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Abstract

Summary

High water production is a common challenge during water-flooding of oil reservoirs. Improvement of volumetric sweep by blocking of fractures can improve the oil production and reduce the water production. The objective for the study was to investigate the potential for plugging of fractures in carbonate rocks using nanocomposite gels. Gelation was first investigated in experiments before dynamic experiments were modelled by using the simulator IORCoreSim, a core scale simulator developed at the IOR Centre of Norway.

The rheology and gelation time for bulk solutions were determined by varying concentrations of nano-clay, polymer and cations. The most promising gels were further evaluated in flooding experiments using fractured chalk models. Simulations by IORCoreSim was used to model the gelation kinetics with different Laponite clay and HPAM concentrations, injection time, gel location and potential effect on oil recovery. Laboratory data were used as the basis for the simulations.

In static experiments, the nano-clay formed weak to highly viscous gels. The strongest nanocomposite gels were formed together hydrolyzed polyacrylamide. Potassium, calcium and dissolved crushed chalk gave shorter aging time and stronger gels. Some glycols were found to retard the gelation reaction, but did not impair the strength of the gels. Flooding in fractured chalk models at 100% water saturation showed that both nanocomposite gels and nano-clay gels have potential to plug fractures in carbonate rocks.

The IORCoreSim simulator was found to be appropriate to investigate the effects of Laponite/HPAM interactions with different gel component concentrations and conditions. Parameters for the calculation of gelation kinetics for Laponite/HPAM systems was tuned against the experimental results and then used as input in the simulations. IORCoreSim can also simulate placement and properties of Laponite/HPAM gels in fractured core plug experiments.

Nanocomposite gels gave excellent gel strengths and they can plug fractures in carbonate rocks. Further evaluations of nanocomposite gels should be carried out at higher temperatures, with other brine compositions and with oil present. The gelation time can be delayed by adding retarders to the gelant solution, and this can allow longer transport of the gelant into target zones before formation of rigid gels.

Nanocomposite gels showed good potential for plugging of fractures in chalks, and these gels can be environmentally friendly. The gels can also be used to improve volumetric sweep in geological storage of gases. The IORCoreSim model has potential to simulate placement of gels.

© EAGE Publications BV
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2025-04-02
2026-02-11

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References

  1. Andersen, P.Ø., Lohne, A., Stavland, A., Hiorth, A., BrattekAs, B., 2019. Core scale modeling of polymer gel dehydration by spontaneous imbibition. SPE Journal24, 1201–1219. https://doi.org/10.2118/190189-PA
     [Google Scholar]
  2. Baghban Salehi, M., Sefti, M.V., Vasheghani-Farahani, E., Mousavi Moghadam, A., 2014. Effect of Process Variable on the Gelation Time of Sulfonated Polyacrylamide Nanocomposite Hydrogel. J Dispers Sci Technol35, 663–671. https://doi.org/10.1080/01932691.2013.803929
     [Google Scholar]
  3. Bai, Y., Shang, X., Wang, Z., & Zhao, X. (2018). Experimental study of low molecular weight polymer/nanoparticle dispersed gel for water plugging in fractures. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 551, 95–107. https://doi.org/10.1016/i.colsurfa.2018.04.067
     [Google Scholar]
  4. Bailey, B., Crabtree, M., Tyrie, J., Elphick, J., Kuchuk, F., Romano, C., & Roodhart, L. (2000). Water control. Oilfield review, 12(1), 30–51.
     [Google Scholar]
  5. BYK, A. (2016). Laponite Performance Additives, https://www.byk.com
     [Google Scholar]
  6. El-Karsani, K. S. M., Al-Muntasheri, G. A., & Hussein, I. A. (2014). Polymer systems for water shutoff and profile modification: a review over the last decade. Society of Petroleum Engineers, 19(01), 135–149.
     [Google Scholar]
  7. Fall, A., & Bonn, D. (2012). Shear thickening of Laponite suspensions with poly (ethylene oxide). Soft Matter, 8 (17), 4645–4651. https://doi.org/10.1039/C2SM07089H
     [Google Scholar]
  8. Green, D. W., & Willhite, G. P. (1998). Enhanced oil recovery (Vol. 6): Henry L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers.
     [Google Scholar]
  9. Haraguchi, K., & Takehisa, T. (2002). Nanocomposite hydrogels: A unique organic-inorganic network structure with extraordinary mechanical, optical, and swelling/de-swelling properties. Advanced materials, 14(16), 1120–1124. 10.1002/1521‑4095(20020816)14:163.0.CO;2‑9
     https://doi.org/10.1002/1521-4095(20020816)14:163.0.CO;2-9 [Google Scholar]
  10. Hiorth, A., Sagen, J., Lohne, A., Nossen, J., Vinningland, J.L., Jettestuen, E., Sira, T., 2016. IORSim -A simulator for fast and accurate simulation of Multi-phase geochemical interactions at the field scale. 15th European Conference on the Mathematics of Oil Recovery, ECMOR 2016. https://doi.org/10.3997/2214-4609.201601882
     [Google Scholar]
  11. Hiorth, A., Sagen, J., Lohne, A., Omekeh, A., Nossen, J., Haukås, J., Sira, T., 2017. Simulation of sodium silicate water diversion using IORSim, in: IOR NORWAY 2017 – 19th European Symposium on Improved Oil Recovery: Sustainable IOR in a Low Oil Price World. https://doi.org/10.3997/2214-4609.201700283
     [Google Scholar]
  12. Imqam, A. (2015). Particle gel propagation and blocking behavior through high permeability streaks and fractures. (Ph. D. in Petroleum Engineering Doctoral Dissertations), Missouri University of Science and Technology.
     [Google Scholar]
  13. Koohi, A. D., Moghaddam, A. Z., Sefti, M. V., and Moghadam, A. M. (2011). Swelling and gelation time behavior of sulfonated polyacrylamide/chromium triacetate hydrogels. Journal of Macromolecular Science, Part B, 50(10), 1905–1920. https://doi.org/10.1080/00222348.2010.549419
     [Google Scholar]
  14. Lohne, A., 2024. User's manual for IORCoreSim-combined EOR and SCAL simulator (Version 1.352).
     [Google Scholar]
  15. Mohammadi, S., Vafaie Sefti, M., Baghban Salehi, M., Mousavi Moghadam, A., Rajaee, S., & Naderi, H. (2015). Hydrogel swelling properties: comparison between conventional and nanocomposite hydrogels for water shutoff treatment. Asia-Pacific Journal of Chemical Engineering, 10(5), 743–753. 10.1002/apj.1912
     [Google Scholar]
  16. Norwegian environmental agency (2014) Informative Inventory Reporthttps://www.miljodirektoratet.no/globalassets/publikasjoner/M125/M125.pdf
     [Google Scholar]
  17. Offshore Norge (2024) Climate and Environmental Report. www.offshorenorge.no/contentassets/5d821e0162034367bfbc67bee14dc8bf/offshore-norges-climate-and-environmental-report-2024.pdf
     [Google Scholar]
  18. Skrettingland, K., Giske, N. H., Johnsen, J.-H., & Stavland, A. (2012). Snorre in-depth water diversion using sodium silicate-single well injection pilot. Paper presented at the SPE Improved Oil Recovery Symposium, 14–18 April, Tulsa, Oklahoma, USA. https://doi.org/10.2118/154004-MS
     [Google Scholar]
  19. Sun, W., Wang, T., Wang, C, Liu, X., Tong, Z., 2013. Scaling of the dynamic response of hectorite clay suspensions containing poly (ethylene glycol) along the universal route of aging. Soft Matter9, 6263. https://doi.org/10.1039/c3sm50436k
     [Google Scholar]
  20. Sun, W., Yang, Y., Wang, T., Huang, H., Liu, X., Tong, Z., 2012. Effect of adsorbed poly(ethylene glycol) on the gelation evolution of Laponite suspensions: Aging time-polymer concentration superposition. J Colloid Interface Sci376, 76–82. https://doi.org/10.1016/j.jcis.2012.01.064
     [Google Scholar]
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Plugging of Fractures in Carbonate Rocks by Nanocomposite Gels
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202531044
/content/papers/10.3997/2214-4609.202531044
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