Investigation of the influence of viscoplastic oil on filtration temperature

The paper investigates the temperature dependence of filtration processes of viscoplastic oil in porous media. The relevance of this study is associated with the increasing amount of hard-to-recover hydrocarbon reserves, which are often represented by highly viscous and non-Newtonian oils, for which the classical Darcy law cannot be directly applied. A mathematical filtration model is proposed in which oil viscosity depends on the pressure gradient, enabling the consideration of a threshold shear gradient and the structural breakdown behaviour of viscoplastic oil. A radially symmetric filtration problem is analyzed, taking into account variations in density, filtration velocity, and temperature during fluid flow in the reservoir. Numerical simulations are performed to evaluate the temporal and spatial temperature distributions for both viscoplastic and Newtonian oils. Particular attention is paid to the influence of adiabatic effects and the Joule–Thomson effect on temperature evolution in the near-wellbore zone and at greater distances from the well. The results show that the temperature behaviour of viscoplastic oil significantly differs from that of conventional oil and strongly depends on filtration time and rheological properties. The obtained results demonstrate the advantages of the proposed modelling approach for a more accurate description of filtration and thermal processes in reservoirs containing viscoplastic oils. The study has practical significance for reservoir engineering and may contribute to improving the efficiency of well operation and production performance.

References

1. Vylomov D.D., Shtin N.A., Optimization of the search for zones of residual reserves with considering the non-newtonian properties of oil in the process of hydrodynamic modeling (In Russ.), Ekspozitsiya Neft′ Gaz, 2021, no. 2, pp. 57–60, URL: https://doi.org/10.24412/2076-6785-2021-2-57-60

2. Maksimov V.M., Dmitriyev N.M., Mikhaylov N.N. et al., Innovatory technologics of the effective development of hydrocarbon fields with hard-extractive reserves on the base of new physico-mathematical models and adequate simulation (In Russ.), Georesursy, geoenergetika, geopolitika, 2012, no. 2.

3. Grachev S.I., Korotenko V.A., Kushakova N.P. et al., Liquid filtration in anomalous collectors (In Russ.), Izvestiya TPU, 2019, no. 7, pp. 104–113,

DOI: https://doi.org/10.18799/24131830/2019/7/2183

4. Akhmedov S.A., Akhmedova Z.KH., Mathematical modeling of the problems of displacement of the paraffin oil with water, taking into account the water injection technology (In Russ.), Vestnik Dagestanskogo gosudarstvennogo universiteta. Seriya 1: Yestestvennyye nauki, 2019, V. 34, no. 1, pp. 32-39,

DOI: https://doi.org/10.21779/2542-0321-2019-34-1-32-39

5. Mustafayev S.D., Gasymova S.A.-G., Influence of viscoplastic oil properties on well performance in the presence of a sand plug at the bottomhole (In Russ.), Neftyanoye khozyaystvo = Oil Industry, 2019, no. 2, pp. 58–60, DOI: https://doi.org/10.24887/0028-2448-2019-2-58-60