tight oil impact on desalter operations - coqa-inc.org tight oil impact on desalter operations coqa...
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Tight Oil Impact on Desalter Operations
COQA Meeting New Orleans8 November 2012
Dennis Haynes
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Sourcing of Hydrocarbon2
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Variability of Hydrocarbon
Two samples of ‘Eagle Ford’ API 45 and API 57
Variations of tight oil samples Brown, Yellow, Green, and Orange
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Potential Issues Around the Desalter
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Gravity SettlingSettling Factor A basic start to the discussion
Sf = Ability of a droplet to settle through another phase
ρw = Density of water (brine)ρo = Density of the oilμ = Viscosity of the oil
( ρ - ρ ) = w o
μSf
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Gravity Settling6
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Gravity Settling7
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Gravity Settling8
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Gravity Settling 9
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Interfacial Tension
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Water Drop Evaluation
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Water Drop Evaluation
90 degrees C3500V for 8 min at outset
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Droplet Diameter and Mixing Energy
V = Relative velocity of water droplet fallingthrough oil
D = Diameter of water dropletK = ConstantSf = Ability of a droplet to settle through
another phase
Stokes’ Law
V = K D2 Sf
Mix Valve Optimization
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Additive ImpactsDiscussed at AFPM 2012 P&P Session and
3rd Opportunity Crudes Conference
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Amine Impacts
Elevation of Brine effluent pH experienced due to amines observed during operations
Minimization of Wash Water pH Optional technique
Lordo, S. A., Garcia, J. M., Garcia-Swofford, S. “Desalter Acidification Additives and Their Potential Impacts on Crude Units”, NACE Paper 08556
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Bakken Crude Analysis
Test Results
API Gravity @ 60°F 42.1
Karl Fischer Water 0.078 %
Solids ASTM 110 PTB
Acid Number 0.1
Chlorides (Cl) 40 ppm
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Bakken Crude AnalysisElement ppmAluminum (Al) 0.02Barium (Ba) 0.02Calcium (Ca) 0.54Chromium (Cr) 0.01Cobalt (Co) <0Copper (Cu) <0Iron (Fe) 0.7Magnesium (Mg) 0.05Manganese (Mn) 0Molybdenum (Mo) <0.1Nickel (Ni) 0.05Potassium (K) 0.1Sodium (Na) 2.8Strontium (Sr) 0.03Titanium (Ti) <0Vanadium (V) 0.02Zinc (Zn) 1.1
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Bakken Related DepositElement Weight %
C 32.1O 38.4
Na 0.4Al 0.4S 6.1
Cl 0.1K 0.2
Ca 0.5Sr 7.4Ba 14.3
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Bakken Related Deposit
Element Weight %
C 30.3O 16.8Al 0.2S 4.9
Cl 1.1I 1.7
Pb 44.9
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Eagle Ford Crude Analysis
Test Results
API Gravity @ 60°F 58.0
Karl Fischer Water 0.202 %
Solids ASTM 22 PTB
Acid Number <0.1
Chlorides (Cl) 23 ppm
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Eagle Ford Crude AnalysisElement ppmAluminum (Al) 0.33Barium (Ba) 0.21Calcium (Ca) 9.8Chromium (Cr) <0.02Cobalt (Co) <0.1Copper (Cu) 0.07Iron (Fe) 2.3Magnesium (Mg) 0.34Manganese (Mn) <0.02Molybdenum (Mo) <0.6Nickel (Ni) <0.14Potassium (K) 0.5Sodium (Na) 12Strontium (Sr) 1.5Titanium (Ti) <0.4Vanadium (V) <0.05Zinc (Zn) 0.25
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Stability Index Analysis
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Stability Index Analysis
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CSI
Val
ue
CSI
Val
ue
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Stability Index AnalysisCSI Values of Cold Lake / Eagleford BlendsCSI Values of Cold Lake / Eagleford Blends
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CSI
Val
ue
CSI
Val
ue
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Interface and Effluent
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Asphaltene Impact on Brine
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Asphaltene Stabilizer (EF:CL 50:50)
Blank Stabilizer A1x 2x 4x
Stabilizer B1x 2x 4x
Stabilizer C1x 2x 4x
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Key items
Desalter optimization
Crude stability testing
High pH tolerant demulsifier
Asphaltene stabilization Via blending Via stabilizer
Solids removal
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Acknowledgements
Sam Lordo
Keith Gawrys
Paul Lindemuth
Michael Braden
John Garcia
Jeffery Hubbard
Tannon Woodson
Brad Mason
Kailash Sawhney
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