Enhanced Oil Recovery

November 11, 1011

From 2017 till 2021 I was involved in the industrial collaboration with Russian petroleum company GazpromNeft. We were doing several projects on Enhanced Oil Recovery methods (EOR). Our special attention was the chemical flooding: the injection of water with dissolved chemical agents (polymer, surfactants etc), which helps to increase the oil production by decreasing the viscosity ratio aspect and increasing the sweep efficiency. We investigated:

  • the influence of the viscous fingering phenomenon for real-field data
  • design of the chemical flooding scheme. In particular, how to calculate the chemical slug sizes in order to prevent the early breakthrough of the slug (see the figure above)
  • semi-analytical construction of the solutions to 1-dimensional models
  • design and interpretation of SWCTT (single-well chemical tracer test)

Publications

Vanishing adsorption limit of Riemann problem solutions for the polymer model
We introduce the vanishing adsorption criterion for contact discontinuities and apply it to the Glimm-Isaacson model of chemical …
Yulia Petrova, Bradley J. Plohr, Dan Marchesin
PDF Project Project DOI arXiv
Velocity of viscous fingers in miscible displacement: Intermediate concentration
We investigate one-phase flow in porous medium corresponding to a miscible displacement process in which the viscosity of the injected …
Fedor Bakharev, Aleksandr Enin, Sergey Matveenko, Dmitry Pavlov, Yulia Petrova, Nikita Rastegaev, Sergey Tikhomirov
PDF Project Project DOI arXiv
Impact of dissipation ratio on vanishing viscosity solutions of the Riemann problem for chemical flooding model
The solutions for a Riemann problem arising in chemical flooding models are studied using vanishing viscosity as an admissibility …
Fedor Bakharev, Aleksandr Enin, Yulia Petrova, Nikita Rastegaev
PDF Project Project DOI arXiv
Optimal polymer slugs injection profiles
The graded viscosity banks technology (tapering) for polymer flooding is studied for several different models of mixing zones behavior. …
Fedor Bakharev, Aleksandr Enin, Konstantin Kalinin, Yulia Petrova, Nikita Rastegaev, Sergey Tikhomirov
PDF Project Project DOI arXiv
Velocity of viscous fingers in miscible displacement: Comparison with analytical models
The paper investigates the linear growth of the mixing zone, in a pessimistic scenario, during polymer slug injection into a water …
Fedor Bakharev, Andrey Groman, Aleksandr Enin, Alexander Kalyuzhnyuk, Sergey Matveenko, Yulia Petrova, Ivan Starkov, Sergey Tikhomirov
PDF Project Project DOI arXiv
Calculation of graded viscosity banks profile on the rear end of the polymer slug
One of the motivations for EOR methods is the possible instability of the front between phases with high contrast of mobility. Highly …
Fedor Bakharev, Andrey Groman, Aleksandr Enin, Alexander Kalyuzhnyuk, Konstantin Kalinin, Yulia Petrova, Nikita Rastegaev, Sergey Tikhomirov
Project Project DOI
Numerical investigation of viscous fingering phenomenon for raw field data
This paper numerically investigates the viscous fngering phenomenon. Two-dimensional horizontal model reservoir was considered for …
Fedor Bakharev, Lorenzo Campoli, Aleksandr Enin, Sergey Matveenko, Yulia Petrova, Sergey Tikhomirov, Andrey Yakovlev
PDF Project Project DOI