Long-term evolution of the Argentinean Continental margin: implications for hydrocarbon generation, migration, leakage and climate feedback
Passive continental margins are dynamic environments and are characterised by shallow shelf areas containing thick sedimentary packages derived from onshore erosion. At the same time, continental shelf regions host a large proportion of the worlds hydrocarbon accumulations and are consequently of high economic relevance. Natural hydrocarbon seepage is a process recognised to occur, in varying intensities, along passive continental margins of the Earth, where intense carbon release into the hydrosphere and atmosphere, or sequestration within the sediments, take place. Such exhalations, containing methane and carbon dioxide, contribute to atmospheric greenhouse gas contents and have a high potential to force climate change. Nevertheless quantification of these emissions and their variability through geologic time have so far not been carried out on the western South Atlantic. The Colorado, Salado and Austral Basins (Fig. 1) are ideal locations to study basin development together with the occurrence of natural gas leakage through the sediments to the seafloor. This project contributes to understand the potential effect of thermogenic gas emissions on paleo- and present-day climate. The project belongs to the DFG priority program “SAMPLE”: South Atlantic Margin Processes and Links with onshore Evolution”. Results from this project will be integrated into the Methane on the Move (MOM) project.
- Generate a 3D Geo-Model of the Colorado, Salado, and Austral Basins evolution through time.
- Identify indications of active petroleum systems, using well data, seismic data, and geochemical data.
- Reconstruct and quantify hydrocarbon generation, migration, accumulation, and leakage history.
- Model thermogenic methane emissions to the hydro- and atmosphere through geologic time.
- Seismo-stratigraphic interpretation, 2D seismic reflection data and integration/correlation of borehole data (Petrel TM software).
- Identification, classification and mapping of the paleo and present-day gas presence/ leakage indicators (i.e. pockmarks, mounds, gas chimneys or flat/ bright spots).
- Construction of a 3D basin-scale geomodel as input for 3D petroleum system modelling (Petromod TM software).
- Markus Loegering (email@example.com)
- Zahie Anka (firstname.lastname@example.org)
- Rolando di Primio (email@example.com)
- Petrobras Energia S.A. (PESA), Buenos Aires, Argentina
- Federal Institute of Georesources Germany (BGR)
- Deutsche Forschungsgemeinschaft (DFG) (Priority Program "SAMPLE")