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A FEASIBILITY STUDY FOR PIPELINE TRANSPORTATION OF CO 2 AND ITS STORAGE IN A SEMI-DEPLETED GAS RESERVOIR ÖZGÜR GÜNDOĞAN Supported by Turkish Petroleum.

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Presentation on theme: "A FEASIBILITY STUDY FOR PIPELINE TRANSPORTATION OF CO 2 AND ITS STORAGE IN A SEMI-DEPLETED GAS RESERVOIR ÖZGÜR GÜNDOĞAN Supported by Turkish Petroleum."— Presentation transcript:

1 A FEASIBILITY STUDY FOR PIPELINE TRANSPORTATION OF CO 2 AND ITS STORAGE IN A SEMI-DEPLETED GAS RESERVOIR ÖZGÜR GÜNDOĞAN Supported by Turkish Petroleum Corporation UNIVERSITY OF ROME "LA SAPIENZA" FACULTY OF ENGINEERING Department of Chemical Engineering, Raw Materials and Metallurgy

2 THE RESERVOIR Offshore Marmara Sea Onstream since 1997 OGIP:5.1MMSm 3 Natural depletion reservoir Anticlinal structure Reservoir rock: bioclastic limestone Reservoir top: 1150m :20%, k:50mD Pi:2075psia(143bar), T:68°C Kuzey Marmara

3 STORAGE OF NATURAL GAS TRASPORTATION GAS PROCESS & COMPRESSION INJECTION & WITHDRAWAL INJECTION & WITHDRAWAL

4 CO 2 INJECTION COMPRESSION TRANSPORTATION SOURCECAPTURE CAPTURE - TRANSPORTATION – STORAGE OF CO 2

5 CAPTURE Source of CO 2 NGCC (Natural Gas Combined Cycle) plant nominal capacity: 468 MW real capacity: 85% of nominal capacity emission factor: 450 kg CO 2 /MWh concentration of CO 2 in flue gas: 4% volume working hours :8000 h/year

6 3530 tons of CO 2 per day post-combustion capture chemical absorption monoethanolamine ( MEA) at 30% pureness of CO 2 : 99% recovery rate: 90% CAPTURE Fluor Daniel Econamine FG process 2R-NH 2 + CO 2 R-NH 3 + + R-NH-COO - R=HO-CH 2 CH 2 Absorber: Stripper: R-NH-COO - + R-NH 3 + + (calore) CO 2 + 2R-NH 2

7 COMPRESSIONE Potenza (MW) P in =3bar (43,5psia) P out =141bar (2050psia) T in =38°C Q=1,800 MSm 3 /d E=80% Number of stages 16 MW

8 CONDITION OF CO 2 Operation range Density of CO 2 Phase diagramme of CO 2

9 TRANSPORTATION Performance requirements nominal capacity of 2,0 MSm 3 /day maximum inlet pressure: 2200 psia (152 bar) inlet temperature: 35°C maximum soil temperature: 24°C Onshore Offshore 30000m 2500m 63m

10 TRANSPORTATION Tubing curve for 6 Sensitivity analysis Tubing curve for 8 Tubing curve for 10

11 TRANSPORTATION 7,8mm Pipe thickness Parameters 100% CO 2 The pipeline has cooled to 6,2°C, which is the minimum temperature of the soil at 1m of depth. Maximum inlet pressure is 2200 psia (152 bar) The pipe can be stressed to 72% of specified minimum yield strength Internal corrosion: none

12 STORAGE Reservoir model Tank model zero-dimensional uniform porosity uniform saturation constant temperature uniform pressure Material balance equation

13 STORAGE Model calibration History matching Tank pressure and cumulative gas production

14 STORAGE Model calibration History matching - Sensitivity Standard deviation against gas in place

15 STORAGE History matching – production prediction Model calibration

16 STORAGE Cushion and working gas P cushion =1200 psia (82,7 bar) P max =2014,7 psia (139 bar) P i =2075 psia (143 bar) = 4,95*10 9 Sm 3 Maximum capacity = Cushion gas = = 2,86*10 9 Sm 3 Working gas = Max. capacity– Cushion gas = 4,95*10 9 – 2,85*10 9 =2,1*10 9 Sm 3

17 STORAGE Well capacity IPR VLP 5 Offshore wells: maximum capacity:0,54 – 0,86SMm 3 6 Onshore extended reach wells: maximum capacity:1,3 – 1,6SMm 3 IPR MODEL: Well model: VLP/IPR intersection

18 STORAGE Simulation Simulation has four phases: 1.depletion phase 2.storage of CO 2 3.repressurization 4.storage cycles

19 STORAGE Depletion phase

20 STORAGE Depletion phase Period: 01/06/2005 – 29/11/2008 Final pressure: 755psia Cumulative factor: 3375 MSm 3 Recovery factor: 66%

21 STORAGE Storage of CO 2

22 STORAGE Storage of CO 2 Tank pressure and cumulative gas injection with storage of 2349 MSm 3 of CO 2

23 STORAGE Repressurization

24 STORAGE Storage cycles

25 ECONOMICAL ASSESSMENT Costs The cost of the project can be divided in three classes: Capital costs (Capex) Operation and maintenance costs (Opex) Energy costs. CAPEX () OPEX () COSTUNITTOTALCOST Pipeline Onshore125,0030.000,003.750.000,00 50.000 Pipeline Offshore375,002.563,00961.125,00 Capture Process135.000.000,001,00135.000.000,0014.000.000 Compressione11.500.000,001,0011.500.000,00800.000 Storage 250.000 Total 151.211.125,0015.100.000

26 ECONOMICAL ASSESSMENT Energy costs CaptureCompressionTotal ()/t CO2 /t CO2seq 1° year12.352.5002.819.58515.172.08512,44 14,46 2° year12.352.5003.095.37515.447.87512,66 14,72 3° year12.352.5003.405.87515.758.37512,92 15,02 4° year7.178.6252.143.1199.321.74413,15 15,29

27 ECONOMICAL ASSESSMENT Costs CapexOpexEnergyTotal ()/t CO2 /t CO2seq. 1° year47.910.86215.100.00015.172.08578.182.94764,0874,52 2° year47.910.86215.100.00015.447.87578.458.73764,3174,78 3° year47.910.86215.100.00015.758.37578.769.23764,5675,08 4° year (7 months )27.948.0038.800.0009.321.74446.069.74764,9875,56 Total171.680.58954.100.00055.700.079281.480.66864,4374,91

28 ECONOMICAL ASSESSMENT CAPEX (/CO 2seq ) OPEX (/CO 2seq ) ENERGY (/CO 2seq ) TOTAL (/CO 2seq )% CAPTURE40,8513,3511,7765,97 88,06 TRANSPORTATION4,840,813,058,70 11,62 STORAGE-0,24- 0,32 TOTAL45,6914,4014,8274,92 100 % 60,9919,2219,79100 Costs

29 ECONOMICAL ASSESSMENT Revenue Gas production (MSm3) Value () 30.11.200541741.700.000 30.11.200656656.600.000 30.11.200733933.900.000 30.11.200819719.700.000 Total1.519151.900.000 Capex- V. gasOpexEnergyTotal ()/t CO2 /t CO2seq 1° Anno-285.56115.100.00015.172.08529.986.52424,5828,58 2° Anno-285.56115.100.00015.447.87530.262.31424,8128,84 3° Anno-285.56115.100.00015.758.37530.572.81425,0629,14 4° Anno (7 mesi)-166.5688.808.0009.321.74417.963.17625,3429,46 Total-1.023.25154.108.00055.700.079108.784.82824,9028,95

30 ECONOMICAL ASSESSMENT /t CO 2 seq Credits (= 20 / tCO 2 ) : Constant

31 ECONOMICAL ASSESSMENT /t CO 2 seq Value of cushion gas (0,10 ): Constant

32 CONCLUSIONS Sequestration of CO 2 in a semi-depleted gas reservoir is a valid option. The substitution of cushion gas with CO 2 is economically valid. The economical analysis showed that the actual value of emission credits, 20 per ton of CO 2, is insufficient to offset the investments. Costly to capture CO 2 Mixing between natural gas and CO 2 ? The physical and chemical interactions between CO 2, natural gas, water, reservoir and caprock? Long run fate of CO 2 ? Future of capture plant?

33 THANK YOU FOR YOUR ATTENTION!


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