permeability targeting through geomechanics and advanced
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Permeability targeting through geomechanics and advanced
seismic interpretation
Hani Abul Khair
Martin Hand
Dennis Cooke
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Cooper Basin geomechanical drawbacks
High differential stress Reverse stress regime at large depths
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Solutions for South Australia
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1- Locate highly fractured areas
Image logs Using advanced seismic attributes for fracture
modelling
Fracture prediction using current day stress and paleo-stress (stress inversion).
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2- Model stress variation
3D stress modelling Geomechanical fault and fracture susceptibility
modelling
Stress tensor from regional mapping and calcite twinning
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3- Locate brittle areas
Comparing petrography and seismic attributes Permian sand net-gross, does it control H? Stress and fractures from seismic inversion
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4- Model interaction between stress and fractures during hydraulic fracturing
Modelling fracture growth and height Frac flow back optimization
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Using advanced seismic attributes for fracture modelling
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3D stress modelling
Stress measured in frac jobs
dept
h
Lower modelled stress (blue) is on low side of measured stress
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Predicting fractures using stress inversion
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Geomechanical fault and fracture susceptibility modelling
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Modelling fracture growth in Abaqus
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Comparing petrography and seismic attributes
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Permian sand net-gross, does it control H?
Patchawarra SS channels
Well Gidgealpa Fault Big Lake Fault
Tirrawarra SS
Does the massive Tirrawarra Sandstone bear a higher stress load than the low net-to-gross Patchawarra sands above it? Does this cause tip screen out?
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Frac flow back optimization
Will high pressure fluids left in place after a frac job damage the formation? If so how might that damage be mitigated?
Permeability and fluid invasion profile
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Stress and natural fractures from seismic at Barrolka 3D
Different seismic methods to be compared to well control:
1. Azimuthal AVO
2. HTI migration velocity analysis
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Interpreting Cooper paleo-stress tensor with seismic structure and calcite twinning
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Future projects
Seismic diffracted waves for faults and fracture mapping
Modelling seismic acquisition and processing for detecting faults and fractures in the subsurface
Modelling seismic acquisition and processing parameters to detect deeply seated faults in the Cooper Basin
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Acknowledgments
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