• SNF conceptual study about BoD, SoR for TLP and FSO, polymer properties, process, operation, logistics options, costs, ... • Lab studies of polymer AN125SH and FP5115 into field reservoir water, sea water and mix of both waters • SNF Answer: ‘The temperature being 86°C , the Flopaam 3630S (copolymer of acrylamide and acrylate) will not be stable . So we propose to use a polymer containing some sulfonated moieties , stable up to 100 °C , and also with less tendency to hydrolyzation . Flopaam AN125SH is a copolymer of acrylamide and ATBS (sulfonate monomer) , Flopaam 5115 is a terpolymer of acrylamide ATBSacrylate (the ATBS will pr event further hydrolysis or precipitation) . Both polymers should be tested on long term stability to select the best one in term of economic Technical ratio . AN125 will be the best in term of long term stability , but its cost is slightly higher.’
Trang 1Enhanced Oil Recovery
Polymer Flooding
Trang 2October 15 | Page 2
SNF Conceptual Study
logistics options, costs,
waters
• SNF Answer: ‘The temperature being 86°C , the Flopaam 3630S (copolymer of acrylamide and acrylate) will not be stable So we propose to use a polymer
containing some sulfonated moieties , stable up to 100 °C , and also with less tendency to hydrolyzation
Flopaam AN125SH is a copolymer of acrylamide and ATBS (sulfonate monomer) , Flopaam 5115 is a terpolymer of acrylamide /ATBS/acrylate (the ATBS will pr event further hydrolysis or precipitation) Both polymers should be tested on long term stability to select the best one in term of economic/ Technical ratio AN125 will be the best in term of long term stability , but its cost is slightly higher.’
OCTL test SNF conceptual study
Trang 3October 15 | Page 3
SNF study - Polymer Injection Facilities
Trang 4Polymer Flooding simulation
0 10 20 30 40 50 60 70 80 90
Polymer Concentration (ppm)
Polymer Viscosity
Csalt 6000 ppm Csalt 20000 ppm Csalt 35000 ppm
EOR Mechanism: Polymer augmented increases
water viscosity, improve mobility ratio and
sweep efficiency.
PLYMAX, PLYROCK, WPOLYMER,
polymer solution viscosity
PLYVISC
polymer water viscosity
concentration multiplier
lb/stb [-]
Csalt 7.01 lb/stb (20000 ppm) from SALTNODE
0.0 1.0
0.1753 5.0
0.3505 10.0
0.7010 20.0 /
Polymer concentration of 1000 ppm as SNF suggestion
water cut about 40%)
Trang 5Chemical Injection simulation – 2D model
Polymer assumption:
Surfactant Flooding assumption:
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Fractional Flow
1 Base case 2 Polymer 500 ppm
3 Polymer 1000 ppm 4 Surfactant1
5 Surfactant2 6 ASP
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Relative Permeability
Kro Krw fw
Trang 6Chemical Injection simulation – 2D model
Polymer Flooding
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
FOE
FOE PF000 FOE PF001 FOE SF000 FOE SP000
0
10
20
30
40
FOPR
FOPR PF000 FOPR PF001 FOPR SF000 FOPR SP000
Water Polymer
Surfactant Polymer +Surfactant
Trang 7Polymer Flooding simulation – 2D model
Profile of 2D model:
5
10
15
20
2D Polymer Flooding
FOPR PLYFLOOD005 FOPR PLYFLOOD003 FOPR PLYFLOOD004
1500 2500 3500 4500 5500
WBHP
Trang 8Polymer Flooding simulation – 2D model
0
10
20
30
40
2D Polymer Flooding
FOPR PF000 FOPR PF001 FOPR PF002
FOPR PF003 FOPR PF004 FOPR PF005
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
FOE
FOE PF000 FOE PF001 FOE PF002 FOE PF003 FOE PF004 FOE PF005
Trang 9Polymer Flooding simulation – Full Field model
Case name Case description
UR (mmstb)
% Variance RF %
Profile FFM:
Water Injectors (especially in the oil leg) => Need more injectors or increase injection pressure
20K
40K
60K
80K
100K
120K
0 50MM 100MM 150MM 200MM 250MM 300MM 350MM
Polymer Flooding
Ref case - Water Flooding
ASP Flooding from 2022
Polymer flooding
FOPR PH30_P136F4 FOPT PH30_P136F4 FOPR PH30_P136F10
FOPT PH30_P136F10 FOPR PH30_P136N FOPT PH30_P136N
Pv Injected
0 0.1 0.2 0.3 0.4
RF vs PV Injected
FOE PH30_P136N FOE PH30_P136F4 FOE PH30_P136F10
Start Polymer injection
Trang 10October 15 | Page 10
Way forward
• Cost and Economics evaluation
• Core experiment program for polymer flooding
• Pilot test
• Full field application