Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Calcium carbonate precipitation risk index for downhole completions: A combined thermodynamic, kinetic and CFD modeling approach
Submission Author:
Vinicius Gustavo Poletto , PR
Co-Authors:
Vinicius Gustavo Poletto , Thiago Machado Neubauer, Marina Elizabeth Mazuroski, Fernando Cesar De Lai, Silvio L. M. Junqueira, Bruno Castro , Andre Leibsohn Martins
Presenter: Vinicius Gustavo Poletto
doi://10.26678/ABCM.COBEM2023.COB2023-1770
Abstract
The calcium carbonate formation represents a financial and technological challenge for the oil and gas industries, since it may lead to serious flow assurance issues. The mathematical prediction of the precipitation rates produced along the oil and gas downhole completion is a useful tool for risk management during the well project stage. A mathematical methodology involving the calcium carbonate thermodynamic, kinetics, and flow dynamics along the production flow line is developed. The proposed simulation workflow combines a polymorphic populational model to define the CaCO3 particles kinetics, a multiphase thermodynamic model to simulate the supersaturation conditions, and computational fluid dynamics to produce the pressure and velocity profiles of each equipment of the completion configuration. Combining simulation of the three models results in kinetic and thermodynamic precipitation rates. The developed mathematical workflow is applied to an open-hole 3-zone completion assembled with a 300m perforated tube with 1⁄2” holes. The completion operates with pressures, temperature, and salinities up to 450 Bar, 64oC, and 5 mol. L-1. The results indicate increasing precipitation rate, for both kinetic and thermodynamic ones, along the upstream direction. Notably, the kinetic rate produced a value in the range of mgCaCO3/day instead of the kgCaCO3 of the thermodynamic simulation. Besides that, it is possible to observe the influence of the pressure and residence times leading to an increase severity upstream the completion.
Keywords
Calcium carbonate, Inorganic Scaling, Flow assurance, Well Completion, population balance
