Network Design
Survey design is a crucial step in any data acquisition process, impacting the quality, accuracy, and usability of the data.
We aim at extracting the maximum of information with a lean receiver network, in full compliance with regulations.
Receivers need to be strategically positioned to ensure the detection of small events and their accurate locations within a given volume of interest. As for any passive acquisition, environmental noise must be considered, along with its variations over time and space. Noise characterization is a critical step of the design workflow.
ISAMGEO network design for seismic monitoring considers:
Network geometry: define receiver locations for surface or/and wellbore deployment from GIS or aerial maps.
Azimuthal gap: to guarantee optimal coverage of the area
Ambient seismic noise characteristics and levels through Probabilistic Power Spectral Densities,
Site geology: P- & S-wave velocity, site amplification effects.
Network sensitivity (predicted completion magnitude) as well as location uncertainty, predicted through simulation.
A desktop study provides an ideal receiver layout, which needs to be refined by evaluating logistic constraints, the quality of the data transmission, and the availability of power sources.