Physical and Mathematical Analysis of the Radial Water/ Oil Displacement in Porous Media and Determination of Hydrodynamic Parameters as well as Time of Exploitation of the Layer (Published)
Displacement of oil with water is a process that is often encountered in the exploitation of oil fields. In these natural conditions, this process takes place in the layers that work in the water drive regime (with pressure), also it is created in the layers where water is injected to keep the energy of the layer constant, or to raise it. Therefore, the problem of displacing oil with water is of great practical importance. The main objective of this paper is to present a link between the physical context of the filtration of the fluid in the porous medium in the case of displacement of oil with water and its mathematical solution in the determination of the hydrodynamic parameters and in the determination of the time needed for the water-oil contact to move from its initial position to another position in the layer, as well as the time of full exploitation of the layer.
Keywords: Exploitation, Pressure, compressibility, equation, pay zone, radial flow, reservoir, time
Bubble Point Pressure Correlation for Deep Offshore Region of Nigeria (Published)
Producing oil from deep offshore fields poses serious risk especially due to peculiar pressure and temperature regimes characterizing the fields. These variables affects the bubble point of the produced hydrocarbon in such fields. The significance of Bubble point pressure and gas solubility has led researchers to continually develop correlations to accurately predict these reservoir oil properties. In this work, measured bubble point pressure is first evaluated and a new correlation is established to estimate crude oil bubble point pressure for deep offshore region of West Africa. Nonlinear Multiple Regression analysis was utilized. The correlation applies to API crude oils ranging from 38 to 56. Comparison with other published ones of this new correlation indicates that it is much more precise than the others. The developed correlation’s Average Absolute Percent Error (percentage) is 4.8 percent. The result is indicative of an agreement between the measured and estimated data.
Keywords: - bubble point, Correlation, Nigeria, Pressure, deep offshore