Review of Well Injection Tests

Mr. Saad Ibrahim, P. Eng
(1 day) – TBA

Course Objective:

The purpose of this one-day course is to offer a complete coverage the various injection tests conducted in the industry; their applications and how to analyse test data.  Injection tests are conducted for: 1. water disposal and injection wells. 2. Steam injection wells. 3. Subsurface injection/disposal/storage of CO2.  4. Frac design using Mini frac tests or Diagnostic Fracture Injection Test (DFIT).  Learning outcome:

  1. Understand the theory/fundamentals of well test interpretations, including flow geometry and boundary conditions.
  2. Understand the benefits injectivity/fall-off tests to maximize water injection and select candidate wells for wellbore stimulation
  3. Select perforating intervals for unconventional reservoirs using N2 injectivity/fall-off tests
  4. Why conduct step-rate tests and packer leak-off tests
  5. Learn the benefits of the Hall plot for water disposal/injection wells
  6. Learn the aapplications of Diagnostic Fracture injection Test (DFIT) or Mini Frac and their requirements by the AER
  7. Understand the analysis techniques of DFIT including:
    • Pre-Frac Closure
    • After Closure Analysis (ACA)
    • Numerous case studies from the Duvernay and Haynesville shale gas
  8. Learn how to extract geo-mechanical parameters from DFIT; such as, closure pressure, ISIP, and types of leak-off, which are essential to the frac design.
  9. Illustrate how injection tests are analyzed using commercial software

A detailed course hand-out, which is an excellent reference, will be provided.  Hand calculators are required for this class.

Fees: $800 + (5% GST)


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Download Course Description (PDF)

Who Should Attend?

This course is aimed at all the technical staff such as reservoir, petroleum and exploitation engineers/technologists, geophysicists, and geologists who are involved in well production/injection optimization and hydraulic frac design.

Course Instructor:

Mr. Saad Ibrahim, P. Eng, president of Petro Management Group Ltd. He has over 35 years of diversified experience in the oil and gas Industry as a worldwide highly recognized engineering consultant  and a distinguished instructor.  He also completed a post-graduate program with the University of Calgary in Chemical and Petroleum Engineering. The focus of Mr. Ibrahim’s experience lies in the area of Reservoir management, and well test planning/analysis.  Mr. Ibrahim is a member of APEGA and SPE.

Course Agenda:

  • Introduction to injection tests and stages of well testing
  • Technical background on well test analysis, including:
    • Flow geometry and boundary conditions
    • The use of the Horner and pressure derivation plots for pressure transient analysis (PTA)
    • The use primary pressure derivative to identified wellbore dynamic effects
  • Injectivity/off-test
    • How to analyze for injection/disposal wells and coal-bed-methane (CBM)
    • Case study
    • The application of N2 injection/fall-off tests for unconventional reservoirs.
  • Step-Rate Test
    • Benefits and analysis method
    • Packer leak-off test (case example)
    • Use of step-down test to estimate the pressure drop in the perforations and near wellbore due to tortousity
  • Hall Plot
    • Theory and applications
    • Interpretations of the Hall Plot
    • Class problem
  • Single Well Chemical Tracer Tests (SWCTT)
    • SWCTT is widely used to estimate the remaining oil saturation after:
      • waterflooding (Sorw), and
      • Enhanced oil recovery schemes
  • Diagnostic Fracture injection Test (DFIT) or mini Frac.
    • Applications/benefits
    • Analysis techniques, including:
      • Pre-closure analysis
      • After Closure Analysis (ACA)
    • Use of DFIT results for practical applications, including
      • Well flow-back design
      • Stress calibration and identification of natural fractures
      • Use of Net Fracture Pressure to monitor frac progress
    • Several case studies including tests from Duvernay, Haynesville
  • Closing comments and a question period