Abstract
Subseismic pathway prediction by three-dimensional structural restoration and strain analysis based on seismic interpretation
Highlights
The prediction of subseismic scale faults is important for the management and exploration of reservoirs and their overburden
The reason for this strategy was that the study area is part of the passive margin between southern Australia and Antarctica (Williamson et al, 1990): major faults dip Compaction Strain versus Deformation Strain
We propose that parts of the study area with e1 strain magnitudes over 2%–3% are potential areas of subseismic scale faulting, and point to pathways of potential fluid or gas migration
Summary
The prediction of subseismic scale faults is important for the management and exploration of reservoirs and their overburden. 8 stratigraphic horizons (including the reservoir, seal, and overburden) and 24 major faults were interpreted in the time domain (Ziesch et al, 2017; Figure 4). The complete 3-D model of the study area, including 24 faults and 8 horizons, was restored back into the undeformed state, from southwest to northeast that is, the northeastern edge of the study area was kept fixed during restoration The reason for this strategy was that the study area is part of the passive margin between southern Australia and Antarctica (Williamson et al, 1990): major faults dip Compaction Strain versus Deformation Strain. Most extension occurred during the deposition of Skull Creek Mst. and the underlying Waarre Fm., that is, most faults terminated at approximately 66 m.y.a. To better understand the finite retrodeformation strain maps, the different components of compactional strain and deformation strain for the Skull Creek Mst. were separately analyzed. The central area between fault Naylor South and fault 16 in the south and fault Buttress Northwest and fault 2 in the north underwent intermediate amounts of deformation
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