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Development of Pseudo Dry Gas

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Course Credit: 0.15 CEU, 1.5 PDH

The development of the Pseudo Dry Gas (PDG) Concept has now been approved and funded for high pressure full system testing (TRL5 – API / TRL8 – NASA) within the first phase. The project has been provided significant grant funding from British, Norwegian and Australian Governments due to the step change of operational CO2 emissions from upstream gas gathering systems in relation to ‘energy add’ concepts, upwards of 70%-90%. Furthermore, this broad governmental support is further reinforced by a consortium of three Operators working within the Net Zero Technology Centre framework towards first deployment.

Pseudo Dry Gas (PDG) technology is based on the concept of changing the resistance curve in gas tiebacks. From the quadratic behavior seen with standard multiphase flow subsea tiebacks to a linear behavior starting at lower back pressure with PDG. The changing of the resistance curve enables significantly more efficient use of existing downhole energy. This efficient flow is created by the means of removing the liquid at multiple points within a pipeline and inducing dry gas hydraulic behavior.

The presentation focuses on the first stage of the roadmap covering the first 18 months to high pressure hydrocarbon testing. As well as on a review of the scientific basis of the testing envelopes, linked to field studies, CFD work through the evaluation of the design and the low-pressure prototype testing and how these and other factors relate to the higher concept design. The goal of this presentation is to demonstrate the scientist basis to increase industry understanding of this decarbonization technology and demonstrate roadmap of the preproduction qualification work. All content contained within this webinar is copyrighted by Terry Wood and its use and/or reproduction outside the portal requires express permission from Terry Wood.


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Course Chapters

  • 1Development of Pseudo Dry Gas - Chapter 1
    Media Type: Video


Earn credits by completing this course0.15 CEU credit1.5 PDH credits


Luis Zerpa AcostaLuis Zerpa is an Associate Professor and Associate Department Head of the Petroleum Engineering Department at the Colorado School of Mines. Luis holds the Harry D. Campbell Endowed Chair, is the Director of the Center for Rock and Fluid Multiphysics, and is an affiliated faculty of the Center for Hydrate Research. He has B.S. and M.S. degrees in Mechanical Engineering, and a Ph.D. degree in Petroleum Engineering.

Luis has been working on reservoir engineering research for over 20 years and in hydrate research for over 15 years covering experimental and modeling work of hydrates in nature and in flow assurance. His research combines experimental and modeling evaluation of multiphysical properties of rocks, fluids, and their interactions with applications to flow assurance, petroleum reservoir engineering, geothermal, and CCUS.
Terry Wood