Frontier science and challenges on offshore carbon storage

Highlights

● The main direct seal up carbon options and challenges are reviewed.

● Ocean-based CO₂ replacement for CH₄/oil exploitation is presented.

● Scale-advantage of offshore CCS hub is discussed.

Abstract

Carbon capture and storage (CCS) technology is an imperative, strategic, and constitutive method to considerably reduce anthropogenic CO₂ emissions and alleviate climate change issues. The ocean is the largest active carbon bank and an essential energy source on the Earth’s surface. Compared to oceanic nature-based carbon dioxide removal (CDR), carbon capture from point sources with ocean storage is more appropriate for solving short-term climate change problems. This review focuses on the recent state-of-the-art developments in offshore carbon storage. It first discusses the current status and development prospects of CCS, associated with the challenges and uncertainties of oceanic nature-based CDR. The second section outlines the mechanisms, sites, advantages, and ecologic hazards of direct offshore CO₂ injection. The third section emphasizes the mechanisms, schemes, influencing factors, and recovery efficiency of ocean-based CO₂-CH₄ replacement and CO₂-enhanced oil recovery are reviewed. In addition, this review discusses the economic aspects of offshore CCS and the preponderance of offshore CCS hubs. Finally, the upsides, limitations, and prospects for further investigation of offshore CO₂ storage are presented.

Key words： Offshore carbon storage; Direct CO₂ injection; CO₂-CH₄ replacement; CO₂-EOR; CCS hubs; CO₂ transport

Acknowledgements

We would like to express our gratitude for the financial support from the Science and Technology Commission of Shanghai Municipality (No. 21DZ1206200) and the Shanghai Agriculture Science and Technology Program (No. 2022-02-08-00-12-F01176). Zhu and Li would also like to thank the financial support from the National Natural Science Foundation of China (Nos. 52006135 and 72140008), respectively.

References

1 Abdurrahman M, Hidayat F, Husna U Z, Arsad A. (2021). Determination of optimum CO₂ water alternating gas (CO₂-WAG) ratio in Sumatera Light Oilfield. Materials Today: Proceedings, 39: 970–974

2 Adams E E, Caldeira K. (2008). Ocean storage of CO₂. Elements (Quebec), 4(5): 319–324

3 Alcalde J, Heinemann N, James A, Bond C E, Ghanbari S, Mackay E J, Haszeldine R S, Faulkner D R, Worden R H, Allen M J. (2021). A criteria-driven approach to the CO₂ storage site selection of East Mey for the acorn project in the North Sea. Marine and Petroleum Geology, 133: 105309

4 Alcalde J, Heinemann N, Mabon L, Worden R H, De Coninck H, Robertson H, Maver M, Ghanbari S, Swennenhuis F, Mann I. . (2019). Acorn: developing full-chain industrial carbon capture and storage in a resource- and infrastructure-rich hydrocarbon province. Journal of Cleaner Production, 233: 963–971

5 Austvik T, Løken K P. (1992). Deposition of CO₂ on the seabed in the form of hydrates. Energy Conversion and Management, 33(5–8): 659–666

6 Bhatia S K, Bhatia R K, Jeon J M, Kumar G, Yang Y H. (2019). Carbon dioxide capture and bioenergy production using biological system: a review. Renewable & Sustainable Energy Reviews, 110: 143–158

7 Bigalke N K, Rehder G, Gust G. (2008). Experimental investigation of the rising behavior of CO₂ droplets in seawater under hydrate-forming conditions. Environmental Science & Technology, 42(14): 5241–5246

8 Boswell R, Myshakin E, Moridis G, Konno Y, Collett T S, Reagan M, Ajayi T, Seol Y. (2019). India national gas hydrate program expedition 02 summary of scientific results: numerical simulation of reservoir response to depressurization. Marine and Petroleum Geology, 108: 154–166

9 DoctorRPalmer AColemanDDavisonJHendriksC KaarstadOOzaki MAustellM (2005) IPCC Special Report on Carbon Dioxide Capture and Storage. Cambridge: Cambridge University Press, 186–187

10 Brewer P G, Friederich G, Peltzer E T, Orr F M Jr.. (1999). Direct experiments on the ocean disposal of fossil fuel CO₂. Science, 284(5416): 943–945

11 Brewer P G, Peltzer E T, Friederich G, Rehder G. (2002). Experimental determination of the fate of rising CO₂ droplets in seawater. Environmental Science & Technology, 36(24): 5441–5446

12 Buesseler K O, Lamborg C H, Boyd P W, Lam P J, Trull T W, Bidigare R R, Bishop J K B, Casciotti K L, Dehairs F, Elskens M. . (2007). Revisiting carbon flux through the ocean’s twilight zone. Science, 316(5824): 567–570

13 Camps A P. (2008). Hydrate formation in near surface ocean sediments. Ph.D. Ann Arbor: University of Leicester (United Kingdom), 294

14 Castellani B, Gambelli A M, Nicolini A, Rossi F. (2019). Energy and environmental analysis of membrane-based CH₄-CO₂ replacement processes in natural gas hydrates. Energies, 12(5): 850

15 Cavanagh A, Ringrose P. (2014). Improving oil recovery and enabling CCS: a comparison of offshore gas-recycling in Europe to CCUS in North America. Energy Procedia, 63: 7677–7684

16 Chadwick R A, Williams G A, Falcon-Suarez I. (2019). Forensic mapping of seismic velocity heterogeneity in a CO₂ layer at the Sleipner CO₂ storage operation, North Sea, using time-lapse seismic. International Journal of Greenhouse Gas Control, 90: 102793

17 Chen Y, Gao Y, Zhao Y, Chen L, Dong C, Sun B. (2018). Experimental investigation of different factors influencing the replacement efficiency of CO₂ for methane hydrate. Applied Energy, 228: 309–316

18 CollettT S (2019). Gas Hydrate Production Knowledge Gained, Offsher Technology Conference, Houston, D031S035R002

19 Connell L, Down D, Lu M, Hay D, Heryanto D. (2015). An investigation into the integrity of wellbore cement in CO₂ storage wells: Core flooding experiments and simulations. International Journal of Greenhouse Gas Control, 37: 424–440

20 Dai Z, Middleton R, Viswanathan H, Fessenden-Rahn J, Bauman J, Pawar R, Lee S Y, Mcpherson B. (2014). An integrated framework for optimizing CO₂ sequestration and enhanced oil recovery. Environmental Science & Technology Letters, 1(1): 49–54

21 Dai Z, Xu L, Xiao T, Mcpherson B, Zhang X, Zheng L, Dong S, Yang Z, Soltanian M R, Yang C. . (2020). Reactive chemical transport simulations of geologic carbon sequestration: methods and applications. Earth-Science Reviews, 208: 103265

22 Dai Z, Zhang Y, Bielicki J, Amooie M A, Zhang M, Yang C, Zou Y, Ampomah W, Xiao T, Jia W. . (2018). Heterogeneity-assisted carbon dioxide storage in marine sediments. Applied Energy, 225: 876–883

23 Deusner C, Bigalke N, Kossel E, Haeckel M. (2012). Methane production from gas hydrate deposits through injection of supercritical CO₂. Energies, 5(7): 2112–2140

24 Ding M, Yue X A, Zhao H, Zhang W. (2013). Extraction and its effects on crude oil properties during CO₂ flooding. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 35(23): 2233–2241

25 Eide L I, Batum M, Dixon T, Elamin Z, Graue A, Hagen S, Hovorka S, Nazarian B, Nøkleby P H, Olsen G I. . (2019). Enabling large-scale carbon capture, utilization, and storage (CCUS) using offshore carbon dioxide (CO₂) infrastructure developments: a review. Energies, 12(10): 1945

26 Eide Ø, Fernø M A, Karpyn Z, Haugen Å, Graue A. (2013). CO₂ injections for enhanced oil recovery visualized with an industrial CT-scanner. In: Proceedings of IOR 2013-17th European Symposium on Improved Oil Recovery, Saint Petersburg. European Association of Geoscientists & Engineers, 480–487

27 Esene C, Zendehboudi S, Aborig A, Shiri H. (2019). A modeling strategy to investigate carbonated water injection for EOR and CO₂ sequestration. Fuel, 252: 710–721

28 Fan S, Wang X, Wang Y, Lang X. (2017). Recovering methane from quartz sand-bearing hydrate with gaseous CO₂. Journal of Energy Chemistry, 26(4): 655–659

29 Fink J. (2021). Petroleum Engineer’s Guide to Oil Field Chemicals and Fluids (3rd ed.). Houston: Gulf Professional Publishing, 643–731

30 Fraga D M, Skagestad R, Eldrup N H, Korre A, Haugen H A, Nie Z, Durucan S. (2021). Design of a multi-user CO₂ intermediate storage facility in the Grenland region of Norway. International Journal of Greenhouse Gas Control, 112: 103514

31 Gamal Rezk M, Foroozesh J. (2022). Uncertainty effect of CO₂ molecular diffusion on oil recovery and gas storage in underground formations. Fuel, 324: 124770

32 Gambelli A M, Rossi F. (2019). Natural gas hydrates: comparison between two different applications of thermal stimulation for performing CO₂ replacement. Energy, 172: 423–434

33 Gao W, Liang S, Wang R, Jiang Q, Zhang Y, Zheng Q, Xie B, Toe C Y, Zhu X, Wang J, Huang L, Gao Y, Wang Z, Jo C, Wang Q, Wang L, Liu Y, Louis B, Scott J, Roger A C, Amal R, He H, Park S E. (2020). Industrial carbon dioxide capture and utilization: state of the art and future challenges. Chemical Society Reviews, 49(23): 8584–8686

34 Harkin T, Filby I, Sick H, Manderson D, Ashton R. (2017). Development of a CO₂ specification for a CCS hub network. Energy Procedia, 114: 6708–6720

35 Hawthorne S B, Gorecki C D, Sorensen J A, Steadman E N, Harju J A, Melzer S(2013). Hydrocarbon mobilization mechanisms from upper, middle, and lower Bakken reservoir rocks exposed to CO₂. In proceedings of the SPE Unconventional Resources Conference Canada, Calgary. Society of Petroleum Engineers, SPE 167200

36 Hirai S, Okazaki K, Tabe Y, Hijikata K, Mori Y. (1997). Dissolution rate of liquid CO₂ in pressurized water flows and the effect of clathrate films. Energy, 22(2): 285–293

37 HoffmanN (2018). The CarbonNet Project’s Pelican Storage Site in the Gippsland Basin. In: Proceedings of 14th International Conference on Greenhouse Gas Control Technologies, Melbourne. Social Science Research Network, GHGT-14, 142–155

38 Hoffman N, Alessio L. (2017). Probabilistic approach to CO₂ plume mapping for prospective storage sites: the CarbonNet experience. Energy Procedia, 114: 4444–4476

39 Hoffman N, Hardman-Mountford N, Jenkins C, Rayner P J, Gibson G, Sandiford M. (2017). GipNet – baseline environmental data gathering and measurement technology validation for nearshore marine carbon storage. Energy Procedia, 114: 3729–3753

40 Hofmann M, Schellnhuber H J. (2010). Ocean acidification: a millennial challenge. Energy & Environmental Science, 3(12): 1883–1896

41 House Kurt Z Schrag Daniel P, Harvey Charles F, Lackner Klaus S. (2006). Permanent carbon dioxide storage in deep-sea sediments. Proceedings of the National Academy of Sciences, 103(33): 12291–12295

42 HUME . (2018). Maritime Executive. Ocean storage of CO₂. Available online at website of maritime-executive.com (accessed July 29, 2018)

43 Filby I, Harkin T. (2018). CarbonNet–the relative costs for providing a CCS transport and storage service. In: Proceedings of 14th Greenhouse Gas Control Technologies Conference, Melbourne. Social Science Research Network, 181–183

44 IEA (2016). 20 Years of Carbon Capture and Storage: Accelerating Future Deployment. Paris: International Energy Agency (IEA)

45 IEA (2020a). CCUS in Clean Energy Transitions. Paris: International Energy Agency (IEA)

46 IEA (2020b). Energy Technology Perspectives 2020. Special Report on Carbon Capture Utilization and Storage. Paris: International Energy Agency (IEA)

47 IEA (2021). Net Zero by 2050-A Roadmap for the Global Energy Sector. International Energy Agency (IEA)

48 Jia B, Tsau J S, Barati R. (2019). A review of the current progress of CO₂ injection EOR and carbon storage in shale oil reservoirs. Fuel, 236: 404–427

49 Kang H, Koh D Y, Lee H. (2014). Nondestructive natural gas hydrate recovery driven by air and carbon dioxide. Scientific Reports, 4(1): 6616

50 Kapetaki Z, Scowcroft J. (2017). Overview of carbon capture and storage (CCS) demonstration project business models: risks and enablers on the two sides of the Atlantic. Energy Procedia, 114: 6623–6630

51 KawahariY, Hatakeyama A (2016). Carbon Sequestration Leadership Forum (CSLF). Offshore CO₂-EOR pilot project in Vietnam. Tokyo: JX Nippon Oil & Gas Exploitation Corporation

52 Khojastehmehr M, Madani M, Daryasafar A. (2019). Screening of enhanced oil recovery techniques for Iranian oil reservoirs using TOPSIS algorithm. Energy Reports, 5: 529–544

53 Koh D Y, Ahn Y H, Kang H, Park S, Lee J Y, Kim S J, Lee J, Lee H. (2015). One-dimensional productivity assessment for on-field methane hydrate production using CO₂/N₂ mixture gas. AIChE Journal. American Institute of Chemical Engineers, 61(3): 1004–1014

54 Koh D Y, Kang H, Lee J W, Park Y, Kim S J, Lee J, Lee J Y, Lee H. (2016). Energy-efficient natural gas hydrate production using gas exchange. Applied Energy, 162: 114–130

55 Lee S, Lee Y, Lee J, Lee H, Seo Y. (2013). Experimental verification of methane–carbon dioxide replacement in natural gas hydrates using a differential scanning calorimeter. Environmental Science & Technology, 47(22): 13184–13190

56 Lee Y, Kim Y, Seo Y. (2015). Enhanced CH₄ recovery induced via structural transformation in the CH₄/CO₂ replacement that occurs in sH hydrates. Environmental Science & Technology, 49(14): 8899–8906

57 Li J F, Ye J L, Qin X W, Qiu H J, Wu N Y, Lu H L, Xie W W, Lu J A, Peng F, Xu Z Q. . (2018). The first offshore natural gas hydrate production test in South China Sea. China Geology, 1(1): 5–16

58 Li X S, Xu C G, Zhang Y, Ruan X K, Li G, Wang Y. (2016). Investigation into gas production from natural gas hydrate: a review. Applied Energy, 172: 286–322

59 Liang S, Liang D, Wu N, Yi L, Hu G. (2016). Molecular mechanisms of gas diffusion in CO₂ hydrates. Journal of Physical Chemistry C, 120(30): 16298–16304

60 Lu X, Tong D, He K. (2023). China’s carbon neutrality: an extensive and profound systemic reform. Frontiers of Environmental Science & Engineering, 17(2): 14

61 Lv J, Cheng Z, Duan J, Wang S, Xue K, Liu Y, Mu H. (2021). Enhanced CH₄ recovery from hydrate-bearing sand packs via CO₂ replacement assisted thermal stimulation method. Journal of Natural Gas Science and Engineering, 96: 104326

62 Mac Dowell N, Fennell P S, Shah N, Maitland G C. (2017). The role of CO₂ capture and utilization in mitigating climate change. Nature Climate Change, 7(4): 243–249

63 Mahdavi S, James L A. (2020). High pressure and high-temperature study of CO₂ saturated-water injection for improving oil displacement; mechanistic and application study. Fuel, 262: 116442

64 Martínez-García A, Sigman D M, Ren H, Anderson R F, Straub M, Hodell D A, Jaccard S L, Eglinton T I, Haug G H. (2014). Iron fertilization of the subantarctic ocean during the last ice age. Science, 343(6177): 1347–1350

65 Masuda Y, Yamanaka Y, Sasai Y, Magi M, Ohsumi T. (2009). Site selection in CO₂ ocean sequestration: dependence of CO₂ injection rate on eddy activity distribution. International Journal of Greenhouse Gas Control, 3(1): 67–76

66 McKinley G A, Pilcher D J, Fay A R, Lindsay K, Long M C, Lovenduski N S. (2016). Timescales for detection of trends in the ocean carbon sink. Nature, 530(7591): 469–472

67 Neele F, De Kler R, Nienoord M, Brownsort P, Koornneef J, Belfroid S, Peters L, Van Wijhe A, Loeve D. (2017). CO₂ transport by ship: The way forward in Europe. Energy Procedia, 114: 6824–6834

68 NilssonP A, Apeland S, DaleH M, DecarreS (2011). The costs of CO₂ transport: post-demonstration CCS in the EU. Brussels: Global CCS Institute

69 Orchard K, Hay M, Ombudstvedt I, Skagestad R. (2021). The status and challenges of CO₂ shipping infrastructures. In: Proceedings of 15th International Conference on Greenhouse Gas Control Technologies. Social Science Research Network, 98–107

70 Ota M, Saito T, Aida T, Watanabe M, Sato Y, Smith Jr R L, Inomata H. (2007). Macro and microscopic CH₄–CO₂ replacement in CH₄ hydrate under pressurized CO₂. AIChE Journal. American Institute of Chemical Engineers, 53(10): 2715–2721

71 Ouyang Q, Fan S, Wang Y, Lang X, Wang S, Zhang Y, Yu C. (2020). Enhanced methane production efficiency with in situ intermittent heating assisted CO₂ replacement of hydrates. Energy & Fuels, 34(10): 12476–12485

72 Pandey J S, Solms N V. (2019). Hydrate stability and methane recovery from gas hydrate through CH₄–CO₂ replacement in different mass transfer scenarios. Energies, 12(12): 2309

73 Park Y, Kim D Y, Lee J W, Huh D G, Park K P, Lee J, Lee H. (2006). Sequestering carbon dioxide into complex structures of naturally occurring gas hydrates. Proceedings of the National Academy of Sciences of the United States of America, 103(34): 12690–12694

74 Patchigolla K, Oakey J E. (2013). Design overview of high pressure dense phase CO₂ pipeline transport in flow mode. Energy Procedia, 37: 3123–3130

75 Qi Y, Ota M, Zhang H. (2011). Molecular dynamics simulation of replacement of CH₄ in hydrate with CO₂. Energy Conversion and Management, 52(7): 2682–2687

76 Renforth P, Henderson G. (2017). Assessing ocean alkalinity for carbon sequestration. Reviews of Geophysics, 55(3): 636–674

77 Roussanaly S, Skaugen G, Aasen A, Jakobsen J, Vesely L. (2017). Techno-economic evaluation of CO₂ transport from a lignite-fired IGCC plant in the Czech Republic. International Journal of Greenhouse Gas Control, 65: 235–250

78 Satter A, Iqbal G M. (2016). Reservoir Engineering. Boston: Gulf Professional Publishing, 313–337

79 Shagapov V S, Khasanov M K, Musakaev N G, Duong N H. (2017). Theoretical research of the gas hydrate deposits development using the injection of carbon dioxide. International Journal of Heat and Mass Transfer, 107: 347–357

80 Shi M, Woodley J M, Von Solms N. (2020). An experimental study on improved production performance by depressurization combined with CO₂-enriched air injection. Energy & Fuels, 34(6): 7329–7339

81 Siažik J, Malcho M, Lenhard R. (2017). Proposal of experimental device for the continuous accumulation of primary energy in natural gas hydrates. EPJ Web Conf., 143

82 Skauge A, Stensen J. (2003). Review of WAG field experience. In: Proceedings of the Oil Recovery–2003, 1st International Conference and Exhibition, Modern Challenges in Oil Recovery, Moscow, Russia, 19–23

83 Smith E, Morris J, Kheshgi H, Teletzke G, Herzog H, Paltsev S. (2021). The cost of CO₂ transport and storage in global integrated assessment modeling. International Journal of Greenhouse Gas Control, 109: 103367

84 Sohrabi M, Kechut N I, Riazi M, Jamiolahmady M, Ireland S, Robertson G. (2012). Coreflooding studies to investigate the potential of carbonated water injection as an injection strategy for improved oil recovery and CO₂ storage. Transport in Porous Media, 91(1): 101–121

85 Sohrabi M, Tehrani D H, Danesh A, Henderson G D. (2004). Visualization of oil recovery by water-alternating-gas injection using high-pressure micromodels. SPE Journal, 9(3): 290–301

86 Song Y, Wang S, Cheng Z, Huang M, Zhang Y, Zheng J, Jiang L, Liu Y. (2021). Dependence of the hydrate-based CO₂ storage process on the hydrate reservoir environment in high-efficiency storage methods. Chemical Engineering Journal, 415: 128937

87 Song Y C, Zhou H, Ma S H, Liu W G, Yang M J. (2018). CO₂ sequestration in depleted methane hydrate deposits with excess water. International Journal of Energy Research, 42(7): 2536–2547

88 Sun L, Wang T, Dong B, Li M, Yang L, Dong H, Zhang L, Zhao J, Song Y. (2021a). Pressure oscillation controlled CH₄/CO₂ replacement in methane hydrates: CH₄ recovery, CO₂ storage, and their characteristics. Chemical Engineering Journal, 425: 129709

89 Sun S, Hao Y, Zhao J. (2018a). Analysis of gas source for the replacement of CH₄ with CO₂ in gas hydrate production from the perspective of dissociation enthalpy. Journal of Chemical & Engineering Data, 63(3): 684–690

90 Sun X, Alcalde J, Bakhtbidar M, Elío J, Vilarrasa V, Canal J, Ballesteros J, Heinemann N, Haszeldine S, Cavanagh A. . (2021b). Hubs and clusters approach to unlock the development of carbon capture and storage: case study in Spain. Applied Energy, 300: 117418

91 Sun Y F, Wang Y F, Zhong J R, Li W Z, Li R, Cao B J, Kan J Y, Sun C Y, Chen G J. (2019). Gas hydrate exploitation using CO₂/H₂ mixture gas by semi-continuous injection-production mode. Applied Energy, 240: 215–225

92 Sun Y F, Zhong J R, Li R, Zhu T, Cao X Y, Chen G J, Wang X H, Yang L Y, Sun C Y. (2018b). Natural gas hydrate exploitation by CO₂/H₂ continuous injection-production mode. Applied Energy, 226: 10–21

93 Thorne R J, Sundseth K, Bouman E, Czarnowska L, Mathisen A, Skagestad R, Stanek W, Pacyna J M, Pacyna E G. (2020). Technical and environmental viability of a European CO₂ EOR system. International Journal of Greenhouse Gas Control, 92: 102857

94 Tsouris C, Szymcek P, Taboada-Serrano P, Mccallum S D, Brewer P, Peltzer E, Walz P, Adams E, Chow A, Johnson W K. . (2007). Scaled-up ocean injection of CO₂-Hydrate composite particles. Energy & Fuels, 21(6): 3300–3309

95 Tupsakhare S S, Castaldi M J. (2019). Efficiency enhancements in methane recovery from natural gas hydrates using injection of CO₂/N₂ gas mixture simulating in-situ combustion. Applied Energy, 236: 825–836

96 TuranG, Zapantis A, KearnsD, TammeE, StaibC, ZhangT, Burrows J, GillespieA, HavercroftI, Rassool D, et al. (2021). The global status of CCS: 2021. Global CCS Institute

97 UchiyamaT, Fujita Y, UedaY, NishizakiA, OkabeH, TakagiS, Mitsuishi H, KawaharaY, HuyL, TrungP N, TrungN H, et al. (2012). Evaluation of a Vietnam offshore CO₂ huff “n” puff test. In: Proceedings of the SPE Improved Oil Recovery Symposium, Tulsa, USA, SEP-154128-MS

98 Voronov V P, Gorodetskii E E, Podnek V E, Grigoriev B A. (2016). Properties of equilibrium carbon dioxide hydrate in porous medium. Chemical Physics, 476: 61–68

99 Wang P, Teng Y, Zhao Y, Zhu J. (2021). Experimental studies on gas hydrate-based CO₂ storage: state-of-the-art and future research directions. Energy Technology, 9(7): 210004

100 Wang X H, Sun Y F, Wang Y F, Li N, Sun C Y, Chen G J, Liu B, Yang L Y. (2017). Gas production from hydrates by CH₄-CO₂/H₂ replacement. Applied Energy, 188: 305–314

101 Warzinski R P, Lynn R J, Holder G D. (2000). Gas Hydrates: Challenges for the Future. 1st ed. New York: New York Academy of Sciences, 226–234

102 Wei W N, Li B, Gan Q, Li Y L. (2022). Research progress of natural gas hydrate exploitation with CO₂ replacement: a review. Fuel, 312: 122873

103 Weihs G A F, Kumar K, Wiley D E. (2014). Understanding the economic feasibility of ship transport of CO₂ within the CCS chain. Energy Procedia, 63: 2630–2637

104 White M, McGrail P. (2009). Designing a pilot-scale experiment for the production of natural gas hydrates and sequestration of CO₂ in class 1 hydrate accumulations. Energy Procedia, 1(1): 3099–3106

105 Williams B. (2022). Greenhouse Gases. Ocean sequestration. 2022. Available online at website of climate-policy-watcher.org (accessed November 14, 2022)

106 Xie Y, Zhu Y J, Zheng T, Yuan Q, Sun C Y, Yang L Y, Chen G J. (2021). Replacement in CH₄-CO₂ hydrate below freezing point based on abnormal self-preservation differences of CH₄ hydrate. Chemical Engineering Journal, 403: 126283

107 Xu C G, Cai J, Yu Y S, Chen Z Y, Li X S. (2018a). Research on micro-mechanism and efficiency of CH₄ exploitation via CH₄-CO₂ replacement from natural gas hydrates. Fuel, 216: 255–265

108 Xu C G, Cai J, Yu Y S, Yan K F, Li X S. (2018b). Effect of pressure on methane recovery from natural gas hydrates by methane-carbon dioxide replacement. Applied Energy, 217: 527–536

109 Xu Y, Ishizaka J, Aoki S. (1999). Simulations of the distribution of sequestered CO₂ in the North Pacific using a regional general circulation model. Energy Conversion and Management, 40(7): 683–691

110 Yamamoto K, Terao Y, Fujii T, Ikawa T, Seki M, Matsuzawa M, Kanno T. (2014). Operational overview of the first offshore production test of methane hydrates in the Eastern Nankai Trough. In: Proceedings of the Offshore Technology Conference, Houston. Offshore Technology Conference, OTC–25243-MS

111 Yamamoto K, Wang X X, Tamaki M, Suzuki K. (2019). The second offshore production of methane hydrate in the Nankai Trough and gas production behavior from a heterogeneous methane hydrate reservoir. RSC Advances, 9(45): 25987–26013

112 Yan Y, Li C, Dong Z, Fang T, Sun B, Zhang J. (2017). Enhanced oil recovery mechanism of CO₂ water-alternating-gas injection in silica nanochannel. Fuel, 190: 253–259

113 Yang H, Huang X, Hu J, Thompson J R, Flower R J. (2022). Achievements, challenges and global implications of China’s carbon neutral pledge. Frontiers of Environmental Science & Engineering, 16(8): 111

114 Yang H, Xu Z, Fan M, Gupta R, Slimane R B, Bland A E, Wright I. (2008). Progress in carbon dioxide separation and capture: a review. Journal of Environmental Sciences (China), 20(1): 14–27

115 Ye J L, Qin X W, Xie W W, Lu H L, Ma B J, Qiu H J, Liang J Q, Lu J A, Kuang Z G, Lu C. . (2020). The second natural gas hydrate production test in the South China Sea. China Geology, 3(2): 197–209

116 Yuan Q, Sun C Y, Yang X, Ma P C, Ma Z W, Liu B, Ma Q L, Yang L Y, Chen G J. (2012). Recovery of methane from hydrate reservoir with gaseous carbon dioxide using a three-dimensional middle-size reactor. Energy, 40(1): 47–58

117 Yuan Q, Wang X H, Dandekar A, Sun C Y, Li Q P, Ma Z W, Liu B, Chen G J. (2014). Replacement of methane from hydrates in porous sediments with CO₂-in-water emulsions. Industrial & Engineering Chemistry Research, 53(31): 12476–12484

118 Zeng Y, Li K. (2020). Influence of SO₂ on the corrosion and stress corrosion cracking susceptibility of supercritical CO₂ transportation pipelines. Corrosion Science, 165: 108404

119 Zhang X, Li Y, Yao Z, Li J, Wu Q, Wang Y. (2018). Experimental study on the effect of pressure on the replacement process of CO₂–CH₄ hydrate below the freezing point. Energy & Fuels, 32(1): 646–650

120 Zhao J, Zhang L, Chen X, Fu Z, Liu Y, Song Y. (2015). Experimental study of conditions for methane hydrate productivity by the CO₂ swap method. Energy & Fuels, 29(11): 6887–6895

121 Zhou D, Li P, Liang X, Liu M, Wang L. (2018). A long-term strategic plan of offshore CO₂ transport and storage in northern South China Sea for a low-carbon development in Guangdong province, China. International Journal of Greenhouse Gas Control, 70: 76–87

122 Zhou D, Zhao Z, Liao J, Sun Z. (2011). A preliminary assessment on CO₂ storage capacity in the Pearl River Mouth Basin offshore Guangdong, China. International Journal of Greenhouse Gas Control, 5(2): 308–317

123 Zhou X, Fan S, Liang D, Du J. (2008). Determination of appropriate condition on replacing methane from hydrate with carbon dioxide. Energy Conversion and Management, 49(8): 2124–2129

124 Zhu H, Xu T, Yuan Y, Xia Y, Xin X. (2020). Numerical investigation of the natural gas hydrate production tests in the Nankai Trough by incorporating sand migration. Applied Energy, 275: 115384