... of energy such as the effects of formation compressibility, residual fluids expansion and aquifer support. It also does not include other sources of gas storage such as connected reservoirs or adsorption in coal/shale. In the past, researchers have introduced modified gas material balance equations...

... beds and deep saline formations), depleted gas condensate reservoirs are particularly interesting. Firstly, because of the high compressibility of gas, these reservoirs have larger storage capacity than oil reservoirs or aquifers. Secondly, the condensate that has dropped out from the gas phase during...

.../STB] C = Performance Coefficient in Fetkovich s Equation, [STB/D/ psia2n] c = Compressibility, [psia-1] CA = Shape Factor ce = Effective Compressibility, [psia-1] cr = Rock Compressibility, [psia-1] d = Exponent Defined by Equation A-6 FE = Flow Efficiency h = Formation Thickness, [ft] hm = Matrix...

... is of significance. The pressure analysis of wells essentially concerns the dynamic relation between the producing rate, the BHP and the average reservoir pressure in the vicinity of the well under consideration. asmari reservoir drillstem testing completion compressibility drillstem/well testing radial...

... diffusivity equation by modification of total gas compressibility. It is shown how the traditional definition of the material balance pseudo-time is modified for dry CBM reservoirs. With the help of these transformations, the traditional (PTA and RTA) type curves can be employed for analysis of production...

... of a field development. upstream oil & gas reservoir simulation reservoir characterization modeling & simulation performance forecasting simulation oil production water injection reservoir model compressibility simulation model porosity oilfield coupling fracture permeability...

..., homogeneous models have much higher cumulative gas recoveries than heterogeneous models, especially in the earlier gas injection/withdrawal cycles. Cumulative gas recovery is mainly dominated by permeability, compressibility, porosity and formation dip angle. Introduction Analyzing or designing a gas...

... modeling & simulation injector pressure transient testing steam chamber flow regime grid block reservoir saturation compressibility sagd steam injection rate steam quality pss method permeability ratio thermal method accuracy enhanced recovery simulator steam-assisted...

... is simple; however in practice, its implementation can be quite complex, as one must account for such variables as external fluid influx (water drive), compressibility of all the fluids and of the rock, hydrocarbon phase changes, etc In order to determine the average reservoir pressure, the well is shut...

... . The value of permeability can be calculated if the value of Ac can be estimated. For example, Ac can be estimated for a hydraulicfracture of known fracture length. dd 0 drillstem/well testing compressibility tight gas well modeling & simulation correlation wf case extreme variation...

... pressure drawdown reservoir simulation production control reservoir pressure response investigation production monitoring fluid property gas property compressibility reservoir geometry formula history match average pressure average reservoir pressure area formula drillstem...

... sand pack pore pressure fluid dynamics solute concentration diffusion equilibrium reservoir characterization compressibility sand matrix flow in porous media gas saturation bubble growth matrix pvt measurement solution gas-oil ratio liquid pressure upstream oil & gas...

.... The fluid is only slightly compressible. The compressibility is constant and small. The effects of gravity and inertial forces in fluid flow are ignored. Radius of investigation, as used in this paper, is the distance that a pressure disturbance (transient) moves into a reservoir at a certain time...

... and permeability are enhanced as sand is removed from the formation, along with any mechanical skin that may have developed; foamy oil compressibility equation dusseault mechanism elastoplastic zone permeability foamy oil behavior enhancement sand production propagation porosity reservoir...

... drainage area reservoir pressure constant rate drillstem/well testing production rate skin factor pressure data compressibility flow rate drillstem testing material balance equation module permeability reservoir permeability rate history upstream oil & gas reservoir surveillance...

... with the external world (for example connected with lakes and rives). The equations are written taking into account the effective compressibility of matrix and fractures. Stress-sensitive properties such as fracture porosity, fracture permeability, partitioning coefficient and exponent for shape of relative...

... predicted by transient gas flow equations based on Darcy's law. permeability calc different value skin factor compressibility drillstem testing pressure transient testing exhibition case 1 initial permeability pressure-dependent permeability drillstem/well testing tight gas reservoir...

... . thermal method vertical distance accuracy pressure transient testing pressure transient analysis grid block density steam chamber reservoir saturation steam quality pss method compressibility flow regime drillstem testing estimation injection time producer injector sagd steam-assisted...

... Abstract Analytical solutions in well-test analysis are oriented towards fluids with a constant viscosity and compressibility in a porous medium with a constant porosity. To use these solutions in gas-flow situations, one needs to apply the pseudo-pressure and pseudo-time transformations. Thus...

... developed a chart for estimating productivity-index ratio, based on assumptions including pseudo steady-state flow, square drainage area, compressible fluid flow, and a fracture propped throughout the entire productive interval. Tannich and Nierode4 developed a method similar to the McGuire-Sikora charts...