Sentence examples for drainage radius from inspiring English sources
We consider two boundary conditions at the aquifer drainage radius, constant pressure or an infinite aquifer.
The effective drainage radius is in negative linear relation with VL and in positive exponent relation with PL.
A recent work presented two techniques for estimating permeability and well drainage radius, for solution-gas drive reservoirs.
In view of different adsorption constants, the paper conducted the numerical simulation of pre-drainage gas in drillings along coal seam, studied the relationship of adsorption constants and permeability, gas pressure, and effective drainage radius of coal seams, and applied the approach to the layout of pre-drainage gas drillings in coal seams.
The results indicate that the critical reservoir ratio (CRR), liquid column height (LCH), and gas content are the most important factors in determining well productivity, followed by the equivalent drainage radius (EDR), the volume of frac sand, and the decline rate of working fluid levels during initial production.
Production data from four surface to inseam medium radius gas drainage boreholes was modelled and history matched.
The rock, fluid and system properties, used in developing previous correlations found in literature, were limited to reservoir pressure, reservoir temperature, gas specific gravity, reservoir permeability, wellbore radius, well drainage area, and shape factor.
A new and more accurate parameter is proposed to predict the threshold radius during primary drainage.
The results show that a constant vacuum pressure boundary condition can be enough to describe a perforated pipe surrounded by drainage gravel with a reasonable value of well radius, such as half the radius of gravel fill.
They comprehend: bulk and surface diffusion of the surfactant; evaporation of liquid from the film; variation of the film radius during the process of drainage; inhomogeneity of the film thickness, etc.
