Reservoir monitoring by inversion of reservoir pressure and saturation changes from time-lapse AVO differences and time-shifts

The main storage-related challenges for accelerated deployment of CCS are capacity, confidence and cost. These challenges are to be addressed by focusing on improving strategies for monitoring and management of the pore pressure distribution in the CO2 storage reservoir. Pressure-driven decision support protocols are to be developed for safe and...

Generating synthetic CPTs from marine seismic reflection data using a neural network approach

For the development of an offshore wind farm, understanding the geological and geotechnical conditions in the upper 100 m below seafloor is crucial when reducing ground risk and designing (cost-effective) wind turbine foundations. We developed and tested a neural network approach to derive predictive (i.e. synthetic) values for CPT parameters–...

Identifying risked potential of seals and flow in ultradeep and shallow geothermal reservoirs

Optimization of sparse 4D seismic surveys using seismic full waveform inversion

Accurate characterization and reliable monitoring of geological reservoirs often requires extensive geophysical measurements, in particular time-lapse (4D) seismic surveys. The conventional approach to reveal the time-lapse changes is to perform comprehensive seismic surveys with high repeatability. This approach is often not economically viable...

Studying CO2 storage with ambient-noise seismic interferometry: A combined numerical feasibility study and field-data example for Ketzin, Germany

Seismic interferometry applied to ambient-noise measurements allows the retrieval of the seismic response between pairs of receivers. We studied ambient-noise seismic interferometry (ANSI) to retrieve time-lapse reflection responses from a reservoir during CO2 geologic sequestration, using the case of the experimental site of Ketzin, Germany. We...

Studying CO2 storage with ambient-noise seismic interferometry: A combined numerical feasibility study and field-data example for Ketzin, Germany

Seismic interferometry applied to ambient-noise measurements allows the retrieval of the seismic response between pairs of receivers. We studied ambient-noise seismic interferometry (ANSI) to retrieve time-lapse reflection responses from a reservoir during CO<inf>2</inf> geologic sequestration, using the case of the experimental site of Ketzin,...

A feasibility study of time-lapse seismic noise interferometry for CO2 monitoring at Ketzin

Since 2008, CO2 has been injected at the demonstration site for CO2 sequestration in Ketzin, Germany. Since 2009, a permanent array of seismic receivers installed by TNO at the injection site has recorded passive data continuously. It is the intention of TNO to use seismic interferometry (SI) by cross-correlation applied to the recorded ambient...