Structural and Stratigraphic Interpretation of Dipmeters and Borehole-Imaging Logs - SSI

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Dipmeters are micro-resistivity logs that detect the orientations of bed boundaries and borehole elongations. Borehole-imaging logs provide video, density, gamma-ray, acoustic and/or electrical images of the borehole face. Dipmeters and borehole images can be run in water-based or oil-based mud; on wireline or LWD. They are used structurally to detect, orient, and quantify natural, induced, and healed fractures, faults, fold axes, unconformities, and in situ stress. Stratigraphically, dipmeters and borehole images are used to identify paleo-current directions, bounding surfaces, facies, thin beds, net-sand, and secondary porosity. The key objective of dipmeter and borehole-image interpretation is to describe structural and stratigraphic features encountered by a wellbore, commonly in the absence of core. This course provides numerous hands-on exercises and case studies that emphasize sedimentologic, stratigraphic, and structural applications of these widely run, but generally underutilized logging tools.

Petrophysicists, geologists, geophysicists, reservoir and production engineers, all team members involved in reservoir characterization.

You will Learn:

Participants will learn how to:

  • Interpret dipmeters and borehole-imaging logs and understand the physical principles behind them
  • Detect and quantify faults and fractures, determine in situ stress orientations, improve horizontal well placement, provide input into flow simulations
  • Determine paleocurrent orientations, define stratigraphic compartments, quantify vuggy porosity, detect thin beds, apply image data in reservoir characterization

Course Content:

  • Applications and types of dipmeters and borehole images
  • Data acquisition and processing
  • Quality control and artifacts
  • Oil based mud and logging while drilling applications
  • Generation and use of stereonets and rose diagrams
  • Quantitative analysis using cumulative dip plots, vector plots, and SCAT plots
  • Fractures, faults, micro-faults, and unconformities
  • Sub-seismic scale faults
  • Determination of fracture spacing and fracture porosity
  • In situ stress from borehole breakout and drilling induced fractures
  • Thin bed analysis and net-sand counts
  • Carbonate porosity and facies interpretation
  • Application of image data in sequence stratigraphy
  • Sedimentology from borehole images: burrows, cross beds, scoured surfaces, slumps
  • Determination of paleocurrent directions
  • Interpretation of borehole images in various depositional settings
  • Reservoir characterization using borehole images
  • Integration with seismic, NMR, and production logs

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