• journal_title：Environmental Geosciences
• Contributor：Andrea Förster ; Ben Norden ; Kim Zinck-Jørgensen ; Peter Frykman ; Johannes Kulenkampff ; Erik Spangenberg ; Jörg Erzinger ; Martin Zimmer ; Jürgen Kopp ; Günter Borm ; Chris Juhlin ; Calin-Gabriel Cosma ; Suzanne Hurter
• Publisher：American Association of Petroleum Geologists (AAPG)
• Date：2006-
• Format：text/html
• Language：en
• Identifier：10.1306/eg.02080605016
• journal_abbrev：Environmental Geosciences
• issn：1075-9565
• volume：13
• issue：3
• firstpage：145
• section：ARTICLES

Since April 2004, preparatory work prior to CO₂ injection has been conducted in the CO₂SINK Project, the European Union's first research and development activity on the in-situ testing of geological storage of CO₂ near the town of Ketzin, Germany. Carbon dioxide will be injected into a saline aquifer of the Triassic Stuttgart Formation in an anticlinal structure of the northeast German Basin. The drilling of one injection and two observation wells will commence at the end of 2006. The predrilling phase focuses on the baseline geological parameters of the anticline. The Stuttgart Formation is lithologically heterogeneous; it consists of sandy channel-(string)-facies rocks, with good reservoir properties alternating with muddy flood-plain-facies rocks of poor reservoir quality. Playa-type rocks form the immediate cap rock above the CO₂SINK reservoir. A geostatistical approach has been applied to describe the reservoir architecture between and beyond well control. This model forms the basis for the generation of reservoir-dynamic models of CO₂ injection that assist in the planning of injection operations and in the understanding of CO₂ plume evolution. A verification of the geometry of the reservoir and the structural situation of its overburden is expected from a three-dimensional baseline seismic survey that was conducted in the autumn of 2005. Laboratory experiments under simulated in-situ conditions were performed to evaluate the geophysical signature of rocks saturated with CO₂. The chemical composition of the groundwater and the CO₂ flux in the soil were analyzed across the Ketzin anticline, providing the baseline for a monitoring program during and after injection of CO₂, targeted at the detection of potential CO₂ leakage from the storage reservoir.