Worldwide Petroleum Consulting
Overview of Unconventional Resources: From Characterization to Resources/Reserves Estimation

Overview of Unconventional Resources: From Characterization to Resources/Reserves Estimation


Three or four days

Who Should Attend:   

Geoscientists, engineers, and managers who are interested in understanding the key characteristics of unconventional resource plays, factors that control productivity, how to analyze, model and forecast well performance, and estimation of reserves and resources for unconventional assets.

Learning Outcomes:

  • Understand the controls on in-place volumes and productivity
  • Identify effects of drilling/completion on well production
  • Estimate key reservoir and completion parameters using model-based production analysis
  • Forecast production using numerical, analytical, and decline curve techniques
  • Establish workflows to help quantify reserves and resources

Course Description:

Unconventional resource plays are becoming increasingly important contributors to the world’s energy output.  The purpose of this course is to provide practical insights for understanding productivity and well performance in unconventional resource plays, as well as for reserves and resources estimation for unconventional assets. The workshop presents an overview of fluid flow at the pore-scale, factors that control productivity, and the effects of completion practices. Various production analysis methodologies will be emphasized, from simple decline curve relations to more advanced numerical simulation models – which can be used to analyze, model and forecast well performance. The course concludes with approaches to reserves and resources estimation, and address key questions on determining proved area, 1P, 2P and 3P type curves, reserves classification, and reliable technology.

Tentative Course Contents:

  • Module 0: Introduction
    • Overview
    • Definitions
    • (North America) Production trends
  • Module 1: Overview of Subsurface Characterization
    • Fluid flow/storage in nanopores
    • Geochemistry
    • Petrophysical analysis/interpretation and geomechanics
    • Data requirements for evaluation
  • Module 2: Drilling and Completion
    • Drilling trends and hydraulic fracturing
    • Completion techniques and evaluation
    • Completion diagnostics
  • Module 3: Well Performance Analysis and Forecast
    • Background and orientation, historical work
    • PA objectives
    • Decline curve analysis
    • Production diagnostics (diagnostic plots, applications in shale, tight reservoirs)
    • Analysis by modeling (analytical solutions, numerical simulation)
    • Workflows/examples
  • Module 4: Resources and Reserves
    • PRMS — unconventionals
    • Prospective resources
    • Discovery test
    • Contingent resources assessment methodology
    • Reserves assessment in unconventionals


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PDF: Overview of Unconventional Resources

Instructor: Dr. Dilhan Ilk