Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
GAS HYDRATES IN OFFSHORE HYDROCARBON EXPLOITATION: REVIEW AND CASE ANALYSIS
Submission Author:
Hariel Udi Santana Mendes , Buscando endereço... , Brazil
Co-Authors:
Hariel Udi Santana Mendes, PAULO RIBEIRO, nilo kim, José Ricardo Pelaquim Mendes, Nara Angélica Policarpo
Presenter: Hariel Udi Santana Mendes
doi://10.26678/ABCM.ENCIT2022.CIT22-0270
Abstract
Gas hydrates are ice-like crystalline solids formed when gas molecules are trapped by water molecules in a low-temperature, high-pressure environment. In the explotatory industry of offshore oil and gas wells, there is hydrate formation evidence in drilling, logging, formation testing, completion, and well intervention activities, causing huge losses and delays for the companies operating these fields. In this work, a literature review was carried out on the industry cases where there was evidence of that issue in exploitation activities. The main causes for the hydrate formation in each of these cases and the consequences that occurred were commented on. To better discuss hydrate prevention techniques during well drilling, a phase behavior software was used, which provides hydrate equilibrium curves using thermodynamic inhibitors in drilling fluids. In addition, a description was carried out of the main techniques used for hydrate dissociation after it was formed: hydrate inhibitors circulation, depressurization through nitrogen circulation to relieve hydrostatic pressure, and assembly of a special column for hydrate jetting and removal.
Keywords
Gas Hydrates, Offshore exploitation, Hydrate prevention, Hydrate dissociation, Drilling fluids
