«Automation and Informatization of the fuel and energy complex»

Pore-network modeling of oil displacement from a microfluidic chip by aqueous solutions modified by various additives

UDC: 532.5-1/-9+622.276
DOI: -

Authors:

¹ Siberian Federal University, Krasnoyarsk, Russia
² Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk, Russia

Keywords: pore network model, oil displacement, modifying additives, micro-fluid chip

Annotation:

The authors of the article numerically study the effect of various additives modifying the physical properties of the fluid being displaced on the process of oil displacement from a microfluidic chip. A well-proven pore-network approach is used for modeling. The propagation of the modifying additive in the displacing fluid was modeled as the transfer of a passive impurity. Thus, the concentration of the additive and, as a consequence, the distribution of physical properties in the displacing fluid is not uniform. To model this process, a unique mathematical pore-network model of convective-diffusion transfer of a passive component over a network with suppression of numerical diffusion was developed. Three types of modifying additives are considered in the article. AES surfactant changes the surface tension coefficient, acrylic polymer Polyfloc A2020 modifies the viscosity of the displacing fluid, and silicon oxide nanoparticles (SiO2) change the contact angle value at the water-oil-rock interface. The results of the study showed that all three additives increase the amount of oil recovered during the post-displacement process, but in the case of viscosity modification, the pressure drop in the microchip increased significantly.

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