Particle Characterization: Petroleum Applications · *C. Dalmazzone, C. Noïk, «Development of New...
Transcript of Particle Characterization: Petroleum Applications · *C. Dalmazzone, C. Noïk, «Development of New...
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Particle Characterization:Petroleum Applications
Mark Bumiller
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Range of Applications
Exploration Processing RefiningCompletion
Drilling fluid Oil in water emulsion Catalysts Proppants Solid particles
Techniques used: laser diffraction, dynamic image analysis, Acoustic spectroscopy, surface area analysis
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Exploration: Drilling Rig
1. Mud tanks2. Shale shaker3. Mud suction line4. Mud pump16. Drill pipe20. Rotary table26. Drill bit
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Drilling Fluid (Mud)
Remove cuttings from well Suspend and release cuttings Control formation pressures Seal permeable formations Maintain wellbore stability Minimizing formation damage Cool, lubricate, and support the bit and drilling assembly Facilitate cementing and completion
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Types of Fluids
Water-based mud (WBM)Water, then clays and other chemicalsMost common is bentoniteOther chemicals for viscosity control, shale stability, enhance drilling rate, cooling, etc.
Oil-based mud (OBM)Base fluid is a petroleum product such as diesel fuel
Synthetic-based fluid (SBM)Base fluid is a synthetic oil
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Particle Size of Drilling Fluids
Standard methods include sieves & sedimentationReport residue > 75 µm & < 6 µmDiffraction can report this, + distribution information
D10, d50, d90Quicker, more reproducible
Recommended practices for barite:RI: 1.64, 0.1 in 1.33 (water)Dispersant: 1 g sodium pyrophosphate in 1000 cm3 waterMix paste of barite powder, dispersantAdd to system, %T not < 90-85%Ultrasound for 60 secMeasure
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Particle Size of Drilling FluidComposition: Bentonite 29 g/LXantham gum 2.9 g/LP.A.C. (polymer additive) 2.9 g/LBarite 15 g/LNaOH 0.7 g/L
Procedure:RI for barite = 1.64, 0.15 g of barite added to a beaker.Dispersant* added to barite drop wise until smooth paste was created.*Dispersant solution: 1 g of sodium pyrophosphate/1000 cm3 of solution.Sampler was filled with DI water.Barite sample added the sampler using clean spatula to desired concentration:
Transmission = 80-90%Sampler circulation setting = 5Ultrasound at level 7 applied to sample for 60 secWait 30 sec after turning off the ultrasoundPerform particle size measurementRepeat these steps for a total of 3 sub-samples from the original paste
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Particle Size of Drilling Fluid
LA-950
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Particle Size of Drilling Fluid
LA-930
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Particle Size of Drilling Fluid
LA-300Smaller,portable,better forfield work55lb/25 kg
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Hydraulic Fracturing Proppant
20/40 sand
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Proppants
Keep fractures openImproves permeabilityOften sand , specified by sieve sizes
12/20, 16/30, 20/40, 40/70 (95% passes between these sieve sizes)
Higher tech proppants, more expensive, higher performance
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Ceramic Proppant Patent
“The resulting pellets have a sphericity of about 0.8-0.9,as determined using the Krumbein and Sloss chart.”
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Proppant Spec Sheet*
*
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Proppants: CAMSIZER
Size and shape from 30 µm – 30 mm
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CAMSIZER Proppant Data*
API crush test of proppants:Mechanical forces compresses proppant in cell to desired PPSD is measured after releaseCrush resistance = wt% of proppant passing smallest sieve of originally specified PSDOnly one sieve tray required, entire PSD changes during testMeasuring entire PSD reveals more information
*Stephens et. al., Statistical Study of the Crush Resistance Measurement for Ceramic Proppants2006 Annual SPE Meeting
“An optical size analyzer can extract more information than physical sieve analysis about the behavior of proppants under stress while significantly reducing analysis time.”
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CAMSIZER Proppant Data*
*Stephens et. al., Statistical Study of the Crush Resistance Measurement for Ceramic Proppants2006 Annual SPE Meeting
PSD before and after crush
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CAMSIZER Proppant Data*50th percentile before and after crush
*Stephens et. al., Statistical Study of the Crush Resistance Measurement for Ceramic Proppants2006 Annual SPE Meeting
10th percentile before and after crush
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Production Fluid SeparationGas
Oil
Water
Solids(particles)
Oil/water separator
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Production Fluid Separation
Want to separate all phasesNeed to measure phase separation
Improve by adding surfactantsNeed to measure ppm oil in water
Required to measure if pumping water into ocean (off shore rigs)Oil is valuable, separate as much as possible
Possible to differentiate oil droplets from particles?
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Emulsion Stability
Want to promote phase separationRecover oil, discharge waterMay want to add water to oil to reduce viscosity, easier to transport (orimulsion)
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Emulsion Stability: DT1201
Measure particle size & zeta potential w/no dilutionZeta potential (CVI) predicts dispersion stability
Colloid vibration current (CVC) zeta potential
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Bitumen Emulsion Stability*
Bitumen diluted 1:1 w/tolueneDiluted w/D2O 2-30 wt %Homogenize 125 watt, 30,000 RPM
DT-1200 w/homogenizer*Magual, A., Horvath-Szabo G., Masliyah, J.H. “Acoustic and electroacoustic spectroscopy of water-in-diluted bitumen emulsions”, Langmuir, 21, 8649-8657 (2005)
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Bitumen Emulsion Stability*
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Crude Oil Demulsification
Problem: Break the crude oil emulsion– In the shortest time– With less additive– Leave an unpolluted water phase
Solution:– Find the optimal additive (cost, efficiency)– Need to be tested on each oil batch
Identify the best surfactant for demulsification
General Turbiscan presentation
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*C. Dalmazzone, C. Noïk, «Development of New «green» Demulsifiers for Oil Production », SPE65041
Study from French Institue of Petroleum (IFP)*Turbiscan test
Qualitative & Quantitative studySelection of the best additiveOptimization of the additive concentration Criteria:
– width of T peak = height of separated water– height of T peak = Limpidity of separated water
General Turbiscan presentation
Crude Oil Demulsification
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Limpidity (clarity)
Height
water oil
C. Dalmazzone, C. Noïk, «Development of New «green» Demulsifiers for Oil Production », SPE65041
Crude Oil Demulsification
General Turbiscan presentation
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« Separation rate » => %T = f(time)
300 ppm is the best concentrationC. Dalmazzone, C. Noïk, «Development of New «green» Demulsifiers for Oil Production », SPE65041
Crude Oil Demulsification
General Turbiscan presentation
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Orimulsion: EmulsificationBitumen: sticky, tar-like form of petroleum so thick & heavy must be heated/diluted before it will flow World's largest deposit in Orinoco Belt, VenezuelaOrimulsion made by mixing bitumen with ~ 30% fresh water + small amount of surfactantThe result behaves similarly to fuel oilUsed as commercial boiler fuelD50 ~ 14 µm
LA-950 resultOrimulsion droplets
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Oil in Water after Separation
Flow chambers50um – 1mm 2mm-6 mm
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Droplets vs. Particles
Distinguishing between two would be easy if they looked like this
Oil droplets Iron sulfide particles
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Droplets vs. Particles
Agglomerated droplets Sand
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Pattern Matching Algorithm
User selects examples of droplets, iron sulfide, sand particlesSoftware looks at many size/shape valuesChooses how to discriminateBins each particle by type, countsCan calculate ppm oil
timepp
m
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Refining: Catalysts
Size, shape and specific surface area (SSA) affect catalyst performanceMeasure size using laser diffractionMeasure size/shape by CAMSIZERMeasure SSA using BET: SA-9600
Flowing gas BET methodLow price,operating costs, maintenanceEasy to use, fastest measurement timeNo vacuum system requiredSingle or multi-pointUp to three samples simultaneously
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Catalysts Size/Shape by CAMSIZER
Spherical catalysts Easy, no special effort
Cylindrical catalystsLength, width
Bended extrudatesUse other parameters 2
min2
max )()( cFelength xxx −=
mincstretch x
Ax =
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Catalysts Size/Shape by CAMSIZER
Tri & quadralobePossible to distinguish between different diamtetersShorter green distribution = lengthTaller maroon distribution= width
Quadralobe catalysts
Trilobe catalysts
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Summary
Particle size, shape, surface area, other properties important from exploration to refiningKey applications:
Drilling fluidProppantsOil/water/solids separationCatalysts
Talk to HORIBA about all these requirements