Spectrum 2000

SPECTRUM 2000 COURSE OUTLINE
c. 1978 - 2008 E. R. (Ross) Crain, P.Eng.
Rocky Mountain House, Alberta Canada T4T 2A2
403-845-2527 email usail
Updated 15 Oct 2007

Session FIVE – ROCK MECHANICS and ELASTIC PROPERTIES
Course Outline and Instruction Materials c. 1978 - 2008 E. R. (Ross) Crain, P.Eng.

Integrated Courseware Connecting Logs, Cores, Tests, Productivity, Cash Flow, and Seismic Petrophysics - Since 1973

Students in this class will have some experience with logs, but need a clear understanding of elastic properties of rocks for stress analysis, hydraulic fracture design, and seismic petrophysics. The seminar is supported by "Crain's Mechanical Properties" (50 pages) reference manual and exercises, a high quality PowerPoint presentation, and 1 day of instruction.

DURATION: 1 day - 8 Professional Development Hours (PDH)

DESIGNED FOR: Anyone who works with logs for stress studies, stimulation design, or seismic petrophysics, or who wants to do more with their logs, or who works with other people who use logs:

Exploration and Production Geologists
Reservoir and Development Engineers
Stimulation, Production, Completion, Workover Engineers
Log Data Processors and Analysts
Exploration Geophysicists and Data Processors
Geological, Geophysical, or Engineering Technologists
Hydraulic Fracture Engineers
Managers and Entrepreneurs
Service Company and Consulting Personnel

SUMMARY: This quantitative course covers all topics needed to calculate dynamic elastic properties, Poisson’s Ratio, Young’s Modulus, overburden stress, pore pressure, and closure stress. Integration and calibration to static and dynamic lab data are stressed.

BENEFITS:

provides understanding of the elastic properties model for log analysis
provides step-by-step procedures for calculations
provides "computer ready" mathematics
gives insight into rock quality versus fracture performance
provides exercises and worked examples for further study
permanent reference material

COURSE OUTLINE:

0 Introduction
1 Elastic Constants Theory
2 Calculating Mechanical Properties Of Rocks
      0. Correcting High Frequency Sonic (Lab) Data
    1. Correcting Density and Sonic Data for Gas
      2. Shear From Stoneley Travel Time
      3. Shear Modulus N
      4. Poisson's Ratio PR
      5. Bulk Modulus Kb
      6. Bulk Compressibility Cb
      7. Biot’s Constant Alpha
      8. Young's Modulus Y
      9. Modulus of Compressibility Kc
    10. Pore Compressibility Kp or Kf

3 Calibrating Dynamic to Static Constants
4 Examples of Mechanical Properties Logs
5 Calculating Overburden Pressure Gradient
6 Calculating Normal Pore Pressure Gradient
7 Calculating Abnormal Pressure Gradient
8 Calculating Fracture Pressure Gradient
9 Calibrating Fracture Pressure Gradient
10 Calculating Fracture Extent
11 Gamma Ray Logging to Confirm Fracture Placement
12 Fracture Orientation from Caliper and Dipmeter Logs
13 Tables of Rock Properties
14 In Conclusion
15 Exercises