Advanced Pressure Concepts

Course Outline:

3 Day Course: The principal objective of this course is to teach participants how pressure can be predicted in complex geological settings as well as being used for seal breach analysis and the understanding of hydrodynamic plays.

The course employs a mix of lectures and practical exercises to help you gain a greater understanding into the complexities of pressure prediction and the effects of pressure on the hydrocarbon system.

Due to the advanced nature of this course we recommend that participants have attended “Pressures and Overpressure in the Subsurface”, a similar pressure-related course or have a good working knowledge of oilfield practices and pressure prediction.

Show Course Outline
Pressure Refresher
  • Pressure Data, Pressure Gradients & Transition Zones
  • Reservoir vs. Shale Pressure
  • Overpressure Mechanisms
  • Pore Pressure Prediction
  • Vertical stress
Refinement of Existing Models
  • Effective stress
  • Compaction process
  • Overlay methods, Athy (1930), Hubbert and Ruby (1953)
  • Eaton Ratio Method and limitations
  • Equivalent Depth Method and limitations
  • Bowers Loading
Elastic & Inelastic Unloading processes
  • Reactive Systems (Hot Shales)
  • Elastic; “Fluid Expansion”
  • Inelastic; “Framework collapse”
Comparison of Existing Methods
  • An overview of several established pore pressure prediction equations
Basin Modelling
  • Introduction
  • What is a basin model?
  • Why use basin modeling?
  • Building the geological model
  • Mechanisms, permeability etc.
  • Upscaling
Typical Problems in Pore Pressure Prediction & Their Solutions
  • Soil mechanics approach to differing shale types
  • Carbonates & Salt
  • Uplift & Gas expansion
  • Lateral drainage & Hydrodynamics
Lateral Transfer & The Centroid
  • What is Lateral Transfer?
  • Dynamic vs. Static models
  • Case Study: Popeye-Genesis, GoM
  • 1D vs 2D modeling for the effects, SE Asia & North Sea
Seismic Pore Pressure Prediction
  • Why do we need seismic velocities?
  • How do we obtain these velocities?
  • How do we well-tie?
  • Understanding when an offset well is an offset well
  • Limitations of using seismic data
  • Constraint results by simple geological models
Fluid Retention Depth
  • Using a geologically driven method – the “Swarbrick Method”
Seal Breach & Trap Integrity
  • Membrane vs. Mechanical leakage
  • Shear vs. Tensile Failure
  • Previous Studies – Risking Schemes
  • Best-Practice Workflow
  • Case Study – North Sea HP/HT trap
Upcoming Schedule
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Instructors for this Course

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