Global Agency of Geosciences Experts

06-02 Borehole Imaging

Objectives

Who should attend

Profesionnals with a Scientific background.

Prerequisites

Background in Geosciences, petroleum geology or basic Petroleum Engineer knowledge

Duration

5 Session

Languages
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1
Session

Borehole imaging technology

Principles of measurement and applications of wireline and loggingdrilling imaging tools.

Most relevant imaging tool vs

  • geological environment
  • logging conditions
  • logging objectives

Image processing chain:

raw data to suitable for interpretation images

Wellsite inclinometry and image quality control

well site data of resistivity and acoustic imaging tools

common inclinometry and image acquisition problems

2
Session

Dipmeter computation and interpretation principles

dip algorithms, dipmeter tools, dips derived from image logs.

Structural and sedimentary dips

interpretation rules

dip data for structural applications

structural dip, faults, unconformities

sedimentary structures and heterogeneities

Structural Interpretation of borehole images

general workflow for structural analysis

structural dip, unconformities, faults and stress.

3
Session

Statistical tools

structural delineation from dips AND image logs

Schmidt stereonets

principle of dip stereonet

structural parameters from dip data

  • Fold axis,
  • Axial plane
  • relationship between fractures and bedding

Structural Interpretation of borehole images (cont. d)

Advanced stereonet techniques for 2D and 3D structural modeling from dips

dip derived structure models

structural models

3D seismic data in Petrel.

4
Session

Fracture, fault and stress characterization from BHI

Basics on rock mechanics

Rock failure mechanism

Faults, fractures

Cores and outcrops

Vertical and horizontal wells.

Fracture, fault and stress characterization from borehole images

stress related features on image logs

stress direction and intensity.

fracture contribution to reservoir permeability

fractures, faults and stress related features vs

  • Sonic
  • dynamic data.
5
Session

Sedimentary interpretation of BHI

General workflow for sedimentary analysis

image logs,

scales and definitions of sedimentary structures.

various depositional environments

  • Continental fluvial
  • Deltaic
  • Shallow marine
  • Deep marine
  • Eolian
  • Carbonate build-up
  • Glacial environments.

Textural information from BHI

combined with open-hole data

electro-facies in carbonate and clastic reservoirs.

principles of sequence stratigraphy

small scale resolution images to more robust sequence stratigraphy models

LECTURERS

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