| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Buckman, Jim
Heriot-Watt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Thermoelectric properties of the aliovalent half-Heusler alloy Zn 0.5 Ti 0.5 NiSb with intrinsic low thermal conductivitycitations
- 2023Thermoelectric properties of the aliovalent half-Heusler alloy Zn0.5Ti0.5NiSb with intrinsic low thermal conductivitycitations
- 2022Unravelling the role of natural imperfections on the mechanical behaviour of cemented granular systems: insights from naturally weakly cemented sands
- 2021Evolution of meniscus structures in hydrophobic granular systemscitations
- 2019Optimizing Thermoelectric Power Factor in p-Type Hydrogenated Nano-crystalline Silicon Thin Films by Varying Carrier Concentrationcitations
- 2019Phase stability and thermoelectric properties of TiCoSb-TiM2Sn (M = Ni, Fe) Heusler compositescitations
- 2018Grain-by-grain compositional variations and interstitial metals—a new route toward achieving high performance in half-Heusler thermoelectricscitations
- 2018Analysis of Sandstone Pore Space Fluid Saturation and Mineralogy Variation via Application of Monostatic K-Band Frequency Modulated Continuous Wave Radarcitations
- 2018Hydrogenated Nano-/Micro-Crystalline Silicon Thin-Films for Thermoelectricscitations
- 2018Grain-by-grain compositional variations and interstitial metals - a new route towards achieving high performance in Half-Heusler thermoelectricscitations
- 2018Substitution versus full-Heusler segregation in TiCoSbcitations
- 2018Grain-Scale Heterogeneity in Deep Water Massive Sands – Implications for Depositional Processes and Reservoir Quality
- 2018Grain-by-Grain Compositional Variations and Interstitial Metals -: A New Route toward Achieving High Performance in Half-Heusler Thermoelectricscitations
- 2016Monitoring micro-crack healing in an engineered cementitious composite using the environmental scanning electron microscopecitations
- 2016Thermoelectric properties and high-temperature stability of the Ti1-xVxCoSb1-xSnx half-Heusler alloyscitations
Places of action
| Organizations | Location | People |
|---|
document
Grain-Scale Heterogeneity in Deep Water Massive Sands – Implications for Depositional Processes and Reservoir Quality
Abstract
Deep water massive sands are ubiquitous in the deep-marine record and form excellent reservoirs for hydrocarbons. At the bed-scale, the sedimentologically homogenous nature of these sands has been the root cause of the controversy concerning their emplacing mechanism(s). However, sedimentary deposits are intrinsically heterogeneous at a variety of scales. This heterogeneity can be investigated to shed light on the very mechanism(s) responsible for depositing massive sands, as well as assessing the reservoir quality within the beds. To this end, vertical grain-scale heterogeneity (grain size, sorting and fabric) within six massive beds from the Grés de Peïra Cava (SE France) and the Numidian Flysch (northern Tunisia) was investigated in back-scatter electron images using digital image analysis. Images parallel to the bedding plane and perpendicular to the apparent grain long-axis orientation were acquired to minimise the uncertainty in the grain size and fabric, and increase the statistical significance of the data. Hypothesis testing was employed to reduce the subjectivity in assigning vertical trends within each bed. Results show that the majority of the massive sands contain statistically significant vertical variation in grain size and fabric (p-values <0.01). A vertically diverging followed by converging grain size profile involving the coarse- (90th) and fine-tail (10th) components is seen three of the beds. The remaining beds reveal an anomalous ‘undulating’ or statistically ungraded trend across the various percentiles. Grain fabric in the bedding parallel sections show a consistently flow-oblique trend with an average azimuthal deviation of 47°, but becoming increasingly flow aligned at the top of most beds. However, there is little consistency in the mean vector rotation about the palaeocurrent direction. All bedding perpendicular sections show imbrication angles greater than 15°, with an average imbrication angle relative to the horizontal of 80°. Both up- and down-current imbrication polarities were observed in equal abundance. These grain-scale heterogeneities are interpreted as a product of differential impact of near-bed sedimentation processes that are controlled by sediment fallout rates from a concentrated, but turbulent sediment gravity flow. The resulting geometric character of the grains can be used as a tool to determine high porosity-permeability zones at the bed-scale, and ultimately as predictive inputs during the development phase.