In order to generate a reasonably connected volume without merging adjacent (disconnected) conducting layers a series a 3D filters were applied to reprocess the data. The 3D filter was redesigned three times inorder to improve the volume. Final filtering sequence selected is as follows:
Gaussian blur.
Removal of vertical tubular structures
Removal of separated thin sheets
Removal of (X axis) tubular structures
Removal of (Y axis) tubular structures
Gaussian blur
Removal of separated thin sheets
Removal of separated horizontal edges
Gaussian blur
Initial mesh contained approx 33M triangles.
Mesh optimization
Small disconnected volumes were eliminated. An automatic optimization step was undertaken with the following characteristics:
Vertical distance from the underlying surface was limited to 5m.
Horizontal distance from the underlying surface was limited to 50m.
Edge length was limited to 600m.
The resulting mesh was of sufficient quality and size for use in reservoir/geomechanical simulations.
Report
A detailed report on the mesh extraction process for the lower reservoir (SCA) can be downloaded here: Lower Reservoir PDF
Reverse SCA masks
Once a surface is extracted it can be used to generate masks on sugarcube grids. You can download a number of masks generated using different algorithms.
A medium resolution anti-aliased mask can be downloaded from the link.
It is generated on the original sugarcube grid (50x50x2.5m), however, the value at each cell was sampled on a 4x4x1 subgrid.
The resulting mask is a shade of gray having 16 different values (between 0 and 1).
