Review of Well Injection tests 2017-05-02T19:28:36+00:00

Review of Well Injection tests

Saad Ibrahim, P. Engineer, President Petro Management Group

Interactive Workshops: May 10, 2017, Calgary AB

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Agenda/outline:

Well injection tests have been used in the oil industry for various applications. In the early 1960’s injectivity fall-off tests and the Hall Plots were used to evaluate the injectivity efficiency of water disposal and injectors. With the shift to unconventional activities, step rate tests and Diagnostic Fracture Injection test (DFIT) have been widely used to obtain vital information to design frac treatments.

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 a1applications of Diagnostic Fracture injection Test (DFIT) or Mini Frac and their requirements by the AER
  7. Understand the analysis techniques of DFIT including:
    1. Pre-Frac Closure
    2. After Closure Analysis (ACA)
    3. 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 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. No calculators are required for this class!

Who Should Attend:

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

Course Instructor:

Mr. Saad Ibrahim, P. Eng,

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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)

Hall Plot

  • Theory and applications
  • Case example

Diagnostic Fracture injection Test (DFIT) or mini Frac

  • Applications/benefits
  • Analysis techniques, including:
    1. Pre-closure analysis
    2. After Closure Analysis (ACA)
  • Use of DFIT results for practical applications, including
    1. Well flow-back design
    2. Stress calibration and identification of natural fractures
    3. Use of Net Fracture Pressure to monitor frac progress
  • Several case studies including tests from Duvernay, Haynesville

Closing comments and a question period

Cost: $900
Date: May 10, 2017




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