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Oil and Gas Recovery Factors in Clastics and Carbonates

Who should attend:

Reservoir engineers with a few years practical experience.

Overview:

About 60% of the oil and gas reserves in the world's giant fields occur in the clastics (sandstone) reservoirs and about 33% of the reserves occur in the carbonate. Hydrocarbon recovery from these two fundamentally different formation types needs a good understanding in terms of their geological architecture and the associated displacement processes. It is not only hydrocarbon recovery estimates, but field development planning and uncertainty management also need to be tailored to reflect the formation types and their characterization. Since the applied fluid flow equations and recovery estimation techniques, in general, are not formation specific field cases (analogue) and experience play an important role in reserves assessment.

Content:

This course will cover the following:

  • The role and influence of geological environments on oil and gas reservoirs.
  • Basic understanding of clastics and carbonates and reservoir characterization.
  • Porosity and permeability distribution and associated displacement processes.
  • Understanding of relevant reservoir parameters and fluid properties.
  • Volumetric hydrocarbon initially-in-place estimation techniques.
  • Concepts of drive mechanisms, hydrocarbon recovery processes and recovery factors.
  • Estimation of oil and gas recovery factors with respect to formation type and recovery mechanism.
  • Reserves estimations from historical production performance.
  • Field subsurface development including well spacing, secondary recovery methods, and horizontal vs. vertical well development.
  • Identification and acquisition of critical data.
  • Identification and management of subsurface uncertainties.
  • Field case studies and worldwide analogue

The primary focus of the 5-day course is to explain the underlying problems in dealing with clastics and carbonates and highlight the fundamental differences between them in terms of their reservoir architecture, permeability distribution, and overall reservoir production performance. The participants will get an understanding of critical parameters that impact on hydrocarbon recovery and gain knowledge related to theoretical basis and practical application of reservoir engineering techniques supported by field examples sourced through published technical literature.