Possibilities of Limiting Migration of Natural Gas in Boreholes in the Context of Laboratory Studies

Marcin Kremieniewski, Rafał Wiśniowski, Stanisław Stryczek and Grzegorz Orłowicz
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Marcin Kremieniewski: Oil and Gas Institute, National Research Institute, 25A Lubicz Street, 31-503 Kraków, Poland
Rafał Wiśniowski: Department of Drilling and Geoengineering, Faculty of Drilling, Oil and Gas, AGH University of Science and Technology, 30 Mickiewicza Ave., 30-059 Kraków, Poland
Stanisław Stryczek: Department of Drilling and Geoengineering, Faculty of Drilling, Oil and Gas, AGH University of Science and Technology, 30 Mickiewicza Ave., 30-059 Kraków, Poland
Grzegorz Orłowicz: Department of Drilling and Geoengineering, Faculty of Drilling, Oil and Gas, AGH University of Science and Technology, 30 Mickiewicza Ave., 30-059 Kraków, Poland

Energies, 2021, vol. 14, issue 14, 1-13

Abstract: Gas migration through fresh and hardened cement slurry is an ongoing problem in the oil industry. In order to eliminate this unfavourable phenomenon, research is being conducted on new compositions of slurries for gas wells. The article presents the results of research for slurries with low and high resistance to gas migration. The proper selection of the quantity and quality of components makes it possible to design slurry with the required static structural strength values. In addition, the cement sheath of such anti-migration slurry has low porosity and a very low proportion of large pore spaces. Additionally, the mechanical parameters do not decrease during long-term deposition in borehole-like conditions. By obtaining these results, it was possible to design slurry whose cement sheath has high corrosion resistance. The new slurry has a lower water-cement ratio. Additionally, GS anti-migration copolymer, anti-filter additive and latex are used. The presence of n-SiO2 aqueous solution and microcement allows for sealing the microstructure of the hardened cement slurry. Such modifications significantly improve the technological parameters of the cement slurry and the cement coat formed from it.

Keywords: gas migration; well cementing; cement slurry; cement sheath; corrosion resistance; gas outflows (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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