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ISTRICI: Tools for facilitating seismic depth imaging and velocity analysis with Seismic Unix to analyse a natural gas hydrate system
Tinivella and Giustiniani 2023, ISTRICI: Tools for facilitating seismic depth imaging and velocity analysis with Seismic Unix. Computers and Geosciences, 180, 105458, https://doi.org/10.1016/j.cageo.2023.105458
ISTRICI can be downloaded from the following public repository: https://github.com/utinivella/ISTRICI;
a README file is provided for each workflow (INTER, CIG, and TRAD); an example is also available.
ISTRICI uses codes from Seismic Unix, free software that can be downloaded here: https://wiki.seismic-unix.org/doku.php.
Theoretical models to translate seismic velocity in terms of gas phase concentrations and estimation of geothermal gradient
Gas phase’s concentration model. (a) BSR-derived geothermal gradient (GG) (red line) with estimated error (dashed red lines); (b) gas phase concentration model superimposed on the pre-stack depth migration section. Positive values are referred to the gas hydrate amount and negative values are referred to the free gas amount. After Vargas-Cordero et al. (2021). Gas origin linked to paleo BSR. Scientific Reports 11, 23960, https://doi.org/10.1038/s41598-021-03371-z
Tinivella, U. The seismic response to overpressure versus gas hydrate and free gas concentration (2002). Journal of Seismic Exploration, 11 (3), pp. 283-305.
Tinivella, U. A method for estimating gas hydrate and free gas concentrations in marine sediments (1999). Bollettino di Geofisica Teorica ed Applicata, 40 (1), pp. 19-30.
Theoretical base of the gas hydrate stability zone at present, past and future conditions
Modeling of MGL1701-30 section over 13,000 years BP. The top panel shows seafloor (blue), BSR (red) and BGR (green) at the present and seafloor (blue dots) and BSR (orange dots) at 13,000 years BP. The black lines represent faults. The bottom panels show the BSR depth variation versus time around three selected positions, as indicated by the arrows in the top panel. See details in: Vargas-Cordero et al. (2021). Gas origin linked to paleo BSR. Scientific Reports 11, 23960, https://doi.org/10.1038/s41598-021-03371-z
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