Training

We provide specialised training courses in borehole image and dipmeter log interpretation for geologists, petrophysicists and geophysicists. The three day training course covers image log technology and practice (wireline and LWD), QC and processing, structural interpretation, sedimentological characterisation of clastic and carbonate rocks and in-situ stress analysis.

Task Geoscience runs both open invitation courses and closed courses for specific clients. Course locations are available worldwide in both cases. Courses can be customised to a client’s particular needs, but typically aim to provide attendees with an insight into how borehole images can assist in reservoir evaluation and the skills required to begin borehole image interpretation. For more information on the training we offer, please contact us or click here.

 

Borehole Image Data Processing & QC

  • Complete data loading (including all objects from DLIS tape)
  • Raw curve data checks (e.g. completeness, depth range, curve units, curve statistics)
  • Magnetometer and accelerometer quality control
  • Corrections and recalculation of orientation data
  • Tool offset information and correct application to all time based data
  • Correction for magnetic declination and relative bearing offset
  • Accelerometer corrections
  • Button repair
  • Button equalization

 

Formation Image Processing and Interpretation

  • The workshop will introduce borehole image log devices, its limitations and the methodologies used to analyze data for geological objectives in a reservoir
  • The course material used includes clastic successions with well developed cross-bedding, carbonate rocks with intense fracturing and also igneous reservoirs with both secondary porosity through weathering and fracture porosity
  • This 3-day course will include one day of tool and image analysis methodology and two days practice on examples of these reservoirs
  • The participant will interactively work with images from these reservoirs and will be guided by the instructors during their interpretation
  • The emphasis of this course will be placed on how image logs contribute to solving geological problems/questions in a reservoir

 

Structural Geology for Image Log Interpretation

  • Introduction to the qualitative and quantitative assessment of fractures of different scale (faults with significant offset, slickensides, joints and microfractures), focusing upon structural geology techniques suitable to support and enhance image interpretation
  • Classification of brittle faults and fractures in outcrop, core and log, considering the different scales of observation and resolution
  • Basic brittle structural geology techniques used for genetic fault interpretation and kinematic/dynamic fracture/fault analysis
  • Structural core analysis and the integration of core data with image logs
  • Characterization of the fractured matrix (microfractures, joints) carrying most of a fractured reservoir’s porosity
  • Assessment of fault zones, faults and fault rocks with respect to their contribution to reservoir characteristics

 

Stratigraphic Evaluation of Formation Images & Interpretation of Depositional Environments

  • Image quality control and “Interpretability”
  • Importance of understanding of the near-wellbore and regional structure to a stratigraphic interpretation
  • Overview of sediment surfaces, boundaries and interfaces with an introduction to sediment architecture
  • Methodical and practical Borehole Image Facies Scheme
  • Residual dips and sediment dispersal to assess palaeotransport and/or palaeoslope
  • Image facies and facies associations to help understanding of depositional environments
  • Terrestrial sediments: Aeolian, Fluvial, Lacustrine systems etc.
  • Coastline and Marine Sediments: Paralic Estuarine, Deltaic, Shoreface systems etc.
  • Deep Water Sediments. Turbidites, Debris Flows, Hemipelagic settling etc.

 

Fracture System Characterization

  • Fracture/fault identification and detailed analysis utilizing borehole imaging tools, including characterization of in-stress indicators
  • Integration with complementary data e.g. core, outcrop, seismic, petrophysical data and production data
  • Fracture connectivity analysis and fracture corridor recognition
  • Utilization of the detailed integrated results in 3D fracture modeling and dynamic reservoir models
  • Applications in well completion and placement

 

Carbonate Reservoirs and Borehole Image Analysis

  • Introduction to Carbonates: a review of carbonates and their terminology
  • Carbonates and Biology: life and death, reservoirs and tombstones
  • Carbonates and Physics: the mechanisms of sediment re-distribution
  • Carbonates and the Atmosphere/Hydrosphere: blowing hot and cold, wet and dry
  • Carbonates and Chemistry: simple reactions with complex results
  • Carbonates and Sequence Stratigraphy: the ups and downs of carbonate sediments
  • Carbonates and Reservoir Properties: combine all the above to explain reservoir behavior
  • Carbonates and Borehole Images: what images might tell us, and how can we use the information

 

Introduction to Geophysics

  • Overview of Geophysical Methods and their role in Hydrocarbon Exploration and Production
  • Seismic (1D through 4D) acquisition, processing and qualitative and quantitative amplitude interpretationElectromagnetics with emphasis on Deepwater Prospect Evaluation and Basement Mapping (Marine Controlled- Source Electromagnetics and Magnetotellurics)
  • Potential Fields with emphasis on Regional Exploration and Salt/Basalt Plays (Gravity and Magnetics)

 

Introduction to Reservoir Engineering

  • Reservoir Engineering Fundamentals
  • Reserve Estimates.
  • Fluid Flow through Porous Media
  • Well Performance
  • Reservoir Simulation Concepts and Applications
  • Improved Recovery Processes
  • Reservoir Management Concepts

 

Open Hole Logging

  • This course provides a basic background on open hole logs. and how to perform a quick look evaluation of water saturation and mineralogy
  • For each tool type there is a review of the general principles of physics to explain the functioning of the logging tool, and several work sessions on how to use these measurements in well log evaluation
  • Through a combination of discussions and work examples the class will learn how to integrate the quick look evaluation from open hole logs with data from borehole image logs, mud logs, seismic and core data, to develop a more complete understanding of the reservoir and how to use this data in formation evaluation

 

Subsurface Clastic Seismic & Sequence Stratigraphy

  • In-depth review and analysis of the principles and application of clastic sequence and seismic stratigraphy at basin and reservoir scale
  • Depositional sequences, stratigraphic surfaces, High Resolution Biostratigraphy, Seismic Signatures, Systems Tracts
  • Seismic Stratigraphic Methodology, Coastal Onlap Curves
  • Well-Log Sequence Stratigraphy
  • Integration of seismic and Well Log Sequence Stratigraphy with examples
  • Exercises on seismic and well log sequence stratigraphy, Wheeler diagrams and well log correlation