Oil and Gas

Oil and Gas | Facilities and Surface Operations

Acid Gas Compression and Injection

Course Code: N634
Instructors:  Ed Wichert
Course Outline:  Download
Format and Duration
1 days


This one-day course provides a comprehensive overview of the design and operational aspects of acid gas compression and injection projects.  The presentation includes a detailed discussion of the phase behavior of acid gas and outlines the methods for estimating the properties of acid gas for the design of the compression and injection facilities.  It also addresses the methods for controlling corrosion and prevention of the formation of hydrates.  Design considerations of compression and cooling equipment, injection line, well completion, and reservoir selection are also discussed.  Technical and operations persons involved in the design or operation of acid gas injection projects would greatly benefit from this course.  A comprehensive set of course notes is included.


The course helped me fill in the blanks on some sour gas processes and sulfur recovery processes. I now have a better understnading on compression stages and liquid removal rates between the stages of compression. Hydrates and dew points were explained well.

Duration and Training Method

One classroom day providing .8 CEU (Continuing Education Credits) or 8 PDH (Professional Development Hours)

Course Overview

Participants will learn to: 
  1.  Discuss acid gas extraction from sour gas.
  2.  Present options for disposal of acid gas.
  3.  Determine properties of acid gas.
  4.  Predict conditions for the formation of hydrates and methods of prevention.
  5. Select method for dehydration of acid gas.
  6. Predict the dewpoint pressure of acid gas.
  7. Prevent corrosion in acid gas process equipment
  8. Estimate required pressure for acid gas injection.
  9. Determine number of compression stages.
  10. Understand relationship among hydrate temperature, acid gas dewpoint temperature and water dewpoint temperature at the injection pressure.
  11. Design considerations for after-cooler.
  12.  Design considerations for acid gas injection line and wellsite facilities.

Course Agenda

  1. Brief review of sour gas sweetening
  2. Brief review of sulfur recovery options
  3. Properties of acid gas, vapor/liquid behavior
  4. Control of corrosion and avoiding hydrate formation
  5. Determining number of compression stages
  6. Materials selection
  7.  Cooler design considerations
  8. Injection line design considerations
  9. Operation of injection facilities, e.g., blowdown
  10. Metering
  11. Selection of injection zone

This course is intended for engineers and technologists involved in the specification and design of acid gas compression facilities, and for foremen and operators responsible for the daily operation of such facilities.

Ed Wichert

Edward Wichert has an extensive background in the oil and gas industry.  This includes experience at the technical level as well as in management in drilling, oil and gas production and processing, reservoir engineering and economic analysis.  He gained this experience through employment in the oil and gas industry in Alberta, with small, intermediate and large companies.  He holds a B. Sc. degree in Petroleum Engineering and a Master's degree in Chemical Engineering.  His research interests are mainly related to sour gas.  He has published several articles dealing with determining the properties of sour gas and the application of technology in sour gas production and processing, as well as the disposal of acid gas by compression and injection. 

He is an independent oil and gas industry consultant in Calgary, and was Adjunct Professor in the Department of Chemical and Petroleum Engineering at the University of Calgary from 1996 to 2005.  He has presented courses in natural gas technology worldwide, and is the recipient of the Award of Merit from the Canadian Gas Processors Association, in 1994, the Lifetime Achievement in Hydrocarbon Measurement award from the Canadian Institute of Hydrocarbon Measurement, in 2003, and the Project, Facilities and Construction Award from the Society of Petroleum Engineers.  He has recently written a comprehensive book on the technology of sour gas production, gathering, treating, and the different methods of acid gas disposal. 

Affiliations and Accreditation
Member of Retirees, Canadian Gas Processors Association, 2018
Member of APEGA since July, 1961
Lifetime Member of SPE

BSc Degree in Petroleum Engineering, 1958
MEng Degree in Chemical Engineering, 1970
Adjunct Professor in Chemical and Petroleum Engineering, University of Calgary, 1996 to 2005
Recipient of the following industry awards:
 - Award of Merit, Canadian Gas Processors Association, 1994
 - Lifetime Achievement in Hydrocarbon Measurement, Canadian Institute of Hydrocarbon
      Measurement, 2003
 - Project, Facilities and Construction Award, Society of Petroleum Engineers, 2008
Authored or Co-authored over 20 technical articles (CV at www.grayjay.ventures)
Wrote “The Sour Gas, Sulfur and Acid Gas Book”, 2018 (The Book at www.grayjay.ventures)

Courses Taught
N632 - Acid Gas Compression and Injection   
N635 - Metering of Natural Gas and Associated Liquids  
N632 - Sour Gas Treating     


CEU: 0.8 Continuing Education Units
PDH: 8 Professional Development Hours
Certificate: Certificate Issued Upon Completion
RPS is accredited by the International Association for Continuing Education and Training (IACET) and is authorized to issue the IACET CEU. We comply with the ANSI/IACET Standard, which is recognised internationally as a standard of excellence in instructional practices.
We issue a Certificate of Attendance which verifies the number of training hours attended. Our courses are generally accepted by most professional licensing boards/associations towards continuing education credits. Please check with your licensing board to determine if the courses and certificate of attendance meet their specific criteria.