Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
THE LOST CIRCULATION EFFECT IN A SINGLE FRACTURE ON A WELLBORE TEMPERATURE PROFILE
Submission Author:
James Romano , PR , Brazil
Co-Authors:
James Romano, Fernando Cesar De Lai, Silvio L. M. Junqueira
Presenter: James Romano
doi://10.26678/ABCM.COBEM2019.COB2019-1384
Abstract
During drilling operations, the wellbore temperature profile is used when selecting well casing materials, making cementation related decisions, and, most importantly, identifying loss zones. In this work, a transient heat transfer mathematical model for a fractured wellbore is proposed. The well has its geometry simplified to a concentric annular cylinder which has one or more discrete fracture in its external wall (well-formation interface). The thermal model is obtained with the first law, focusing the heat interactions between the pipe, the annular region and the formation. The key characteristic of the present model is the fracture detection obtained graphically, through the thermal gradient profile, which is an output of the solution of the discretized energy equation in the domains. It is verified that increasing lost circulation intensity decreases the temperature of the whole annular region. In addition, increasing the loss rate favors fracture detection, since the discontinuity in the annular region thermal gradient profile is intensified.
Keywords
lost circulation, Temperature Profile, drilling fluid
