Institute of Geosciences, Friedrich Schiller University Jena

project coordination


research issue

Chemical and mineralogical analyses, H2-CO2-laboratory and flow through experiments

 

"In situ investigations during autoclave experiments with natural and technical materials and the chemical and mineralogical analyses and surface characteristics"

analytical work

 The first procedure is the sampling in cooperation with the industry or research partners in the corresponding drill core storage sites. Afterwards the macroscopic and petrographic analyses of the drill core material and the borehole cements are conducted. Followed by sample preparation, according to the planed analytical methods and shipping of the sample material to the different subprojects.

Thin sections, rock fragments and rock cubes, with an edge length of max. 1 cm, were used for the petrographic and mineralogical classification of the drill core material. Although microscopic analyses are conducted for the characterization of the fabric, mineral composition and the sample surface properties. The characterization of the open pore space is also conducted.

Additionally submicroscopic investigations and interpretations of steel alloys and cements from the borehole casings are performed.

numerical modelling

High resolution microcomputer tomography scans of sandstones and subsequent numerical modelling are conducted for the evaluation of pore space and fluid flow variations, induced due to CO2 and H2 laboratory experiments. This working package is conducted in close cooperation with subproject 5.


Laboratory experiments

Experiments under reservoir conditions are performed in a brand-new laboratory at the Institute of Geosciences in Jena. The autoclave experiments are performed with:

  • hydrogen and carbon dioxide
  • carbon dioxide

 for time periods of 1-8 weeks.

 

During the experiments under reservoir conditions the synthetic formation fluid used, is temporarily sampled. Additionally submicroscopic analyses are conducted during the experiments over a high security glass in the top of the autoclave. Therefore a brand-new approved digital microscope is used.