Advanced Well Log Analysis & Interpretation
Well logs are detailed records of the geologic formations by a borehole. These are comprehensive and important data gathered in any phase of a well’s history to identify petrophysical properties which in turn define the economic value of a reservoir. The techniques in the analysis and interpretation of well logs are therefore essential in the identification of oil recovery.
In the E&P business, integrated petroleum engineering studies and field development plans are management tools that are used to maximize the economic recovery of hydrocarbons. Petrophysical engineers fulfill a key role in analyzing and interpreting subsurface reservoir data, which form the basis for reservoir models. E&P technical staff and team leaders involved in integrated studies require more than general skills in petrophysical and interpretation techniques to produce quality input to development plans.
The trainer will provide an understanding of practical and new techniques and tools in well-logging with the support of case studies. At the end of the course, participants will be able to quantitatively identify the reservoir quality, measure the storage capacity of the reservoir by integrating the reservoir and petrophysical data, and improve oil recovery.
DAY 1
Introduction to Petrophysics
The Rock Physical properties and the petrophysical parameters. These petrophysical parameters include:
- Porosity,
- Permeability
- The volume of shale,
- Fluid saturations.
Well Logging Tools include:
- Open-Hole Logging Tools.
- Logging While Drilling (LWD) Tools.
- Cased-Hole Logging Tools.
Open-Hole Logging Tools
- Definition, measurements, application, and equations of the following tools:
- Lithology Tools: Gamma Ray, Spectral Gamma Ray, Spontaneous Potential Tools
- Porosity Tools: Sonic, Density, Neutron Tools
- Resistivity Tools: Dual-Latero, Dual-Induction, Micro-Spherical Resistivity Tools
Case study: The effect of shale volume
Exercise: Determination of petrophysical parameters
DAY 2
Logging Operations and Quality Control
- Logging Tools Operations
- Log Quality Control
Introduction to Logging While Drilling (LWD)
- Lithology Tools
- Resistivity Tools
- Porosity Tools
Quick Look Well Log Interpretation:
- Lithology interpretation
- Porosity calculations
- Rw determination and Petrophysical parameters (a,m,n)
- Vshale estimation
- Fluid Saturation
- Permeability
- Permeability & Porosity relationship
Formation Evaluation
- Porosity Types
- Total Porosity and Lithology Interpretation
- Rw determination methods and Petrophysical parameters (a,m,n)
- Effective Porosity and Vsh Determination
- Fluid Saturation, Archie’s Relationship, and other Saturation Equations.
- Permeability.
Case study: Calculation of the petrophysical parameters
Exercise: Calculation of the fluid saturation
DAY 3
Other Open-Hole Logging Tools:
- Definition, measurements, application:
- Electromagnetic Propagation Time Tool and Diameter.
Case study: EPT log example
Exercise: Calculate Variable ‘m’ from the EPT equation
Recent and Advanced Tools:
- Geological Tools: FMS, FMI
- Magnetic Resonance Tools: NMR, CMR
Case study: FMI log example
Exercise: Differentiate between these different structural elements.
Case study: CMR log
Exercise: Define free hydrocarbon and away from the bound fluid
Open and Cased-Hole Logging Tools:
Pressure Tools
- Principles and interpretation of the other open hole logging tools which can be run in cased holes:
- Repeat Formation Tester (RFT) tool
- Modular Formation Dynamics Tester (MDT)
For:
- Determine static reservoir pressure
- Locate formation fluid contacts
- Verify reservoir isolation.
- Indicate reservoir depletion.
- Calculate reservoir permeability.
Case study: RFT / MDT log example
Exercise: Differentiate between the different gradients of different types of fluids
Open and Cased-Hole Logging Tools:
- Principles and interpretation of cased hole logging tools which can be run in open holes:
- Thermal Decay Time tool (TDT)
- Reservoir Saturation tool (RST)
For:
- Monitoring Fluid Contacts
- Reservoir monitoring.
Case study: TDT / RST log example
Exercise: TDT log example using open-hole logging data
DAY 4
Cased-Hole Logging Tools
- Definitions, Measurements, Applications, Equations
- Cement Bond (CBL) & Variable Density (VDL) log:
- Principles and interpretation of Cement Bond (CBL) & variable
- Density (VDL) tool for zone-to-zone isolation and reservoir monitoring
- Applications to field development.
- Cement Bond (CBL) & Variable Density (VDL) log:
- Cement Bond (CBL) & Variable Density (VDL) log details:
- Principle of Operation
- Basic Sonic Theory
- Cement Bond Log (CBL)
- Variable Density Log (VDL)
- Quantitative Interpretation of CBL and Qualitative Interpretation of VDL using: CBL – VDL Log Example
-
For:
- Evaluate zone-to-zone isolation:
- Cement coverage of casing for corrosion protection, mechanical strength
- Identify cement top
- Evaluate cement repair jobs
- The Rig Cementing and Remedial cementing works using CBL /VDL results related to Petrophysics and Reservoir Monitoring.
- Well completion related to perforation intervals according to CBL / VDL results.
Case study: CBL / VDL log example
Exercise: Perforation intervals and top of cement by using the CBL /VDL log example.
- Production logging (PLT) log:
- Principles and interpretation of production logging tools (PLT):
- Applications to field development.
- Production logging (PLT) log includes:
- Fullbore – Spinner, continuous, or packer Flowmeters.
- Gradiomanometer.
- Manometer.
- Thermometer
- Caliper & Radioactive Tracer
- For:
- Evaluation of completion efficiency.
- Detailed information on which perforations are plugged and which are producing or accepting.
- Monitoring of reservoir production.
- Evaluation of reservoir production or injection efficiency.
- Essential guidance for Remedial and Workover, jobs
Case study: PLT log example
Exercise: Determine the perforation
DAY 5
Advanced Formation Evaluation
- Reservoir Petrophysical Model Evaluation:
- Reservoir Characteristics:
- Modern Approaches and Techniques in Petrophysics
- Multi-Well Bases Study Using:
- Multi-Well Data-Base
- Key Well Study
- Data Normalization
- Variable Petrophysical Parameter values
- Standardization of Petrophysical Parameter
- Lithology Determination
- Lithology Model
- Lithological Parameters
- Petrophysical Parameters Determination
- Archie’s Parameters
- Most Problematic Parameters
- Old Methods (Constant Value)
- New Methods (Variable Values)
- Introduction to Computer Processed Interpretation using:
- Practical Training Exercises for:
- Hydrocarbon Quality
- Fluid Contacts (GOC-GWC-OWC-ODT-WUT-FWL)
- Reservoir Summations
- Applications to field Development
Cases Studies Including
- Carbonate reservoir (Limestone)
- Clastic reservoir (Sandstone)
- Gas Sandstone reservoir
Cases studies: Including Carbonate and Clastic Reservoirs
Case study – 1: Reservoir Petrophysical Modeling
Case study – 2: Unconventional Reservoir Example
Case study – 3: Unconventional Reservoir Examples
Case study – 4: Rock Typing
Examples with different contacts (OWC, GWC, and Gas / Oil / Water contacts)
Exercises
Practical Training Examples:
Raw Log Data for Quick Look Interpretation and Formation Evaluation.
What is Advanced Well Log Analysis & Interpretation training course objective?
- Drive consistent and effective Petrophysics inputs to improve oil recovery
- Understand rock properties and pore geometry
- Capitalize on integration reservoir and petrophysical data to maximize economic recovery of hydrocarbons
- Attain the knowledge and practical use of total and effective porosity calculation
- Determine and understand new techniques and tools in well logging
- Acquire knowledge of permeability and rock quality interpretation
- Learn and practice the integration of core analysis and open-hole logs
Who should join Advanced Well Log Analysis & Interpretation training course by PetroSync?
- Well Logging Analysts and Petrophysicists,
- Petroleum, Production, and Reservoir Engineers,
- Field Operations and supervisors,
- Geoscientists involved in field development and other E & P professionals.
Prof. Dr. Ahmed Taha Amin
Prof. Dr. Ahmed Taha Amin is an expert in formation evaluation, core analysis and reservoir modeling. He has broad experience working with assets and providing properties for reservoir characterisation and strong experience with carbonate petrophysics over 15-years experience.
He has extensive experience over 45 years in industry, principally in log analysis and Formation Evaluation in various technical and managerial positions for Gupco (Cairo, Egypt), Adco and Adnoc (Abu Dhabi, UAE), QGPC (Doha, Qatar), Apache (Cairo, Egypt), RPS Energy (in UK) and CEPSA in Egypt.
He is an instructor for Basic, Intermediate, Advanced Petrophysics, Core-Log Integration, Image Interpretation, IP software Application and LQC for Data Management training courses. He was supervised the Petrophysical studies and Wire-Line operations for Apache Egypt operated by: APACHE, QARUN and KHALDA Companies for 10 years. He did Petrophysical Evaluation projects in a few countries such as Algeria, Egypt, Yemen, Kuwait, Madrid, South Africa and East Asia.
