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ICTD International Centre for Training and Development

Advanced Well and Wireline Formation Testing

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Description

Objectives of test, well testing in carbonate formations, effect of well acidisation, derivative diagnostics and applicable models, low permeability reservoirs, multiple natural or hydraulic fractures, fracture network models, linear flow regime, enhanced well testing including production logging, layered reservoirs, rate dependent skin in high rate gas wells, integration of well test and core analysis data, log permeability transforms, reconciliation of permeability estimates in tight gas, reserve estimation from well tests, field examples, transient well deliverability Procedure for tight reservoirs, supercharging correction, advanced invasion model, pressure-depth diagram, gradient interpretation, oil rim reservoirs, fluid PVT characterisation, new generation wireline formation testing, straddle packer module, mini-DST, integration with image logs, definition of thickness of tested interval, limitations of mini-DSTs, prediction of well deliverability, application of mini-DSTs in fractured reservoirs, examples from coal bed methane, exploration applications of pressure-depth data, differential depletion in produced reservoirs, material balance modelling, thin bed reservoirs, effect of cable creep on depth matching, importance of sampling.

This is an advanced course reviewing state-of-the-art topics in well test interpretation and wireline formation testing. In the case of well testing the main issues which will be covered relate to fractured and layered reservoirs. It will be demonstrated that dual porosity behavior is never seen in carbonate reservoirs and the actual form of derivative diagnostics conform to different models of the system where linear and radial composite flow occur. In the case of layered reservoirs the importance of production logging is emphasised and the integration of petrophysical and core analysis data is emphasised. Finally the question of reserve estimation from well testing is covered in detail.

Course Objectives

Upon successful completion of this course, the delegates will be able to:

  • To review and appreciate recent advances in the subject of Well Testing and Wireline Formation Testing
  • Discuss with a world authority in Wireline Formation Testing
  • To be expected to various field examples for many different reservoirs

Course Outline

Day 1

Advanced Well Testing Interpretation

  • Objectives of test
  • Well testing in carbonate formations
  • Effect of well acidisation
  • Derivative diagnostics and applicable models
  • Low permeability reservoirs
  • Multiple natural or hydraulic fractures

Day 2

Advanced Well Testing Interpretation (continuation)

  • Fracture network models
  • Linear flow regime
  • Enhanced well testing including production logging
  • Layered reservoirs
  • Rate dependent skin in high rate gas wells

Day 3

Advanced Well Testing Interpretation (continuation)

  • Integration of well test, petrophysical and core analysis data
  • Log permeability transforms
  • Reserve estimation form well tests
  • Field examples
  • Transient well deliverability

Day 4

Advanced Wireline Formation Testing

  • Procedure for tight reservoirs
  • Supercharging correction
  • Advanced invasion model
  • Pressure-depth diagram
  • Gradient interpretation
  • Oil rim reservoirs
  • Fluid PVT characterisation
  • New generation wireline formation testing
  • Straddle packer module
  • Mini-DST

Day 5

Advanced Wireline Formation Testing (continuation)

  • Integration with image logs
  • Definition of the thickness of tested intervals
  • Limitations of mini-DSTs
  • Prediction of well deliverability
  • Application of mini-DSTs in fractured reservoirs
  • Examples from coal bed methane
  • Exploration applications of pressure-depth data
  • Differential depletion in produced reservoirs
  • Material balance modelling
  • Thin bed reservoirs
  • Effect of cable creep on depth matching
  • Importance of sampling

Course Methodology

A variety of methodologies will be used during the course that includes:

  • (30%) Based on Case Studies
  • (30%) Techniques
  • (30%) Role Play
  • (10%) Concepts
  • Pre-test and Post-test
  • Variety of Learning Methods
  • Lectures
  • Case Studies and Self Questionaires
  • Group Work
  • Discussion
  • Presentation

Who should attend

This course is intended for all reservoir engineers, petroleum engineers, drilling engineers, wireline personnel, productions and who already have experience in the field.

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