SPE Online Education
Development of Pseudo Dry Gas
Recorded On: 10/27/2022
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.
This webinar is categorized under the Projects, Facilities, and Construction and Health, Safety, Environment, and Sustainability technical disciplines.
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.
Terry Wood, Subsea Engineering Manager and Global Flow Assurance SME for Worley, has over twenty years’ experience in the Energy industry from conventional oil and gas developments to CCUS and Hydrogen projects. He provides technical assurance to all projects with a flow assurance and subsea processing element, whilst providing strategic leadership for the global flow assurance group. Terry is a technical advisor on subsea processing technologies being developed internally and externally, has worked on a number of subsea processing studies and has presented at numerous conferences / seminars on subsea processing. He is active member of the Pseudo Dry Gas Separator system being developed by Worley, a subsea separator and pumping system.
Terry has managed a number of deepwater subsea projects during the Concept and FEED phases. He continues to evolve his understanding of flow assurance an thermodynamics in the area of energy transition and in particular his recent involvement with CCUS and Hydrogen projects.
Luis Zerpa Acosta (Moderator)
Luis Zerpa is an Associate Professor at the Petroleum Engineering Department of the Colorado School of Mines. Luis received his degrees in Mechanical Engineering (BS and MS) from the University of Zulia (Venezuela) and PhD in Petroleum Engineering from the Colorado School of Mines. He is a faculty member of the Center for Hydrate Research at MINES, and has been working on hydrate research for over 10 years covering experimental and modeling work of hydrates in flow assurance.
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