Body-wave seismic interferometry on passive seismic data for imaging CO2 reinjection at the Hellisheiði geothermal power plant, Iceland

CO2 and H2S are reinjected at Hellisheiði, Iceland, to reduce the emissions of greenhouse gases. An active-source seismic campaign was done in July, 2021, to image the reinjection reservoir with various seismic methods for consecutive monitoring. At the same time, passive-source seismic data was recorded for imaging.<br/>We process this passive...

Full-waveform inversion of seismic data using instantaneous-phase coherency

With a rapid increase in computational resources two dimensional full-waveform inversion is evolving into a promising tool for near-surface geophysics. However, near-surface applications suffer from local minima due to amplitude errors associated with two dimensional full-waveform inversion. By clever definition of the misfit function, the...

Geophysical methods for forensic investigations: detection and characterization of simulated clandestine burials using GPR and GCM

In this thesis I conducted ground penetrating radar (GPR) and ground conductivity meter (GCM) surveys to detect the presence of simulated clandestine burials at the Amsterdam Research Initiative for Subsurface Taphonomy and Anthropology (ARISTA) test facility, and determine their characteristic response in this environment; providing valuable...

Buried rock contour of a megalithic structure: Assessment of the buried rock contour of a megalithic structure by means of non-destructive geophysical methods

The dolmens erected in the province of Drenthe between 3350-2700 BC are the most ancient monuments of the Netherlands. They consist of a long assemblage of rocks capped with boulders which served as burial chambers for the Funnel Beaker population. Despite their robust look, dolmens are vulnerable. For example, one of the caprocks of dolmen D14...

Simulation of matrix acidization with self-diverting acid systems

Seismic analysis of fluid mud: Detection of shear parameters in fluid mud and the relation between seismic velocities and yield stresses

In this research, a new measuring method to detect shear parameters in fluid mud is proposed, namely using shear waves, or S-waves opposed to the conventional pressure waves, or P-waves. Currently, detecting fluid mud is done by the use of P-waves. This paper shows that conventional P-waves velocity measurements are unsuitable for linking...

Using reflected seismic waves to estimate rheological properties of the fluid-mud layer for port applications

Current Port of Rotterdam procedure is to define the nautical depth based on the density of a fluid-mud layer, that settles at the bottom of the port. Rheological parameters could be an improved indicator for nautical depth and decrease the frequency and cost of dredging. I investigate the use of reflected seismic waves to derive in situ...

Finite difference feasibility modelling of time-lapse seismic noise interferometry for CO2 monitoring

Seismic Interferometry (SI) with ambient noise is a recently developed method for subsurface imaging that involves cross-correlating ambient noise from passive seismic data to reveal the earth’s reflection response. Based on this technique, TNO aims at developing a methodology for efficient monitoring of CO2 geological sequestration in Carbon...