Advances in Well Testing and Wireline Formation Testing

Reservior Description and Dynamics


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 agenda (pdf)
Course brochure (pdf)

Learning Level


Course Length

2 Day

Why Attend?

  • 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

Who Should Attend

This advanced course is for reservoir engineers who already have experience in the field


Engineers are responsible for enhancing their professional competence throughout their careers. Licensed, chartered, and/or certified engineers are sometimes required by government entities to provide proof of continued professional development and training. Training credits are defined as Continuing Education Units (CEUs) or Professional Development Hours (PDHs).

Attendees of SPE training courses earn 0.8 CEUs for each day of training. We provide each attendee a certificate upon completion of the training course.


Professor George Stewart was a founding member of the Petroleum Engineering Department at Heriot-Watt in 1975 and was the second Head of Department in 1982-87.  He also was a founder of EPS Ltd and was Chairman from 1987-2004.  In 1976 he was Visiting Professor at the University of Texas at Austin and from 1978-1982 Senior Reservoir Engineer with Schlumberger where he specialised in Wireline Formation Testing.  He has published many papers on well and formation testing and deliveres courses throughout the world.  Currently he is Chief Reservoir Engineer for Weatherford Petroleum Consulting and Professor at Heriot-Watt.  Recently he has authored two textbooks published by Pennwell: “Well Test Design and Analysis” and “Wireline Formation Testing and Well Deliverability”.