PhD in Seismic Acquisition Design

The Faculty of Civil Engineering and Geosciences provides leading, international research and education in road and water engineering, earth sciences, traffic and transport control, and delta technology. Innovation and sustainability are central themes.

The research addresses global social issues and is closely interwoven with education as well as with the work carried out by a broad spectrum of knowledge institutions. The faculty consists of 17 sections distributed among the Departments of Design & Construction, Hydraulic Engineering, Transport & Planning, Water Management and Geotechnology.

The Geotechnology Department is divided into four sections: Geo-engineering, Applied Geophysics and Petrophysics, Applied Geology, and Petroleum Engineering. Exploration, exploitation and use of the Earth’s resources and the subsurface space are central themes in the research conducted here. Attention is directed toward sustainable and environmentally friendly, innovative technology developments. The department focuses on both deep underground (> 1 km) and shallow subsurface (<1 km) space.

This PhD project aims to design an optimal seismic acquisition geometry for detecting and monitoring the steam injection in the Schoonebeek field. Method:
  • Determine the expected angle-dependent reflection properties of the rock prior and after steam injection as well as expected differences in the speed of sound that will lead to differences in arrival times of reflection events;
  • Determine the most relevant angles (those with the biggest changes) and temporal differences for detecting the moving steam front;
  • Design an acquisition geometry using the ‘Focal Beam’ analysis method (existing Delphi Consortium development). This method utilises all available information on the subsurface velocity model. The method would be the core of an interactive optimisation procedure, yet to be developed. A constraint will be the capabilities of the envisioned acquisition system (in particular the limited number of buried sources). However, the benefits of an approach without such constraints will be also shown. Possibly some constraints could be relaxed by using a movable, unburied source in addition, e.g. the linear actuator as proposed in an accompanying project;
  • Acquire seismic data according to the proposed acquisition geometry;
  • Process the data with the aim of imaging the changes due to the steam injection.
  • Conclusions on the possibility of monitoring the steam injection process.
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