SOLID/SALT PRECIPITATION KINETICS DURING CO2 INJECTION INTO RESERVOIR

About this project

<p>In this work, we will focus on finding optimal parameters such as pressure and<br> volume flow during injection of supercritical CO2 into saline aquifers. The main physical phenomenon which<br> prevents achieving high injection rates is salt precipitation. This effect can be esspetially prominent for shallow<br> and low-permeability reservoirs. It can severely reduce the reservoir permeability around the well, induce<br> excess pressure build-up, and cause a decline in injectivity Injection of CO2 to rock formation can also have a<br> negative impact on porosity and permeability of porous medium because grain displacement, compaction, and<br> shrinkage-swelling and thermochemical processes such as precipitation of minerals and asphaltenes, and<br> hydrate formation.<br> In the proposed research we will fill the gap in the knowledge about length (distance), magnitude, and velocity<br> of capillary-driven backflow, viscous forces under different thermodynamic, continuity of water film conditions,<br> the impact of salinity and salt type on the magnitude, distribution, and precipitation pattern, nucleation and<br> growth crystals. As a result we would give an answer on how strong is an effect of CO2 injectivity to induced<br> salt precipitation.<br> Studied of the interaction of CO2 and brine with various types of rocks under a wide range of pressures,<br> temperatures as well as observation of flow through microchannels will be performed by an existing<br> microfluidic system. Another microfluidic system utilizing Raman spectroscopy will be constructed. That new<br> system will be used in order to analyze the kinematic and dynamic of the capillary behavior of the brine/CO2<br> system. It will also be able to distinguish between gaseous CO2 and soluble CO2 and as a result, we would<br> be able to measure solubility, minimal miscibility pressure, bubble/dew point and determine phase equilibrium<br> curve.<br> &nbsp;</p>

Bilateral cooperation results

A partnership between AGH University of Krakow and the University of Oslo facilitated joint experiments, knowledge exchange, and set up long-term collaboration beyond the project scope. As a result several application for further funding were submitted The project "Acceleration of Climate Change Mitigation Technologies Deployment: PolishNorwegian CCS Network – ACCLAIMED:CCS, was financed by Island, Liechtenstein and Norway, through EEA and Norway Grants under the grant FWD-Green-11; Partners: AGH University of Krakow, University of Oslo, and Norwegian Energy Partners (NORWEP).

Project partners

• University of Oslo Donor project partner· Norway