Simulation of CO2 injectivity in a laboratory cylindrical-cone model

Abstract

In this thesis the processes (caused by injection of carbon dioxide) - mainly migration of particles and dissolution and precipitation of carbonates - which cause changing of permeability (and consequently injectivity) are studied. In chapter 2 we study previous investigations and theories, made by different researchers and related to our topic. The goal of this chapter is to sum up all previous researches and to understand the physical processes in reservoir during the injection of CO2. Chapter 3 is mainly dedicated to creating of a mathematical model of particle migration. Main formulas for the model is presented and described there. Also chapter contains description of a program (on MatLab), where this mathematical model is implemented. Chapter 4 deals with the description of physical (cylindrical-cone) model (which does not exist now, but will be constructed in nearest future) and with computer simulation (in CMG Stars). The result of simulation is the changing of pressure distribution in reservoir (including changing of pressure near the injection well – changing of injectivity), caused by particle migration due to injection of carbon dioxide. Thus, the main result of this work is the computer program, where all the theoretical investigations are implemented, and simulation, based on the data, produced by this program.