Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
AN ALGORITHMIC APPROACH FOR COUPLING CREEP INDUCED STRAIN AND ANNULAR PRESSURE BUILDUP IN OIL WELLS
Submission Author:
Eduardo Bader Dalfovo Mohr Alves , SC
Co-Authors:
Eduardo Bader Dalfovo Mohr Alves, Arthur Pandolfo da Veiga, Eduardo Fancello, Jader Riso Barbosa Jr.
Presenter: Eduardo Bader Dalfovo Mohr Alves
doi://10.26678/ABCM.ENCIT2020.CIT20-0713
Abstract
This paper presents a new algorithmic formulation to couple a state-of-the-art thermal solver, used for computing Annular Pressure Buildup in deep sea oil producing wells, with a novel procedure for calculating creep behavior in salt layers. The latter makes use of a basic non linear solid model based on a constitutive relationship developed for salt rocks. The thermal model solves momentum and energy balance equations (coupled with radial thermal resistances for the concentric wellbore regions) to determine the pressure and temperature on the production fluid. The results, which are discussed in the light of qualitative and quantitative comparisons using a real well geometry, look promising, therefore indicating the validity of the new approach. Moreover, a direct relation between APB and the creep amplitude was identified for the case tested. The model seems to confirm that the effects of creep are not significant for the initial lifespan of wells.
Keywords
APB, Creep, Salt Simulation, FEM
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