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| Symbol | Dimension | SI | Oil Metric | Oil Field | Additional |
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Time | t | T | s | d = 86,400 s | d = 86,400 s | hr = 3,600 s |
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Length | L | L | m | m = 3.281 ft | ' = ft = 0.3048 m | km = 103 m, cm = 10-2 m, mm = 10-3 m |
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Area | A | L2 | m2 | m2 | ac = 4,047 m2 | ha = 10,000 m2 = 2.471 ac |
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Volume | V | L3 | m3 | m3 = 6.289811 bbl | bbl = 0.158987 m3 | scf = ft3 = ??? |
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Mass/Wieght | M, m | M | kg | kg | lb = 0.45359237 kg |
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Pipe Diameter | d, ø | L | m | m = 39.37 in | " = in = 0.0254 m | mm = 0.001 m= 0.0393701 in
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Temperature | T | Θ | °C | °C | °F = 9/5 T [°C] + 32 | K = 273 °C
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Pressure (absolute) | P | M L-1 T-2 | Pa | kPa = 103 Pa = 0.145038 psi MPa = 103 Pa = 145.038 psi GPa = 106 Pa = 145,038 psi | psi = 6894.76 Pa = 6.89476 kPa
| bar = 105 Pa = 100 kPa = 14.5038 psi atm = 101,325 Pa = 101.325 kPa = 14.6959 psi |
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Pressure (gauge) | Pgauge | M L-1 T-2
| Pa
| kPa(g) = kPa(abs) - 101,325 kPa | psi(g) = psi(abs) - 14.6959 psi |
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Rate (oil) | q, Q | L3 T-1 | m3/s | m3/d = 1.16 · 10-5 m3/s
| bpd = 0.184 · 10-5 m3/s = 0.159 m3/d
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Rate (gas) | qg, Qg | L3 T-1 | m3/s
| m3/d = ??? | scf/d = ft3/d = ??? |
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GOR | Yg | – | m3/m3 | m3/m3 = ??? | scf/bbl = ??? |
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Density (solids) | ρ | M L-3 | kg/m3 | g/cm3 = 103 kg/m3 | g/cc = g/cm3 = 103 kg/m3 |
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Density (oil) | ρo | M L-3 | kg/m3 | g/cm3 = 103 kg/m3 | °API = (141.5/ γo) - 131.5 |
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Specific Gravity | γ | – | – | 1 = 103 kg/m3 | 1 = g/cm3 | γ = ρ / ρw |
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Compressibility | c | L T2 M-1 | Pa-1 | kPa-1 = 10-3 Pa-1 | psi-1 = 0.145 · 10-3 Pa-1 = 0.145 kPa-1
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Permeability | k | L2 | m2 | md = 9.869233×10−7 m2 | md = 9.869233×10−7 m2 | D = 9.869233×10−13 m2 |
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Viscosity | μ | M L-1 T-1 | cp | cp = 10-3 Pa · s | cp = 10-3 Pa · s |
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Productivity | J | L4 T M-1 | m3/(Pa·s) | m3/(d·kPa) = ??? | bpd/psi = ??? | m3/(d·atm) = ??? |
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Transmissibility | σ | L4 T M-1 | m3/(Pa·s) | (md·m)/cp = ??? | (md·ft)/cp = ??? | m3/(d·atm) =??? |
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Pressure diffusivity | χ | L2 T-1 | m2/s | (md·kPa)/cp = ??? | (md·psi)/cp = ??? | (md·atm)/cp = ??? |
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Wellbore storage | WBS, CS | L4 T2 M-1 | m3/Pa | m3/kPa = ??? | bbl/psi = ??? |
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Thermal conductivity | λ | M L T-3 Θ-1 | W/(m·K) | W/(m·C) = ??? | BTU/(hr⋅ft⋅°F) = ??? |
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Specific heat capacity | cp | M L2 T-2 Θ-1 | J/K | kJ/C = ??? | kJ/F = ??? |
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