|Title||Interferometric SAR modelling of near surface data to improve geological model in the Surat Basin, Australia|
|Author||Moghaddam, N F; Nourollah, H; Vasco, D W; Samsonov, S V; Rüdiger, C|
|Source||Journal of Applied Geophysics vol. 194, 104444, 2021 p. 1-17, https://doi.org/10.1016/j.jappgeo.2021.104444 Open Access|
|Alt Series||Natural Resources Canada, Contribution Series 20210509|
|Lat/Long WENS|| 150.0000 151.0000 -26.5500 -27.2250|
|Subjects||geophysics; models; modelling, structural; modelling; hydrocarbons; deformation; seismology; subsurface geology; structural analysis; synthetic aperture radar surveys (SAR); Jurassic;
|Illustrations||tables; location maps; stratigraphic columns; 3-D models; frequency distribution diagrams; plots|
|Program||Canada Centre for Remote Sensing People Support and Leadership|
|Released||2021 08 26|
This paper presents a study on geophysical inverse modelling for subsurface structural properties of an unconventional hydrocarbon site that was monitored previously by
Interferometric Synthetic Aperture Radar (InSAR) technology for surface deformation. A static three-dimensional geomodel along with extracted property maps replicates the depth of each underlying stratigraphic unit and structural feature with the
density of each geological layer. We examine the hypothesis that integration of elastic properties of each formation layer with InSAR observations in a stratified elastic medium will lead to a viscoelastic geophysical inverse problem that can be
solved to estimate fractional volume change at the reservoir level. Moreover, we examine synthetic scenarios in which the elastic properties of the formations are perturbed before determining the resulting impact on the rate of surface deformation.
The results show that although the slope of underlying formations, their density and depth can define the extent and pattern of a deformation signal, their properties have a marginal impact on volumetric change compared to the dense network of
shallow depth Coal Seam Gas (CSG) mining wells. Besides, it is also demonstrated that the inversion of InSAR deformation maps can resolve the uncertainties associated with low-resolution seismic interpretation as well as filling the data gaps within
seismic acquisitions. A significant contribution of this investigation to the geological basin modelling involves a) introducing a remote and non-invasive technology such as InSAR to improve geophysical mapping of subsurface structures such as faults
in areas with sparse or no reflective seismic information, and b) applying a multi-layer viscoelastic geophysical source model for an unconventional hydrocarbon reservoir such as CSG.
|Summary||(Plain Language Summary, not published)|
This paper presents a study on geophysical inverse modelling for subsurface structural properties of an unconventional hydrocarbon site that was
monitored previously for surface deformation. We examine the hypothesis that integration of elastic properties of each formation layer with remote sensing observations in a stratified elastic medium will lead to a viscoelastic geophysical inverse
problem that can be solved to estimate fractional volume change at the reservoir level.