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

Quantitative prediction of injected CO2 at Sleipner using wave-equation based AVO

In the context of carbon capture and storage (CCS), quantitative estimation of injected CO2 is of vital importance to verify if the process occurs without any leakage. From a geophysical perspective this is challenging as a CO2 plume has a severe imprint on seismic data. While this makes delineation of the plume rather straightforward, for...

Identifying hidden risk elements for CO2 storage from reprocessed seismic data

CO2 storage needs economic business cases through cost-effective exploration and production and needs license-to-operate through public support. Re-interpretation and reprocessing of vintage geophysical data is a means to achieve cost-effective exploration whereas de-risking and conformance control of storage operations is a means to obtain...

4D seismic history matching of the Norne field model using ensemble-based methods with distance parameterization

A distance parameterization of flood fronts derived from time-lapse seismic anomalies was recently developed to facilitate incorporation of time-lapse seismic data into history matching workflows based on ensemble methods such as the ensemble Kalman filter (EnKF) and the ensemble smoother (ES). A number of advantages were demonstrated on...

High resolution 3D seismic survey off-shore the Netherlands

TNO has carried out a high resolution 3D seismic survey off-shore Rotterdam. The new deployment concept that was tested with this survey results in high-quality 3D images of the shallow subsurface at relatively low cost, particularly in comparison with conventional 3D seismic data acquisition. Initially, the pilot survey aims to demonstrate the...

Testing a simple and low-cost method for long-term (baseline) CO2 monitoring in the shallow subsurface

Implementation of geological CO2 storage requires monitoring for potential leakage, with an essential part being establishment of baseline CO2 in soil gas. CO2 concentrations and weather parameters were monitored for ∼2 years at three locations in the Netherlands. CO2 concentrations in soil ranged from 0.1 to 28% and were variable with site,...

TNO monitoring plan development tool

TNO has developed a software tool that supports the design of a risk-based monitoring plan for a CO2 storage site. The purpose of the tool is to aid storage site operators by facilitating a structured monitoring technologies selection or evaluation process. The tool makes a selection this recommended monitoring technologies, based on a set of...

Robustness of features for automatic target discrimination in high resolution polarimetric SAR data.

We have studied the robustness of features against aspect variability for the purpose of target discrimination using polarimetric 35 Ghz ISAR data. Images at a resolution of 10 cm and 30 cm have been used for a complete aspect range of 360 degrees. The data covered four military targets: T72, ZSU23/4, T62, and BMP2. For the study we composed...

Radon transforms and time-frequency representations for ISAR motion compensation and imaging

The use of the Radon transform and the Wigner-Radon power spectrum for ISAR motion compensation is described. It is shown that the local Radon power spectrum is closely related to the Cohen's class of quadratic time-frequency representations in a similar way as the Radon and Fourier transform are related. The peak of the local Radon transform is...