

Research output: Contribution to journalArticle

1990

Absorptive optically bistable arrays

Stephen, K. D., 1990, In : Journal of Modern Optics. 37, 4, p. 627-638 12 p.

Research output: Contribution to journalArticle

optical bistability
pixels
cavities
amorphous semiconductors
diffusion length