Advanced Pressure Concepts - 3 Day Course

Available as a public course
Available as a private in-house 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.

Full 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

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