Nazarbayev University
Graduate School of Education

School of Mining & Geosciences

Programs

Geochemical Modelling of Fluid-Rock Interactions

Description – This course offers a comprehensive overview of the application of thermodynamic theory to the numerical of geochemical processes of importance to the petroleum and mining industries. The course, given over two complete days, will alternate relatively short theoretical presentations with practical exercises using geochemical. Depending on the nature of the audience (or on prior suggestion by the attendees), the instructor will design specific numerical simulation exercises, which may include for example the diagenesis of hydrocarbon reservoirs, water-rock interactions associated with enhanced oil recovery processes, acid-gas sequestration in depleted oil and gas fields, or the transport of metals in hydrothermal fluids and the formation of  re deposits. Audience – Geologists, reservoir engineers and drilling engineers from oil companies as well as geologists and engineers from mining companies. Pre-requisite – Basics of physical chemistry Objective – The course will provide the attendees with the fundamentals required to carry out geochemical modelling studies in the context of their professional duties. Materials – The participants will receive a notebook with the content of the theoretical sessions, and the exercises accompanying the theory. They will also have the possibility to install on their laptops geochemical softwares available at no cost from academic or research institutions.
Program Schedule Day 1
Time Activity
09.00 – 10.30 Theoretical basis·         Equilibrium constant and standard Gibbs energy ·         Entropies, heat capacities, volumes ·         Integration of Gibbs energy in temperature and pressure
  Break
11.00 – 12.30 Thermodynamic databases·         Characteristics of databases which can be downloaded from the web to perform geochemical calculations ·         Introduction to the SUPCRT92 computer program with applications
Lunch break
13.30 – 15.00 Mineral-solution equilibria·         Complexation reactions and the speciation of chemical elements in aqueous solutions ·         Construction of activity diagrams and projection of fluid compositions ·         Calculation of the saturation states of fluids with respect to mineral assemblages ·         Redox reactions and Eh – pH diagrams
  Break
15.30 – 17.00 Geochemical modeling·         Introduction to the Geochemist Workbench software with exercises
Day 2
Time Activity
09.00 – 10.30 Redox processes·         Redox reactions, Nernst equation, redox potential ·         Eh – pH diagrams
  Break
11.00 – 12.30 Geochemical modelling of redox processes
  Lunch break
13.30 – 15.00 Mass transfer in geochemical processes·         Reaction progress variable ·         Numerical simulation of dissolution and precipitation of minerals
  Break
15.30 – 17.00 Kinetics of geochemical reactions·         Rate laws and determination of kinetic parameters ·         Geochemical processes involving bacterial reactions