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Reservoir Performance of Horizontal Wells

Djebbar Tiab, Ph.D.
Descripción del instructor

Is a Professor of Petroleum Engineering at the University of Oklahoma (OU). He received his B.Sc. (May 1974) and M.Sc. (May 1975) degrees from the New Mexico Institute of Mining and Technology, and Ph.D. degree (July 1976) from the University of Oklahoma - all in Petroleum Engineering, with a minor in mathematics. He served as the Director of the OU – Sonatrach “Graduate Program in Petroleum Engineering in Algeria” from 1996 to 2005. As a researcher at the University of Oklahoma, Dr. Tiab received several research grants and contracts from the National Science Foundation (NSF), United States Department of Energy, U.S. Department of HEW, SONATRACH, KOC, Oklahoma Mining and Mineral Resources Institute, EPSCoR and the Energy Resources Institute. He is a member of the U.S. Research Council, Society of Petroleum Engineers (SPE), Core Analysis Society, Pi Epsilon Tau, Who is who and American Men and Women of Science. He served as a technical editor of various SPE, Egyptian, Kuwaiti and U.A.E. journals. He was member of the SPE Pressure Analysis Transaction. He also served as a member of the University of Oklahoma Senate. He has served as a member of the College of Engineering Dean’s Advisory and as Chairman of the Ad hoc PGE Graduate Program Committee. In 2001 he was elected to the SPE Twenty-Five Year Club. Dr. Tiab is the author/co-author of over two hundred (200) conference and journal technical papers in the area of pressure transient analysis, dynamic flow analysis, Petrophysics, natural gas engineering, reservoir characterization, reservoir engineering and injection processes. In 1975 (M.S. thesis) and 1976 (Ph.D. dissertation) Tiab introduced the pressure derivative technique, which revolutionized the interpretation of pressure transient tests. He developed patents for CORE LAB in the area of reservoir characterization (identification of flow units). He is the senior author of the textbook “PETROPHYSICS”, published by Gulf Publishing Company: 1st Edition in October 1996; 2nd updated edition was published by Elsevier in January 2004. He is also working on the 3rd edition to be published in 2010, and on another manual titled “Horizontal Wells - Reservoir Performance”. He has co-authored three research books entitled “Productivity Equations for Oil Wells”, “Petroleum Reservoir Characterization – Interwell Connectivity”, published in June and July 2009 by VDM Publishing House, and “Analytical Solutions to Productivity and Pressure Transient Equations” published by VDM & LAP Lambert Academic Publishing AG& Co., August 2010. Dr. Tiab supervised one hundred forty research projects at the University of Oklahoma and two at Core Laboratories. These research projects formed the basis of 29 Ph.D. dissertations and 123 M.Sc. theses. The research projects covered all aspects of Petroleum Engineering including reservoir engineering, reservoir characterization, enhanced oil recovery and production. Most of his Ph.D. students are now consultants and/or professors at universities in the U.S.A., South America, Africa, Asia and the Middle East. The majority of his MS students (82) are currently working for Sonatrach in Algeria. He received the Outstanding Young Men of America Award (1983), the SUN Award for Education Achievement (1984), Kerr-McGee Distinguished Lecturer Award (1985), the College of Engineering Faculty Fellowship of Excellence (1986), the Halliburton Lectureship Award (1987-89), the UNOCAL Centennial Professorship (1995-98), and the P&GE Distinguished Professor (1999 – 2000). The UNOCAL Professorship was created to honor the one-hundredth anniversary of the University of Oklahoma. He received the 2007 USCO Recognition Award for Outstanding Technical Achievements. He received the prestigious 1995 SPE Distinguished Achievement Award for Petroleum Engineering Faculty. The citation read, “He is recognized for his role in student development and his excellence in classroom instruction. He pioneered the pressure derivative technique of well testing and has contributed considerable understanding to petrophysics and reservoir engineering through his research and writing.” Dr. Tiab has been elected in October 2002 to the Russian Academy of Natural Sciences as a member because of “His outstanding work in petroleum Engineering”, and was awarded the Kapista gold Medal of Honor for “His outstanding contributions to the field of engineering.” He received the 2003 SPE Formation Evaluation Award for “Outstanding achievements in petrophysics and reservoir engineering.” He is nominated for the 2010 SPE Reservoir Engineering Award.


Fecha indefinida



This course stresses practical reservoir engineering concepts essential to predicting the performance of horizontal wells, with a special emphasis on:


  • Role of geology in selecting optimum site for drilling a horizontal well
  • Interpretation of pressure transient tests in oil and gas reservoirs
  • Performance of Hydraulically fractured horizontal wells
  • Performance of horizontal wells in Naturally fractured reservoirs
  • Illustrate interpretation techniques by solving a large number of exercises



At the end of this course, the participants will be able to do the following: 


  • Select optimum geological setting for horizontal well placement
  • Interpret pilot-hole tests
  • Understand the fundamental theory and applications of well test analysis to horizontal wells;
  • Use modern techniques for analyzing drawdown and buildup test in Horizontal wells;
  • Evaluate and forecast horizontal well production performance with and without hydraulic fractures
  • Assess the productivity of Horizontal Wells
  • Decide on whether to fracture a vertical well or drill a horizontal well
  • Apply the knowledge and skills in their job assignments upon course completion.



 Petroleum and Geological Engineers who want to:


  • know how to use geologic information to select the optimum site to drill a horizontal well
  • Understand well testing principles unique to horizontal wells
  • Apply advanced modern interpretation techniques to analyze complex problems related to the pressure behavior of horizontal wells in hydraulically and/or naturally fractured oil and gas reservoirs
  • Know how to stimulate horizontal wells and assess post-fracturing performance.
  • Use common interpretation methods for calculating productivity of horizontal wells.

Previous experience in basic reservoir engineering and basic understanding of fluid flow equations is helpful.






  • Overview of Horizontal Well Drilling & Completions (Video)
  • Geological Aspects of Horizontal Wells
  • Horizontal well applications
  • Limitations of Horizontal Wells
  • Conventional Analysis of a Vertical Pilothole -Test
  • Modern Techniques for Evaluating Pilothole Test
  • Partially Penetrated/Completed PilotHole
  • Vertical Permeability from MDT
  • Exercise



  • Fundamentals of Well Test Analysis (Video)
  • Analysis of a Pilot-Hole (Vertical) Well Test
  • Partially Penetrating Well
  • Flow Regimes and Analytical Solutions
  • Flow Time Equations and Solutions
  • Pressure Drawdown and Buildup Testing in HW
  • Application of Pressure Derivative (Video)
  • Analytical/TDS Technique for Horizontal Wells
  • Determining Average Reservoir Pressure in HW
  • Exercise



  • Effect of Slant on Pressure-Transient Responses
  • Flow Regimes
  • Models Used in Well-Test Analysis of Slanted Wells
  • Skin and Pseudo-skin
  • Wellbore Storage
  • Calculation of Reservoir Properties
  • Exercises



  • Effect of Vertical Permeability on HW Performance (Video)
  • Horizontal well versus hydraulically fractured vertical well
  • Formation damage for horizontal wells
  • Matrix stimulation
  • Steady-State Flow Equations of horizontal wells
  • Unsteady-State Flow Equations
  • Horizontal Well Productivity
  • Effective Wellbore Radius for Horizontal Oil Wells
  • Effect of Formation Damage on HW Productivity
  • Pseudo-steady state flow Equations and Solutions
  • Pseudo-steady State Productivity Calculation Methods
  • Shape factor of horizontal wells
  • Coning in Vertical & Horizontal Wells
  • After Breakthrough Performance
  • Exercise



  • Fundamentals of Stimulation: Fracturing, Acidizing (Video)
  • Objectives of Hydraulic Fracturing
  • Limitations of Hydraulic Fracturing in Vertical Wells
  • Matrix Stimulation/Hydraulic Fracturing
  • Performance of Hydraulically Fractured Horizontal Wells
  • Objectives and Practical Considerations Prior to Fracturing
  • Post-Frac Conventional Pressure Testing
  • Application of Modern WTA Techniques in Fractured Wells
  • Finite Conductivity Fracture
  • Productivity of Multi-Fractured Horizontal Well
  • Exercises



  • Properties of Naturally Fractured Reservoirs (Video)
  • Objectives of HW in Naturally Fractured Reservoirs
  • Types and Evaluation of Naturally Fractured Reservoirs
  • Analysis of a Pilot-Hole (Vertical) Well Test
  • Pseudo-steady state and matrix flow in Horizontal wells
  • Anisotropic Reservoirs
  • Elliptical Flow
  • Average Reservoir Pressure of NFR
  • Exercises



  • Gas Reserves: Volumetric Methods, Material Balance Methods
  • Unsteady State Flow Equations
  • Real-Gas Pseudo Pressure, Non-Darcy Flow Equations
  • Pressure and Pressure Squared
  • Converting Pressure to Pseudo-pressure
  • Analysis of a Pilot-Hole Gas Well Test
  • Hydraulically Fractured Pilot Hole Test
  • Productivity of Horizontal Gas Wells
  • Pseudo-steady State Gas Flow Equations for HW
  • Steady State Gas Flow Equations for HW
  • Exercises 

"Este curso hace parte del programa especial de capacitación: Diplomado en Ingeniería de Yacimientos". La participación en el diplomado es opcional y no constituye un requisito para tomar este curso.

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