Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Study of Hydrate Formation in Transient Conditions
Submission Author:
Celina Kakitani , PR
Co-Authors:
Daniela Carolina Marques, Moisés Marcelino Neto, Rigoberto Morales, Amadeu Sum, Celina Kakitani
Presenter: Daniela Carolina Marques
doi://10.26678/ABCM.COBEM2017.COB17-1597
Abstract
In an oil and gas production, it is common transient operation involving shut-in and restart and at these conditions there is a high probability of hydrate formation. When the flow in the pipe stops, the fluids start cooling down due to the heat transfer with the subsea environment. If the shut-in takes enough time for the fluids reach the hydrate formation temperature, the restart could result in rapid hydrate formation and even form hydrate plug. In this study, we simulate transient operations by performing a series of experiments in a high pressure rheometer to determine the conditions that can result in favorable and unfavorable restart conditions. The system tested are mineral oil, water and gas. The rheometer allows for precise control of the impeller rotation and measures parameters such as the torque, which can be correlated with an apparent viscosity. Tests were performed to understand and identify which conditions hydrate plugs form or flowable conditions results with the restart. The results from these tests can contribute to our understanding of hydrate formation and agglomeration, as well as correlate the condition that hydrate plug can form in a shut-in and restart process.
Keywords
Gas Hydrate, Transient Condition, Rheometer
