Anisotropic attenuation in CHIMNEY data collected during the JC152 cruise, North Sea 2017 (NERC Grant NE/N015762/1)

This is a generic powerpoint showing results from azimuthal Q analysis of seismic data collected during the JC152 cruise (Bull et al., 2018). The presentation gives an introduction to the CHIMNEY project and study area. Data from 2 sources (GI guns and Surface sparker) are analysed, giving rise to measurements of attenuation as a function of two-wave time, azimuth and frequency at two locations. The data are inverted using a rock physics model, and probability distributions for matrix permeability and fracture size at the two sites are developed. Reference: Bull, J. M. (2018). Cruise Report – RRS James Cook JC152: CHIMNEY - Characterisation of Major Overburden Pathways above Sub-seafloor CO2 Storage Reservoirs in the North Sea Scanner and Challenger Pockmark Complexes,University of Southampton, 55 pp. Available at: https://eprints.soton.ac.uk/420257/ NERC Grant - Characterization of major overburden leakage pathways above sub-seafloor CO2 storage reservoirs in the North Sea (CHIMNEY)