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Fracture Properties Needed
Fracture porosity & permeabilityare both a function of Fracture Width (e) & Fracture Spacing (D)
Fracture Porosity Magnitude
Difficult to CalculateFracture Porosity is Difficult to Calculate and Even More Difficult to Interpret
While Fracture Porosity is Small in MagnitudeIt is very effective porosity A possible large volume per well due to large drainage area and reservoir thickness An assumed high recovery factor
Fracture System Volume as a Function of Fracture Porosity & DrainageNelson (1985)
Fracture Porosity & Scale2 ft Nelson (1985)
Depth & Depletion Corrections Than in Matrix PorosityAre Much More Severe in Fracture Porosity Than in Matrix Porosity
Fracture & Matrix PorosityCompressibility
Fracture & Matrix Permeability Tr Ss from Daw & Others (1974)Compressibility Tr Ss from Daw & Others (1974)
Fracture Porosity CalculatorNelson (1985)
Fracture Porosity Determinations
Fracture Porosity from Core Analysis
Fracture PermeabilityFracture Porosity vs. Fracture Permeability Nelson (1985)
Fracture Porosity/ Permeability RelationshipK. North Sea Chalk Valhall Field Fracture Porosity/ Permeability Relationship Nelson (1985)
Fracture Porosity from Outcrop Fracture IntensitiesNelson (1985) Assumes Fracture Width for Ls at 10,000 ft from Lab Measurements
Sometimes Fracture Porosity & Matrix Porosity are Related
Calcite Filled Vessicle Trains Surrounding Fractures in Tert. BasaltWest Rozel, Great Salt Lake, Utah
Matrix Saturation Around Fractures Calcite fill in Outcropin Tert. Basalt Calcite fill in Outcrop West Rozel, Great Salt Lake, Utah
Calcite Along Vessicle Trains AlongFractures in Basalt West Rozel, Great Salt Lake, Utah
Empirical Factors Leading to a Good Fractured Reservoir Early recognition of fractures High fracture intensity & good connections Good interaction between.
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