Microbial Enhanced Oil Recovery : MEOR

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Table of contents

1 Literature review on MEOR and bacterial dynamics 
1.1 Microbial Enhanced Oil Recovery : MEOR
1.1.1 EOR objectives and forms
1.1.2 Thermal, Chemical and Miscible EOR
1.1.3 MEOR technology
1.1.4 Advantages and disadvantages of MEOR
1.1.5 Factors affecting MEOR
1.1.6 Previous studies on MEOR
1.2 Capillary trapping of oil and surfactants
1.2.1 Mechanism of capillary trapping
1.2.2 Mechanism of the action of surfactants
1.2.3 Effect of capillary trapping in flow models
1.3 Structure of Microbes and their Functions
1.3.1 Structure of a cell
1.3.2 Bacteria movement
1.3.3 Metabolism of bacteria
1.3.4 Products of metabolism: metabolites
1.4 Kinetics of population evolution
1.4.1 Population growth
1.4.2 Mathematical models of population kinetics
1.4.3 Population decay
2 Mathematical model of MEOR 
2.1 General mathematical model of MEOR
2.1.1 Structure of the fluids
2.1.2 General properties of micro-biochemical systems (MBS)
2.1.3 Mass balance equations
2.1.4 Description of the impact of biosurfactant
2.1.5 Kinetic functions
2.2 Reduction to the model of kinematic waves
2.2.1 Ideal mixing and volume concentrations
2.2.2 Kinematic wave model
2.2.3 Conditions at the shocks
2.2.4 Derivation of the conditions at the shocks
3 Asymptotic solution at weak bioreactivity 
3.1 Method of Solution
3.1.1 Concept of weak bioreactivity
3.1.2 Asymptotic expansion
3.1.3 Expected structure of the solution
3.2 Semi-analytical solution to the MEOR problem
3.2.1 Behaviour of concentrations
3.2.2 Stage 1: before the impact of surfactant
3.2.3 Stage 2: formation of an oil bank
3.2.4 Stage 2: moment of the appearance of the biochemical shock (t1)
3.2.5 Moment of appearance of the third shock (t2)
3.2.6 Velocity of the third shock
3.2.7 Stage 3: collision of two mechanical shocks
3.2.8 Behaviour at large times
4 Numerical analysis of MEOR scenarios 
4.1 Numerical qualitative analysis of the process
4.1.1 Description of the numerical code COMSOL Multiphysics
4.1.2 Input parameters
4.1.3 Comparison with net waterflooding
4.1.4 Impact of viscosity ratio
4.1.5 Numerical results for low injection concentration
4.1.6 Numerical results for high injection concentration
4.1.7 Impact of the form of the population kinetics
4.1.8 Impact of the characteristic kinetic rate
4.2 Simulation of a case study
4.2.1 Description of the Kazakhstan oil fields
4.2.2 On the implementation of MEOR in Kazakhstan’s oil fields
4.2.3 Data for Uzen oil field
4.2.4 Calculation of the field case for Uzen oil field
Appendices 
A Analytical solution to the Buckley-Leverett equation
B Numerical code Matlab: population growth for various kinetic functions
Bibliographie