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SIAbbrOil MetricOil FieldAdditional
Timestd = 86400 sd = 86400 shr = 3600 s
LengthmLm = 3.281 ft' = ft = 0.3048 mkm = 103 m
Pipe Diametermd, øm = 39.37 in" = in = 0.0254 mmm = 0.001 m= 0.0393701 in
Temperature°CT°CF = 9/5 T [°C] + 32K = 273 °C
Pressure (absolute)PaPkPa = 103 Pa = 0.145038 psipsi = 6894.76 Pa = 6.89476 kPa

MPa = 1,000 Pa = 103 Pa = 145.038 psi

bar = 105 Pa = 100 kPa = 14.5038 psi

atm = 101,325 Pa = 101.325 kPa = 14.6959 psi

Pressure (gauge)PaPgaugekPag = P[kPa] - 101,325 kPapsig = P[psi] - 14.6959 psi
Rate (oil)m3/sq, Qm3/d = 1.16 · 10-5 m3/sbpd = 0.184 · 10-5 m3/s = 0.159 m3/d
Rate (gas)m3/sqg, Qgm3/d =scf = ft3 =
GORm3/m3Ygm3/m3 =scf/bbl =
Density (solids)kg/m3ρg/cm3 = 103 kg/m3g/cc = g/cm3 = 103 kg/m3
Density (oil)kg/m3ρog/cm3 = 103 kg/m3°API = (141.5/ γo) - 131.5
Specific Gravityγ1 = 103 kg/m31 = g/cm3γ = ρ / ρw
CompressibilityPa-1ckPa-1 = 10-3 Pa-1psi-1 = 0.145 · 10-3 Pa-1 = 0.145 kPa-1

Permeabilitym2kmd = 9.869233×10−7 m2md = 9.869233×10−7 m2D = 9.869233×10−13 m2
Viscositycpμcp = 10-3 Pa · scp = 10-3 Pa · s
Productivitym3/(Pa·s)Jm3/(d·kPa) = bpd/psi = m3/(d·atm) =
Transmissibilitym3/(Pa·s)σ(md·m)/cp =(md·ft)/cp = m3/(d·atm) =
Pressure diffusivitym2/sχ(md·kPa)/cp = (md·psi)/cp = (md·atm)/cp =
Wellbore storagem3/PaCSm3/kPa =

Thermal conductivityW/(m2·K)λW/(m2·C) = W/(m2·F) =
Specific heat capacityJ/KcpkJ/C =kJ/F =