Papers by Iylia Elena Abdul Jamil
In the moving layer of particles with variable concentration, the shear estimation is not directl... more In the moving layer of particles with variable concentration, the shear estimation is not directly predictable and there is no existing clear mathematical or empirical formula to achieve this objective. This paper presents a developed approach to estimate the shear forces in a flow having suspended and moving layers of solid particles in liquid flow. The two-layer approach was taken whereby the flow consisting of one upper suspended layer of particles in the liquid, and the bottom layer was the moving bed of particles. In the present work, the method of finding the force acting on the pipe wall by the particles in the layer, termed as the ‘dry force’, was presented using a “pseudo hydrostatic pressure” method. To attain the equation for the dry force, a mathematical approach is taken with the assumptions that the flow is horizontal, two-phase pipe flow (solid in Newtonian liquid), incompressible and it is at steady-state. The analysis was conducted considering various particles dens...
The maturing oil fields with increasing water production can pose a challenge in terms of produce... more The maturing oil fields with increasing water production can pose a challenge in terms of produced water handling and disposal issues. This paper presents the modelling and simulation procedure of the two-phase flow of water/oil in a downhole using ANSYS- FLUENT 14 software. The developed procedure successfully simulated the production zone and the interaction of the two fluids in a natural environment where the reservoir pressure is the sole driving force. The results show significant difference of volume distribution in the flows with different oil content. The model can become an essential tool to assist in prediction of the behavior of oil/water mixture flow in the wellbores, and to serve in designing downhole oil/water separators.
Energy and Sustainability VII, Sep 20, 2017
Downhole oil/water separation methods are based on hydrocyclone technique. Most of the related in... more Downhole oil/water separation methods are based on hydrocyclone technique. Most of the related investigations have a focus on the flow structure inside the cyclone. There is a lack of studies and simulations on the wellbore flow pre-and post-separation. The current computational simulation of the oil/water flowing inside wellbore before and after separation by counter current hydrocyclone. The emulsion of oil/water in the well production and dumping zones in the downhole, was simulated using ANSYS-Fluent 14 software and it was attempted to visualize the volume fraction profiles, density distribution profiles and the flow patterns in a real downhole environment. The well geometries and the oil/water production candidates at the downhole have been adopted from a real well in an offshore field in Malaysia. The results illustrated the great complexity of oil/water flows, reflecting the many competing processes; e.g. turbulence, gravitational separation, droplets interaction and the shear between the two liquids and with the solid surfaces. The simulation results in the production zone indicate that distribution of the oil volume fraction depends highly on the mean oil volume fraction. The contour results showed that the phases mix and achieve uniform distribution as the flow proceeds down the annulus. The achieved simulation results will contribute to better forecasting of the behaviour of oil/water mixture inside the wellbores with the presence of a hydrocyclone with one or multi inlets.
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Papers by Iylia Elena Abdul Jamil