...), matrix porosity (Factor 4), and rock compressibility (C p , Factor 5). In the case of Cartesian model, however, 7 factors Placket-Burman design ( Table 4 ) has been used that includes Factor 1 and 2 the same as cylindrical model, number of horizontal wells (Factor 3), distance between hydraulic...

... transfer model is used to allow conversion of WHP to bottomhole pressure (BHP) by accounting for changing fluid density and compressibility along the wellbore. This model, in turn, allowed us to assess the quality of solutions generated with the WHP data. For DFIT analysis, we adapted the modified-Hall...

... can be used to diagnose wells from other unconventional resources. pressure transient testing diagnostic plot fracture half-length pressure transient analysis drillstem/well testing fraction 0 upstream oil & gas reservoir pressure boundary drillstem testing compressibility psi...

... (2) t a = ( μ g c t ) i ∫ 0 t d t μ ¯ g c ¯ t . Here, μ ¯ g and c ¯ t are gas viscosity and total compressibility at the average reservoir pressure. Traditionally, the average pressure in the whole...

... shale gas drillstem/well testing initial pressure production monitoring complex reservoir shale gas reservoir fracture half-length reservoir surveillance upstream oil & gas analytically ibrahim correction factor production control drillstem testing compressibility square root...

... equality for coal (assuming dry coal and negligible formation compressibility): (2) d d t ( p ¯ z * ) = d d p ( p ¯ z * ) × d p ¯ d ψ ¯ × d ψ ¯ d t Where ψ ( p ) is pseudo-pressure and is defined as: (3...

... Abstract The tank material balance (MB) equation for gas reservoirs has been written taking into account the effective compressibility of matrix and fractures. The method has direct application on stress-sensitive naturally fractured reservoirs (nfr's). Under some conditions ignoring...

... that is completely rigorous. This study presents a new, rigorous MBE for gas flow in the presence of a compressible formation and residual fluid saturation. Examples will be presented to highlight the capabilities of the new MBE. reservoir simulation resource in place estimate compressibility fraction 0...

... data analysis of coal reservoirs only if appropriate reservoir inputs (i.e. desorption compressibility, fracture porosity) are used in the analysis. As the field examples demonstrate, type-curve and pressure-transient analysis methods for production data analysis are not used in isolation for reservoir...

... from 3.8 to 6.6 Tscf. We attempted to history match each of these nine models by using an optimization routine to adjust aquifer support, vertical transmissibility across a potential seal, and rock compressibility. The optimization routine proved to be a very useful and efficient tool to attain good...

... Abstract A new fracture-injection/falloff type-curve analysis method is presented for reservoirs containing slightly compressible and compressible fluids. Type-curve analysis augments conventional before- and after-closure methods, which are also reformulated in terms of adjusted pseudopressure...

... engineers coalbed methane production uniaxial compaction poisson flow model geomechanical property spe 75511 bulk modulus algorithm compressional velocity coal bed methane reservoir characterization compressibility petrophysical algorithm upstream oil & gas coal seam gas flow in porous...

... Table 3 Type-curve analysis of West Virginia gas well. z -Factor at 3,268 and 500 psia – 0.9081and 0.9632 Gas FVF at 3,268 psia rb/Mscf 0.8674 Gas viscosity at 3,268 psia cp 0.0199 Gas compressibility at 3,268 psia psia –1 2.717x10 –4 Pseudopressure at 3,268 and 500...

... control decline curve analysis carter 7 drillstem/well testing gas well drillstem testing upstream oil & gas compressibility type curve analytical solution spe 75532 fetkovich 2 reserves evaluation flow in porous media productivity index reservoir simulation reservoir characterization...

... direct approach reservoir simulation reservoir surveillance influx compressibility complex reservoir production control material balance intercept condensate reservoir aquifer petroleum engineer production monitoring society gas condensate reservoir Introduction Material-Balance (MB...

... a ash, fraction A drainage area, acres b Arps decline curve constant Bw water formation volume factor, rb/stb cf cleat volume compressibility, psia-1 Dg nominal gas decline rate, %/yr Di Arps initial decline coefficient, t-1, day-1 Dw nominal water decline rate...

... Abstract Naturally occurring microfractures, called cleats, provide the permeability essential for bulk fluid flow in coalbed reservoirs. The bulk fluid flow, in turn, is controlled by the cleat properties, specifically their orientation, spacing, compressibility, and effective porosity. A two...

... testing pseudosteady-state flow equation drainage area current dimensionless ipr curve deliverability mishra permeability ipr curve compressibility caudle 3 billiter well performance dimensionless inflow performance relationship curve effect simulator reservoir deliverability equation...

... shows a good agreement with the liquid solution during transient conditions and hence it can be used to estimate the transport properties of gas condensate reservoirs. P. 97 compressibility upstream oil & gas steady-state assumption pressure transient analysis procedure reservoir...

...Conclusions This paper provides an improved p ¯ / z ¯ versus G p plotting technique for reservoirs having variable pore compressibilities as reservoir depletes. The technique is general, but is particularly useful in evaluating gas in place in abnormally high pressure...