Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Experimental investigation of hydrate formation in crude oil and high salinity brines
Submission Author:
Luiz Fernando Santos De Vasconcelos , PR
Co-Authors:
Luiz Fernando Santos De Vasconcelos, Celina Kakitani, Moisés Marcelino Neto, Rigoberto Morales, Amadeu Sum
Presenter: Moisés Marcelino Neto
doi://10.26678/ABCM.COBEM2023.COB2023-0540
Abstract
In oil and gas production, forming hydrate plugs can lead to pipeline blockages, causing economic losses and safety issues. Extended shutdowns during oil and gas production can increase the potential risk of hydrate blockage when production is restarted. This work aims to characterize experimentally the process of hydrate formation in systems with high salt concentrations, with or without the addition of inhibitors and/or antiagglomerants. Also, to investigate the effect of high salinity brine on the flowability of hydrate formed by evaluating formation and transport under multiphase conditions, agglomeration, and bedding deposition in a rock-flow cell. Pressure, temperature, image data, and the estimated amount of hydrate formed were obtained. All experiments were conducted under constant pressure (60 bar and 80bar),in a three phase system, water and additives as aqueous phase, synthetic natural gas as gas phase and crude oil as oil phase). The hydrate formation were evaluated under different conditions: water cuts (10-50%) , liquid loading (30-50%), subcooling (5-15°C) and salt concentration (up to 16 wt% ). In uninhibited systems, it was observed that the bedding profile is favored for higher water cuts, and for lower water cuts, the dispersed/wall deposition profile was obtained. The dispersed morphological profile was favored in scenarios where the salt concentration increased.
Keywords
Gas Hydrates, Salt Water, Crude Oil, rock -flow cells
