Abstract:
Natural gas hydrates (NGHs) cannot reach thermodynamic
equilibrium in real reservoir conditions. The enormous amount
of methane stored in NGHs could be a potential source of energy.
Lack of reliable field data makes it difficult to predict the
production potential, as well as the safety of CH4 production
from NGHs. Computer simulations cannot substitute field data.
Nevertheless, state of the art modelling can be used to evaluate
possible long-term scenarios. However, we need proper kinetic
models to describe hydrate dissociation and reformation and all
phase transition routes must be considered. In this work, we utilized
an in-house extension of RetrasoCodeBright (RCB) to perform
a gas hydrate case study of the Bjørnøya basin, based on
very limited geological data extracted from reported field studies.
The aim of this research was to use a reactive transport simulator
and non-equilibrium thermodynamics to analyse CH4 production
from the gas hydrate. Results show fast propagation of
pressure drop wave throughout the reservoir layer by imposing
drawdown pressure on the well, as a result, gas hydrate dissociation
and CH4 production started at the early stages of the five
year simulation period.
Description:
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.
