Well Log Interpretation - WLI
Discipline: Petrophysics
Level: Foundation
Instructors who teach this course:
  • Mr. Eric A. Foster ,
    Mr. Eric A. Foster
    ERIC A. FOSTER, P. Geol., is a Geoscience Advisor/Instructor with PetroSkills based in Houston with 36 years of operations and management experience in the oil and gas industry. His background includes all aspects of formation evaluation and the application of software to geological and drilling engineering data acquisition and interpretation. He has acted as a technical advisor /consultant on projects throughout the world, and has extensive experience in the design and delivery of training programs. Previously, he was with Landmark responsible for managing Geoscience and Engineering consultants, representing Geological, Geophysical and Petrophysical software applications and services for global operations. He was an instructor of petroleum technology at Mount Royal College and SAIT in Calgary and in-house for Amoco. He is a registered Professional Geologist and is a member of APEGGA, AAPG, SPE and SPWLA. He served as Publications Chairman and on symposium committees for the CWLS, co-authored the paper on computer data formats (LAS) and has compiled numerous technical papers and training courses. He is a certified tutor for online learning and received a B.Sc (Hons). in Geology, from the University of London.
  • Mr. Paul S. Gardner ,
    Mr. Paul S. Gardner
    PAUL S. GARDNER has over 30 years of experience in the oil and gas industry in a number of capacities within research and operational organizations. He is an instructor for sessions associated with Petrophysics and Well Log Analysis. His expertise spans most aspects of petrophysics and reservoir characterization, and he has carried out, or been part of a team completing numerous projects in a variety of geologic environments. He was the founder of the petrophysical organization at Marathon's Petroleum Technology Center. He has also held a number of management positions associated with reservoir characterization, petrophysics, and technology integration.

    He has served in a number of capacities associated with technology identification and advancement including the Board of Directors for the Research Partnership to Secure Energy for America, the Technology Screening Committee for the Houston Technology Center, and he was a member of the Rice Alliance for Innovation and Entrepreneurship. He received a Bachelor's Degree in Geology from Colorado State University, is a member of SPWLA and SPE, and is a registered Professional Geoscientist in the State of Texas.

  • Mr. Roberto Peveraro ,
    Mr. Roberto Peveraro
    ROBERTO PEVERARO is a petroleum geoscience and engineering consultant with over 38 years experience in the oil industry, including senior technical management positions in formation evaluation, rock physics and borehole geophysics. Before founding Petrocomp Consulting, Ltd., he worked at Schlumberger and BNOC BRITOIL BP, where he held various senior level executive positions.

    In addition to having extensive technical authorship and publications, he is a senior member in IEEE, SEG, SPE, and SPWLA, a Recipient of SPWLA 2002 Distinguished Technical Achievement Award for Significant Technical Contributions in Formation Evaluation, and a Founder member of European Association of Petroleum Geoscientists and Engineers. He received both graduate and postgraduate degrees in Engineering Physics, and Applied Physics and Geophysics from Technical University Darmstadt, Germany.



  • Dr. E. C. Thomas
    Dr. E. C. Thomas
    DR. ESTES C. THOMAS served Shell Oil Company in various assignments for 32 years and retired as a Petrophysical Engineering Advisor. He formed Bayou Petrophysics in 1999 and currently consults part-time and provides technical training in shaly sand analysis and other areas of Petrophysics, and serves the SPE and SPWLA as a technical editor in various assignments. His professional career interests and publications have spanned many topics including development of revolutionary core analysis methods for handling and measuring the petrophysical properties of unconsolidated sands; pioneering the use of SEM techniques to study the pore structure and pore wall geometry and physical chemistry of shaly sands; empirical verification of the Waxman-Smits model for interpretation of resistivity behavior in homogeneous oil-bearing shaly sands; empirical quantification of the relationship between membrane potential and cation exchange capacity in shaly sands; development of models to interpret wireline logs and predict performance in laminated shaly sands. His most recent research interests involve methods to improve the performance of wireline formation sampling tools. He has received numerous awards and has presented many keynote addresses for the SPE and SPWLA. In 2004 E.C. was presented SPWLA's highest award, the Gold Medal for Technical Achievement. He received a Ph.D. in Physical Chemistry from Stanford University, performed Post Doctorate studies in Physical Chemistry at Princeton University, and received a B.S. in Chemistry from Louisiana State University.







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About the course Designed For You will learn Course Content
About the course
The most universal, comprehensive and concise descriptive documents on oil and gas wells are logs. They impact the work of almost every oilfield group from geologists to roustabouts to bankers. Familiarity with the purposes and optimum applications of well logs is therefore essential for people forging their careers in the oil business. The instructor uses a novel approach to help participants develop a good grounding in understanding and applying well logging techniques. General principles of physics are developed to explain the functioning of modern logging tools. Wherever possible, the physics of logging measurements is related to everyday tools and appliances. Participants develop an appreciation for the constraints and limitations of operating in the borehole environment. A number of actual log examples are related to basic principles in the description of reservoir properties such as porosity, mineralogy, formation factor, saturation, and hydrocarbon type, for essentially clean reservoirs. Cross-plotting and reconnaissance techniques (the eyes of the part-time log interpreter), quickly and efficiently discriminate between water, oil, and gas. Error minimization techniques, applicable only to computerized log analysis, produce optimal results. Participants gain realistic experience by working in teams on a comprehensive log interpretation exercise.
Designed For
Petrophysicists, geologists, geophysicists, engineers, technicians, or anyone interested in a solid understanding of the principles of borehole geophysics
You will learn
  • Participants will learn how to:Identify reservoirs
  • Determine mineralogy, porosity and saturation in various lithogies
  • Recognize the importance of electrical properties of earth materials
  • Highlight oil mobility
  • Interpret pressure profiles
  • Develop optimum tools and logging programs
  • Apply quickbook methods of formation evaluation
Course Content
  • Logging objectives
  • Invasion profile
  • Challenge of borehole geophysics
  • Passive electrical properties of earth materials
  • Resistivity measuring tools, normal, induction, laterolog
  • Reservoir/non-reservoir discrimination
  • Matrix-sensitivity logs, GR, SGR, Pe
  • Depth measurements and control
  • Borehole calipers
  • Porosity-mineralogy logs, density, neutron, sonic
  • Porosity determination in clean formations
  • Formation resistivity factor
  • Conductivity of shales
  • Porosity log crossplots and mineralogy identification
  • Partially saturated rock properties and Archie Equation
  • Linear movable oil plot
  • Reconnaissance techniques, Rwa, FR/FP, logarithmic scaler
  • Logarithmic MOP
  • Porosity-resistivity crossplots
  • Permeability relationships
  • Nuclear magnetic resonance
  • Use of pressure measurements
  • Computerized log evaluation
  • Sidewall coring
  • Recommended logging programs
Well Log Interpretation - WLI
Discipline: Petrophysics
Level: Foundation
Instructors: Eric Foster, Paul Gardner, Roberto Peveraro, E. C. Thomas
The most universal, comprehensive and concise descriptive documents on oil and gas wells are logs. They impact the work of almost every oilfield group from geologists to roustabouts to bankers. Familiarity with the purposes and optimum applications of well logs is therefore essential for people forging their careers in the oil business. The instructor uses a novel approach to help participants develop a good grounding in understanding and applying well logging techniques. General principles of physics are developed to explain the functioning of modern logging tools. Wherever possible, the physics of logging measurements is related to everyday tools and appliances. Participants develop an appreciation for the constraints and limitations of operating in the borehole environment. A number of actual log examples are related to basic principles in the description of reservoir properties such as porosity, mineralogy, formation factor, saturation, and hydrocarbon type, for essentially clean reservoirs. Cross-plotting and reconnaissance techniques (the eyes of the part-time log interpreter), quickly and efficiently discriminate between water, oil, and gas. Error minimization techniques, applicable only to computerized log analysis, produce optimal results. Participants gain realistic experience by working in teams on a comprehensive log interpretation exercise.
Who should attend:
Petrophysicists, geologists, geophysicists, engineers, technicians, or anyone interested in a solid understanding of the principles of borehole geophysics
You will learn:
  • Participants will learn how to:Identify reservoirs
  • Determine mineralogy, porosity and saturation in various lithogies
  • Recognize the importance of electrical properties of earth materials
  • Highlight oil mobility
  • Interpret pressure profiles
  • Develop optimum tools and logging programs
  • Apply quickbook methods of formation evaluation
Topics Covered:
  • Logging objectives
  • Invasion profile
  • Challenge of borehole geophysics
  • Passive electrical properties of earth materials
  • Resistivity measuring tools, normal, induction, laterolog
  • Reservoir/non-reservoir discrimination
  • Matrix-sensitivity logs, GR, SGR, Pe
  • Depth measurements and control
  • Borehole calipers
  • Porosity-mineralogy logs, density, neutron, sonic
  • Porosity determination in clean formations
  • Formation resistivity factor
  • Conductivity of shales
  • Porosity log crossplots and mineralogy identification
  • Partially saturated rock properties and Archie Equation
  • Linear movable oil plot
  • Reconnaissance techniques, Rwa, FR/FP, logarithmic scaler
  • Logarithmic MOP
  • Porosity-resistivity crossplots
  • Permeability relationships
  • Nuclear magnetic resonance
  • Use of pressure measurements
  • Computerized log evaluation
  • Sidewall coring
  • Recommended logging programs