Process Safety of Hydrate Blockage Depressurization

Recorded On: 09/24/2020

Hydrate plugged a pipeline with gas flowing through water at elevated pressure, low ambient temperature, treated with a hydrate promoter and spiked with propane. Predictive methods accurately showed where the dominant blockage formed. During blowdown from 660 to 12 psia, hydrate redeposited in vent orifice. Field measured flow velocity reached 74 ft/s, wall shear at hydrate deposition reached 78 Pa. Hydrate deposited at that shear reduced the orifice area approximately by half, which extended the time to depressurize, affecting process safety. Blowdown time formula matched state-of-the-art multiphase transient simulation. Shear stress should be a common parameter reported by researchers in flow assurance.

This webinar is categorized under the Projects, Facilities, and Construction technical discipline.

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For more information on this topic, please check out the SPE suggested reading links below. Here you will find topic-related books, publications, and papers for purchase in the SPE Online Book Store as well as on OnePetro.

SPE Bookstore:

Hydrate Engineering (Digital Edition)

OnePetro Papers:

Formation of Hydrates in Shut-down Pipelines in Offshore Conditions.

GOM Export Gas Pipeline, Hydrate Plug Detection and Removal

Natural Gas Hydrates And Global Change

Gas Hydrate Formation and Dissociation with Thermodynamic and Kinetic Inhibitors

Hydrate Problems in Gas Lift Production: Experiences and Integrated Inhibition

Dr. Taras Makogon

Flow Assurance Specialist

Dr. Makogon's primary focus is to help oil and gas companies solve complex fluid problems in operations, and to design new systems to prevent future problems based on experience. He has been gainfully employed in the energy industry helping people move faster and live longer.  He has a mining physics Engineer degree from the Gubkin University, MBA in Finance from HBU and a Doctorate in ChemE from CSM, holds several patents and serves on the SPE Flow Assurance Technical Section. His hobbies are overclocking and molecular modeling.

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09/24/2020 at 1:00 PM (EDT)   |  90 minutes
09/24/2020 at 1:00 PM (EDT)   |  90 minutes
20 Questions
0.15 CEU/1.5 PDH credits  |  Certificate available
0.15 CEU/1.5 PDH credits  |  Certificate available