Well Testing & Well Test Analysis

RENG/WELLTEST

Who should attend?

  • This course provides a comprehensive and practical understanding about performing set-up, design and analysis of well tests.
Audience :
  • Newly-hired and 2- to 3-year experienced reservoir engineers willing to deepen their knowledge in well test analysis. It is also intended for geoscientists, petroleum engineers and production engineers moving towards reservoir engineering.

Level : Proficiency

Course Content

  • INTRODUCTION TO WELL TESTING, BASIC EQUATIONS & METHODS

      • Objective of well testing.
      • Practical well test operations: types of tests, equipment, safety and environmental issues.
      • Definitions and typical flow regimes: radial flow, fractured reservoirs, limited reservoirs and closed reservoirs.
      • Productivity Index (PI), radius of investigation.
      • Darcy's law and the diffusivity equation.
      • Time superposition, multirate testing.
      • Space superposition, boundary effect.
      • Pressure curves analysis.
      • Pressure derivative curves analysis.
  • WELLBORE CONDITIONS

      • Wellbore storage and skin effects.
      • Infinite and finite conductivity vertical fracture.
      • Well in partial penetration.
      • Horizontal well.
      • Skin factors, geometrical skin and well deliverability.
  • RESERVOIR HETEROGENEITIES

      • Double porosity models: pseudo-steady state and transient state models.
      • Double permeability models.
      • Composite reservoir models.
  • BOUNDARY MODELS

      • One sealing fault model.
      • Two parallel sealing faults model/two intersecting sealing faults model.
      • Closed system model and reservoir limits testing.
      • Constant pressure boundary model.
  • TEST DESIGN - HANDS-ON SESSION

      • Rate history definition.
      • Time and pressure error.
      • Interpretation procedure.
      • From the initial diagnosis to the final consistency check of the results.
      • Reporting and presentation of results.
      • Examples of test response.
  • GAS WELLS: REVIEW & APPLICATIONS

      • Hypothesis for gas wells testing. Darcy and non-Darcy flow.
      • Pseudo-pressure and inertial effects.
      • Gas wells deliverability:
      • Absolute open flow potential.
      • Houpert method.
      • Back pressure tests. Isochronal tests. Modified isochronal tests.

Learning Objectives

  • Upon completion of the course, participants will be able to:
  • discuss the theory of well test analysis,
  • identify main flow regimes and models,
  • carry out simple well test analysis,
  • define or recommend a well test design.

Ways & Means

  • Interactive lectures and exercises.
  • Hands-on practice based on synthetic and real data using hand and spreadsheet calculations and SAPHIR™ dedicated industrial software.
  • Software used during workshops: with courtesy of Kappa Engineering.