.... In 1901, Forchheimer put forward a classical equation, known as the Forchheimer equation, to make up the deficiency encountered by Darcy's law at high flow rates. He added a non-Darcy term into the Darcy flow equation. The non-Darcy term is the multiplication of the non-Darcy coefficient, fluid density...

... ( 1 − φ − δ p ) v 2 where λ s is the sand production coefficient. Sand deposition constitutive law is assumed to be defined by the following expression [ 17 ] (14) ∂ δ p ∂ t = λ d v c s + ( 1 − η ) ∂ δ s ∂ t where λ d...

... stimulation. The existence of optimum injection rates has been observed for a variety of fluid/mineral systems. 1 - 4 , 7 , 8 , 10 - 14 where K mt is for either reactants or products ( K 1 or K 3 ), depending on the value of the diffusion coefficient. The effective surface reaction rate constant...

... rate used as the network inputs. The methodology presented should prove useful to others faced with characterizing old fields. crossplot porosity porosity log analysis machine learning new technique rbf network neutron porosity lld neutron count rate correlation coefficient exclusion...

... hydraulic fracturing experiment fracture conductivity theoretical study emulsified acid concentration fracture conductivity hci reaction rate equation coefficient conductivity cell SPE 39776 Society of Petroleum Engineers Laboratory and Theoretical Studies for Acid Fracture Stimulation...

... the twodimensional domain integral. p(x1,y1,t ~L'ly{pi~/xi+t-X1 )(yi+l-y1 )+p;+U(x1-Xi)(yi+l-y1 ) Pti+l (xi+t- xl )(y1-yi )+ P;+t.j+t (x1-xi )(y1-Yi)} (15) The domain integral (Eqn 16) obtained for regions 2 and 3 is an analytic expression derived in Appendix A where the coefficients Au, Av, Bu and Bv are infinite...

... coefficient homogeneous reservoir reservoir interpretation spe 39773 drillstem/well testing boundary correlation match point input data upstream oil & gas thickness error drillstem testing fracture conductivity dimensionless wellbore storage coefficient flow rate viscosity wellbore...

... coordinate pressure derivative curve permeability type curve wellbore storage reservoir radial flow period skin factor upstream oil & gas wellbore storage constant complex reservoir reservoir characterization production monitoring production control storage coefficient interporosity flow...

... components except water exist in the oil and gas phases. Oil- and gas-phase densities and fugacities are modeled by a cubic equation of state. The aqueous phase properties are functions of the amount of dissolved C0 2 . C0 2 solubility is computed using a C0 2 fugacity coefficient table that is converted...

... ). In these equations, the coefficients associated with the gradient operator such as the gas viscosity and supercompressibility (z-factor) are strong functions of the dependent variables (p αβ and S αβ ) and hence these equations are highly non-linear. Analytical solutions to these partial differential equations...

... diffusion fluid dynamics flow in porous media coefficient demarcator experimental data drainage concentration drillstem testing diffusion coefficient complex reservoir injection reservoir simulation reservoir characterization drillstem/well testing Introduction Because fractures...

... oil & gas viscosity case 0 net pressure equation sahfrac fracture propagation fracture toughness agreement spe 27711 hydraulic fracturing stress intensity factor propagation model fracture dimension coefficient pressure profile drilling fluid formulation drilling fluids...

... for the future decline curve. Verification of the method was obtained by comparing results with one field case and 16 simulator cases. transient rate future decline curve pseudopressure fetkovich flow coefficient material balance equation coefficient decline curve average reservoir pressure...

... an example on computer generated data. diffusion coefficient fracture transfer rate equation pressure response reservoir upstream oil & gas sarkar wellbore transient well testing coal bed methane matrix complex reservoir coefficient coalbed methane thambynayagam storage well testing...

... coefficient sensitivity coefficient dispersion residual saturation physical dispersion crossflow composition permeability saturation flow in porous media enhanced recovery oil bank calculation injectivity fluid dynamics displacement breakthrough relative permeability united states government...

... are also presented. spe 20137 calculation drillstem testing closure time acid stage gallon 80 conductivity coefficient wellbore perforation hydraulic fracturing upstream oil & gas friction wing length geometry fracture height concentration minifrac fracture phase fracture...

... approximation. specific gravity approximation upstream oil & gas exact value equation pressure range drillstem testing calculation pwf real gas pseudo pressure approximate value gas specific gravity spe 15034 psia rankine coefficient drillstem/well testing mmscf day society...

.... artificial intelligence oil price tax variable drilling activity autocorrelation coefficient rig count spe 12602 forecast hourly earnings variation explanatory variable independent variable investment us government upstream oil & gas machine learning logarithmic transformation producer...