# Well Testing & Well Test Analysis

WTA-EN-P

## Who should attend?

• This course provides a comprehensive and practical understanding about performing set-up, design and analysis of well tests.
Public :
• Newly-hired and 2- to 3-year experienced reservoir engineers willing to deepen their knowledge in well test analysis; 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.
To French entities : IFP Training is QUALIOPI certified ; you may contact your OPCO about potential funding.