New Technologies and Methods for Characterization of the Shallow Subsurface

Offentlig prosjektsammendrag

This project aims to develop new three-dimensional (3D) high-resolution imaging solutions for characterization of the shallow subsurface in fjords and coastal environments. The current market for shallow subsurface imaging is dominated by high-resolution two-dimensional (2D) technologies, and both geological and geotechnical models used in the marine infrastructure industry are based on grids of 2D data. This approach introduces uncertainties to the subsurface models due to the inherent limitations of describing 3D features with 2D data. In order to overcome these limitations, this study will develop tailored imaging solutions for high-resolution 3D characterization. Implementation of such technology allows for mapping of smaller features like boulders and soft layers, provide better correlation with core data and use of data driven 3D inversion of subsurface properties. Marine infrastructure projects will benefit from the improved subsurface models in form of added flexibility, cost effectiveness and safety. The study takes a multi-disciplinary approach that includes development of seismic acquisition equipment in addition to optimization of processing and interpretation methods for high-resolution 3D imaging. The new technologies and methods build on proven techniques from the oil and gas industry. A central part of the development includes the design of a new acquisition system using the P-Cable 3D seismic system of UiT The Arctic University of Norway. The results of the study will give users in both industry and academia better tools for integrated interpretation of the shallow subsurface.