T2Well/ECO2N Version 1.0: Multiphase and Non-Isothermal Model for Coupled Wellbore-Reservoir Flow of Carbon Dioxide and Variable Salinity Water

Abstract

At its most basic level, the injection of CO 2 into geologic CO 2 storage sites involves a system comprising the wellbore and the target reservoir. The wellbore is the only conduit available to emplace CO 2 into reservoirs for long-term storage. At the same time, wellbores in general have been identified as the most likely conduit for CO 2 and brine leakage from geologic carbon sequestration (GCS) sites, especially those in sedimentary basins with historical hydrocarbon production. We have developed a coupled wellbore and reservoir model for

Dynamic Behavior of CO2 in a Wellbore and Storage Formation: Wellbore-Coupled and Salt-Precipitation Processes during Geologic CO2 Sequestration

“…In this study, two simulators were compared; one for the EPM model applying to Case 1 was TOUGH2/ECO2N [53,54] and the other for the WR model in Case 2 was T2Well/ECO2N [24,55]. TOUGH2 is the numerical simulator capable of simulating nonisothermal multiphase and multicomponent fluids in multidimensional porous and fractured media [53].…”

“…Additionally, fluid velocities within the wellbore are determined by the mixture velocity ( ) and the drift velocity ( ), which is calculated from the Drift-Flux-Model (DFM) [57]. Specifically, is calculated by solving following momentum equation [55]:…”

“…Other terms in (2) can be found in the nomenclature. Further details about the T2Well/ECO2N simulator can be found in Pan et al [55].…”

Numerical Modeling of CO2 and Brine Leakage through Open Fracture in a Fault Zone: Open Channel Flow or Darcy Flow

“…The details of the approach used in T2Well for modeling flow in wellbore can be found in the manual or other related papers [17][18][19] and would not be duplicated here. However, we have slightly modified the code to adapt the simulator to the case of fracture flow because the open space of a fracture is not of a circular shape as in the case of a wellbore.…”

“…The momentum equation (1) uses the general terms, the perimeter D, and the cross-section area , which should have no problem to apply to any geometric shape of open space including the rectangle shape of a fracture. The major difference is in the friction coefficient, , which is calculated as a function of local Reynold number, the wall roughness, and the effective diameter of the pipe in T2Well [18,19] for Re > 2400,…”