Prior assessment of CO2 leak rate through cracks sealed by nanoparticle gels
Tóm tắt
The leakage of hydrocarbon fluids through cracks in the annular cement and CO2 storage is a major concern to the Petroleum Industry. A significant risk is posed when repairing leakage in a micro annuli channel with smaller apertures. A low-viscosity sealant that can generate a long-lasting resilient seal is desired. The solution to sealing these channels might lie in a novel application using nano-silica Gel. In this study, laboratory tests were carried out to examine the capabilities of nano-silica gels to seal the cracks. Analyzing its rheological property, the gel strengths of nano-silica gels were found to increase with an increase in nano-silica concentration. Additionally, it was discovered that as the concentration of nano-silica increases, the sealing and leakage pressures, defined as the pressures before and after water breakthrough, respectively, increase as well. With a typical 15% concentration of nano silica in gel, a sealing pressure gradient of 80.2 psi/in and a leakage pressure gradient of 30 psi/in at a leaking rate of 1 cc/min were noted. To validate the validity of the experimental results, a mathematical model was developed to predict the leakage rate of sealed fractures. The model suggests that the young’s modulus of sealant is a key property of nano-sealants and further investigations are needed to validate the mathematical model for quantitative use. This study suggests a novel strategy for enhancing cement zonal isolation and reducing cement failure in oil and gas sector.
Tài liệu tham khảo
Benge G (2009) Improving wellbore seal integrity in CO2 injection wells. SPE/IADC Drill Conf Exhib. https://doi.org/10.2118/119267-MS
Duguid A, Butsch R, Carey JW, Celia M, Chugunov N, Gasda S, Ramakrishnan TS, Stamp V, Wang J (2013) Pre-injection baseline data collection to establish existing wellbore leakage properties. Energy Proc 37:5661–5672. https://doi.org/10.1016/j.egypro.2013.06.488
Duguid A, Guo B, Nygaard R (2017) Well integrity assessment of monitoring wells at an active CO2-EOR flood. Energy Proc 114:5118–5138. https://doi.org/10.1016/j.egypro.2017.03.1667
Fu C, Guo B, Liu N (2022) Leak off assessment of nanoparticle-stabilized CO2 foams for fracturing applications. J Nat Gas Sci Eng 100:104493. https://doi.org/10.1016/j.jngse.2022.104493
Gallagher PM, Mitchell JK (2002) Influence of colloidal silica grout on liquefaction potential and cyclic undrained behavior of loose sand. Soil Dyn Earthq Eng 22:1017–1026. https://doi.org/10.1016/S0267-7261(02)00126-4
Goodwin KJ, Crook RJ (1992) Cement sheath stress failure. SPE Drill Eng 7:291–296. https://doi.org/10.2118/20453-PA
Guo B, Duguid A, Nygaard R (2017a) Statistical analysis of CO2 exposed wells to predict long term leakage through the development of an integrated neural-genetic algorithm. Univ of Louisiana at Lafayette. https://doi.org/10.2172/1373948
Guo B, Wei N, Song J, Lee J (2017b) Prediction of the maximum allowable bottom hole pressure in CO2 injection wells. J Petrol Sci Eng 156:575–581. https://doi.org/10.1016/j.petrol.2017.06.033
Havet G, Isayev AI (2003) A thermodynamic approach to the rheology of highly interactive filler-polymer mixtures. Part II. Comparison with polystyrene/nanosilica mixtures. Rheol Acta 42:47–55. https://doi.org/10.1007/s00397-002-0253-z
Hossain MM, Amro MM (2010) Drilling and completion challenges and remedies of CO2 injected wells with emphasis to mitigate well integrity issues. SPE Asia Pac Oil Gas Conf Exhib. https://doi.org/10.2118/133830-MS
Jousten K (2008) Handbook of vacuum technology. Wiley-VCH, Weinheim
Lorenz B, Persson BNJ (2009) Leak rate of seals: comparison of theory with experiment. Euro Phys Lett 86:44006. https://doi.org/10.1209/0295-5075/86/44006
Nguyen V, Olayiwola O, Guo B, Liu N (2021) Well cement degradation and wellbore integrity in geological CO2 storages: a literature review. Pet Petrochem Eng J. https://doi.org/10.23880/ppej-16000269
Nguyen V, Olayiwola O, Liu N, Guo B (2022) Investigation of nano-silica solution flow through cement cracks. Sustainability 15(1):577. https://doi.org/10.3390/su15010577
Nygaard R, Salehi S, Weideman B, Lavoie RG (2014) Effect of dynamic loading on wellbore leakage for the wabamun area CO2-sequestration project. J Can Pet Technol 53:69–82. https://doi.org/10.2118/146640-PA
Olayiwola O, Nguyen V, Yousuf N, Baudoin N, Liu N, Guo B (2022b) Experimental investigation of nano-silica gel properties for well integrity remediation. Energy Fuels 36:14094–14100. https://doi.org/10.1021/acs.energyfuels.2c02921
Olayiwola O, Nguyen V, Andres R, Liu N(2022a) The application of Nano-silica gel in sealing well micro-annuli and cement channeling. In: American associate of drilling engineering fluids technical conference and exhibition. https://www.aade.org/application/files/1516/5237/7567/AADE-22-FTCE-SPP-10_-_Olayiwola_-_Paper.pdf.
Persson BNJ (2022) Fluid Leakage in static rubber seals. Tribol Lett 70:31. https://doi.org/10.1007/s11249-022-01573-8
Weideman B, Nygaard R (2014) How cement operations affect your cement sheath short- and long-term integrity. In: American association of drilling engineers fluids technical conference and exhibition, Houston, Texas. AADE-14-FTCE-20
Zareie C, Bahramian AR, Sefti MV, Salehi MB (2019) Network-gel strength relationship and performance improvement of polyacrylamide hydrogel using nano-silica; with regards to application in oil wells conditions. J Mol Liq 278:512–520. https://doi.org/10.1016/j.molliq.2019.01.089
Zhang X, Guo B (2014) A review of CO2 behavior during geological storage and leakage assessment. Int J Recent Dev Eng Technol 3:14–23
Zhang P, Guo B, Liu N (2021) Numerical simulation of CO2 migration into cement sheath of oil/gas wells. J Nat Gas Sci Eng 94:104085. https://doi.org/10.1016/j.jngse.2021.104085