This Reference Manual and Short Course cover topics needed for location of natural fractures from conventional open hole and image logs, as well as calculation of fracture intensity, fracture porosity, fracture related porosity, matrix porosity, water saturation, and permeability. The use of dipmeter analysis and image logs as well as integration and calibration to core data is stressed.

Item #RF-09: 90 pages, 6 chapters, detailed table of contents, computer-ready math.

Item #RF-09S: 1 narrated video slideshow, with lecture notes and exercises.

See Sample Videos HERE.

RECOMMENDED FOR: all geoscientists, geotechs, engineers, managers and CEO's.

RF-01 Crain's Petrophysical PocketPal    
RF-08 Crain's Analyzing Dipmeter and Image Logs

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1.00 Fractured Reservoir Basics
1.01 Definition of Fractures
1.02 Using Logs to Locate Fractures
1.03 Using Core Analysis to Locate Fractures
1.04 Other Methods for Fracture Location
1.05 Recommended Logging Program

2.00 Fracture Identification Basics
2.01 Fracture Identification From Resistivity Logs
2.02 Fracture Identification From SP Logs
2.03 Fracture Identification From Caliper Logs
2.04 Fracture Identification From Micro Resistivity Logs
2.05 Fracture Identification From Dipmeter Logs
2.06 Fracture Identification From Density, Neutron,PE Logs
2.07 Fracture Identification From Gamma Ray Logs
2.08 Fracture Identification From Temperature Logs
2.09 Fracture Identification From Sonic Logs
2.10 Fracture Identification From Sonic Waveform Logs

3.00 Fracture Identification From Resistivity Image Logs
Determining Fracture Strike and Dip Angle
Determining Stress Orientation
3.01 Fracture Identification From Acoustic ImageLogs

4.00 Classic Examples
4.01 Austin Chalk Example
4.02 Fractured Shale
4.03 Vertical Fracture in Vertical Hole
4.04 Vertical Fracture in Horizontal Hole

5.00 Log Overlays and Crossplots to Quantify Fractures
5.01 Calculating Permeability From Stoneley Attenuation
5.02 Calculating Formation Strength
5.03 Calculating Fracture Intensity (Crain’s Method)
5.04 Calculating Fracture Intensity and Initial Flow Rate (Schafer’s Method)
5.05 Calculating Fracture Porosity and Fracture Permeability from Fracture Aperture

6.00 Basic Resistivity Concepts in Fractured Reservoirs
6.01 The Double Porosity Model in Fractured Reservoirs
6.02 Water Saturation in the Double Porosity Model
6.03 Example of Dual Porosity Mel



  • Fractured Reservoirs Basics

  • Definition of Fractures

  • Locating Fractures With Conventional Logs

  • Locating Fractures With Image Logs

  • Case Histories

  • Quantifying Fractures

  • Calculating Fracture Intensity

  • The Double Porosity Model in Fractured Reservoirs

  • Exercise 12


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