... size spe 147239 reservoir modeling & simulation effective wellbore radius polymer viscosity shear rate permeability Introduction Polymers are used for mobility control in polymer flooding, surfactant-polymer flooding and alkali-surfactant-polymer flooding methods of enhanced oil...

... near-wellbore skin, or for treatments that seek only modest increases in effective wellbore radius. Thus, large amounts of hydraulic horsepower, fluid tankage, a frac blender, proppant bins, etc. are not required. Eliminating the need for such equipment, by the use of pre-slurried proppants, or Liquid...

... blocks, effective wellbore radius concept, pseudo-skin functions and fracture skin are discussed. An improvement to Gringarten's dimensionless productivity solution for infinite-conductivity vertical fractures in rectangular closed reservoirs is also presented. pseudosteady-state analysis infinite...

... fracturing materials upstream oil & gas permeability formation conductivity proppant concentration effective wellbore radius wellbore radius efficiency fracture length optimum fracture fetkovich proppant schedule fracture hydraulic fracturing proppant fracture conductivity morale norman...

..., such that a common effective wellbore radius can be used with zero skin. One can then ignore skin effects for the time being. From Eq. A-29, or from general properties, one can assume that the Laplace transform for dimensionless pressure can be expressed in the form (B-1) p ¯ D ( r D , z D...

... two flow periods only: bilinear flow and pseudo-radial flow. It is demonstrated that for these fracture conductivities the effective wellbore radius is given by r w ′ = 0.28 ( k f b f /k ) ; that means that there is a maximum value of the effective wellbore radius achieved...

... transient technique. 1 Drillstem Testing intercept BPM drillstem/well testing psig effective wellbore radius fracture pressure straight line Injection Equipment wellhead pressure fractured geothermal reservoir transient analysis injection flowrate permeability Upstream Oil & Gas...

..., the results did not agree. The correlation used in ref. 4, based on an effective wellbore radius, was also found to be poor for tD less than 100. A new correlation was found for tD less than unity. In order to compute results, a numerical Laplace transform inversion method was used. The characteristics...