smart water for eor by membranes standup re… · smart water production options. nanofiltration...
TRANSCRIPT
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Smart Water for EOR by Membranes
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PhD May 2015 – 2018 Supervisors: Prof. Torleiv Bilstad and Dr. Skule Strand
Myself
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Membrane is a selective barrier separating ions
Feed SW Retentate
Permeate
Permeate
Cross Flow Membrane Separation
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Low TDS Water + Chemicals
Smart Water Production Options
Nanofiltration membrane
Seawater as feed and (retentate) stream from membrane
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Why NF for Smart Water
3000 NO
K
6500 NO
K
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SO42- and Mg 2+ spiking effects on Cl⁻ and Na+ membrane separation
Cl- rejection decreased Na+ rejection decreased
Ion spiking of feed water
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SO42- and PO4
2- spiking effects on Cl⁻ and Na+ separation
Very high solubility in seawater
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Filtered SeawaterNF
RONF Permeate
NF Reject
RO Feed
RO Reject
RO Permeate
Smart Water
TDS = 10 000 – 28 000 ppm
Element ppmNa 10800Cl 19500Ca 400
Mg 1200SO4 2500TDS = 34400
Element ppmNa 9300Cl 16700Ca 350Mg 1000SO4 2400TDS = 29750
TDS < 500 ppm
Combination of NF and RO membrane for smart water production
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Produced Water for Smart Water
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Marathon oil, 1990, North SeaOffshore SR 90 membrane plant
Barium Scale in Oil Production
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Ion rejection by NANO-BW-4040, NANO-SW-2540 and NF-270 (9 bar)
Results
0
10
20
30
40
50
60
70
80
90
100
Na Cl Ca Mg Ba
REJE
CTIO
N, %
LNANO-BW-4040 - 1:1.5 dilution NANO-SW-2540 - 1:3.5 dilution
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Nutshell-Filter
Coalescer NF
NF/RO
Permeate
Retentate
Permeate
Retentate
Seawater
Diluted Brine for Re-
Injection
Re-use or Disposal
Produced Water Flow
Undesired increase of Na and Cl
Re-use or Disposal
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Conclusions
No Excess Chemicals
Sulphate Substitution by Phosphate?
Energy Efficient
Produced Water Reuse
Fresh Water Saving
Sustainability