8:00 – 8:40

8:40 – 9:20

PSIG 2503 – A GHG Emissions Data Management Approach that Enhances Sustainability for Pipeline Operating Systems

Bryan Marlborough (NEDD Technologies), Ivor Ellul (CiSK Ventures)

This paper examines the role of centralized software platforms designed for vendors to streamline the integration of sustainability data, addressing greenhouse gas (GHG) emissions from natural gas pipelines and related infrastructure. It details typical sources of pipeline GHG emissions, methodologies for data capture, and the lifecycle of data analysis through the lens of Scope 3 emissions.

Break

10:15 – 10:55

PSIG 2504 – Comprehensive Evaluation of Fugitive Emissions in Natural Gas Compressor Stations

Agustín Nicolás Baratcabal, Julian Zottola, Andres Crespo Pudor, Manuel Martinez Zara (Transportadora de Gas del Sur )

This article presents a comprehensive study on fugitive methane emissions in natural gas compressor stations, highlighting the quantification of losses using advanced infrared imaging technology. It analyzes the main emission sources, such as venting systems and compressor seals, and identifies the stations with the highest levels of critical leaks. Additionally, it discusses the mitigation strategies developed to reduce emissions and improve operational efficiency, emphasizing the importance of proactive management to comply with environmental standards.

10:55 – 11:35

PSIG 2505 – Real Life Gas Pipeline Optimization Using Digital Twin

Giancarlo Milano, Bob Truman (Atmos International)

This paper explores the use of a Large Language Model (LLM) with a real time gas pipeline system digital twin to generate future optimal operational plans. The presentation will cover this integration, as well as the validation of a recommended operational plan, and how it can be evaluated and implemented by gas controllers to enhance decision making capabilities, and improve operational efficiency.

Lunch

13:00 – 13:40

PSIG 2507 – Reciprocating Compressors Anew In Pipeline Simulation

Martin Stýblo, Marko Hauliš, Mirolslav Golha, Peter Pavelka, Robert Kristina (SIMONE Research Group, s.r.o., eustream, a.s.)

Paper focuses on two aspects of reciprocating compressors modeling: First, a simple yet reasonably accurate and technically sound model of reciprocating compressor is derived and discussed. Second, a computational model of mobile gas evacuation compressor units used to eliminate methane emissions during pipeline maintenance is presented, including comparison of simulation results and practical field application.

14:30 – 14:45

PSIG 2508 – Indonesia Natural Gas Corporate Market Compliance: Strategic Optimization Through PGN’s Contractual Innovations

Wahyu Wibowo, Merissa Pramitasari, Marchia Devi Aryatni Legansi, Andre Nicolas Immanuel (Department of Perusahaan Gas Negara)

This paper explores how these innovative contractual approaches have enabled PGN to increase its gas distribution volume and revenue streams. The SWAP contracts allow for the efficient reallocation of gas supplies between different regions and customers, minimizing logistical constraints, optimizing facilities and reducing transportation costs. By modifying direct contracts to multi-destination arrangements, PGN has expanded its ability to meet varying demand patterns and supply requirements, thus enhancing market responsiveness and customer satisfaction.

15:25 – 16:05

8:00 – 8:40

8:40- 9:20

9:20 – 10:00

Break

PSIG 2521 – Pipeline Slack Volume Estimation: Are We Still Packing the Pipe, or Releasing the Liquid?

Noorallah Rostamy, Prabhas Bhat, Vladimir Grinfelds, Robert Gates (Plains Pipeline LP)

Estimation of slack volume in a pipeline has always been challenging. In this paper, an in-house tool is presented to show a new methodology for determining the slack volume in a pipeline. The results from this tool are compared to the simulated results obtained from a real time transient modeling (RTTM) pipeline simulator software. The estimated slack volume is also validated by using real-time SCADA data from the instruments after the pipeline was started up and was fully packed.

10:55 – 11:35

PSIG 2522 – An Occam’s Razor for Estimation of Light-Heavy Batch Interface

Brett Christie (Plains Midstream Canada)

This paper discusses an effective procedure for performing non-linear regression; referred to as Occam’s Inversion. The procedure is applied to the problem of determining the extent of diffusion between heavy and light liquid products as they travel through the pipeline.

11:35 – 12:15

PSIG 2523 – Simulation and Challenges in the Purging and Load Operation Phase of the GASIG Gas Pipeline: Innovative Approaches and Thermohydraulic Optimization

Tiago Nery, Caetano Frisoli, Henrique Costa, Renata Reis, Eduardo Mercon (NTS – Nova Transportadora do Sudeste, Brazil)

This paper presents the planning and thermohydraulic analyses performed as part of the “Purge and Load” phase of the Itaboraí-Guapimirim Gas Pipeline (GASIG) in Brazil. It places particular emphasis on compliance with Brazilian regulations and the implementation of a new controlled flow natural gas injection method combined with gas heating. Through extensive simulations, the study addresses the real-time challenges encountered during pre-operation and provides valuable recommendations for future pipeline operations.

Lunch

13:30 – 14:00

Scholarship Award Presentation

14:15 – 14:45

Break

PSIG 2524 – Vapor Cavity Formation and Collapse During Switching of Product Tanks

Michelle Moyer, Michael Bednorz, Hamid Bidmus (DNV USA, Inc.)

This paper evaluates vapor formation and collapse in delivery terminal pipe upon closure of a manifold valve as part of switching the product stream. Unique high speed pressure recordings of several events are employed to calibrate transient simulation to several factors, including tank height differential, tank line length, valve speed closure, and others.   A major focus is accurately simulating the pressure spikes and the resultant forces caused by the collapse, and the exploration of modifications needed for mitigation of the movement, vibration, and MASP violations associated with the spikes.

15:40 – 16:20

PSIG 2525 – Simulating Vibrations in a Closed Pipe Riser System

John D. Yurchevich, Jenna Corti, Hamid Bidmus (DNV USA, Inc.)

This paper details analysis of a shut-in vertical riser to observe the impact of sea water motion and tidal waves on pressure reaction in the riser that could potentially cause vapor formation.  An excitation wave is used in a pipeline hydraulic simulator to model the external influences on the riser.  The design of the model, simulation results and any challenges, are described.

Reception

8:00 – 8:40

8:40 – 9:20

9:20 – 10:00

Break

PSIG 2529 – Reduced Order Models for Optimal Gas Flows

Criston Hyett, Robert Ferrando, Laurent Pagnier, Jean Alisse,
Igal Goldshtein, Lilah Saban, Michael Chertkov (University of Arizona, Noga, The Israel Independent System Operator)

This paper reviews the literature of reduced order models (ROMs) for natural gas flows over networks; classifying previous models into hierarchies and comparing their computational complexity. This more general perspective is then utilized to investigate opportunities for data-driven constructions of ROMs specialized toward system approximation for optimal gas flow problems.

10:55 – 11:35

PSIG 2530 – Piping Vibration in Offshore Compressor Station: Analysis and Field Measurements

A.Terenzi, M.Carpita, L.Maggiore (Saipem S.p.A.)

A study of an offshore compressor station hydraulic performance at different operating conditions, including a theoretical evaluation of potential piping vibrations, has been carried out following reported vibration issues by station operators. The study has been supplemented by field vibration measurements, as well as by the elaboration of possible mitigation actions relevant to critical flow conditions.

11:35 – 12:15

PSIG 2531 – Overcoming Commissioning Challenges in Real-time Gas Pipeline Simulation: A Case Study

Garry Hanmer, Renata Lins Reis, Tiago M. M. Nery, Henrique Costa (Atmos International, NTS)

This paper presents a case study of implementing a real-time transient pipeline simulation system on a large, operational gas transmission network. The authors address the challenges posed by the volume and quality of real-world data, including metering inaccuracies and inconsistencies. By employing data validation techniques, state estimation algorithms, and meticulous model tuning, they successfully achieved accurate and robust simulation results. The paper emphasizes the critical role of data integrity, model development, and efficient SCADA data management in real-time pipeline simulation, offering valuable insights and best practices for practitioners in the field.

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