Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
COLD FLOW HYDRATE MANAGEMENT METHODS
Submission Author:
Erlend Oddvin Straume , PR
Co-Authors:
Erlend Oddvin Straume, Daniela Carolina Marques, Rigoberto Morales, Amadeu Sum
Presenter: Daniela Carolina Marques
doi://10.26678/ABCM.ENCIT2018.CIT18-0519
Abstract
Hydrate cold flow can be defined as flow of non-adhesive and non-cohesive hydrate particles dispersed in the production fluids at ambient temperatures. Cold flow related hydrate management strategies might significantly reduce the costs of oil and gas field development and production by removing or reducing the need for injection of chemicals, insulation and heating. One purposed method of producing hydrate dispersion is seeding of hydrate particles into the production fluids at hydrate equilibrium conditions to initiate controlled growth of hydrates as the dispersion is cooled to ambient temperatures. Use of anti-agglomerants combined with reducing viscosity by increasing water content have been proposed by other researchers. Alternatively, the water droplet size in water in oil dispersions can be reduced by utilizing static mixers or high velocity, which might facilitate readily conversion of the small water droplets into hydrate particles. Flow loop experiments indicate that cold flow works well for low to medium gas/oil ration and up to 20% water cut for both oil and condensate dominated systems. Experiments with crude oils containing wax show that cold flow could significantly reduce or eliminate wax deposition on pipeline walls. A field trial of the cold flow method in a once-through pipeline, which focuses on reducing droplet size, resulted in hydrate deposition.
Keywords
Gas Hydrate, Cold Flow, Hydrate Slurry Flow, Anti-Agglomerants, Hydrate depostion
