Integração de modelo geomecânico 1D e modelo com acoplamento fluxo-geomecânico para estudo da estocagem de CO2 em um reservatório de gás depletado da Bacia do Parnaíba

Abstract

The search for measures to reduce the effects of climate change has marked contemporary times. One of the most impactful gases is CO2, one of the main causes of the greenhouse effect. This gas comes from the combustion of automobiles, thermoelectric plants, and industries of various categories. It is directly related to the burning of fossil fuels. With this in mind, we seek ways to reduce the amount of CO2 in the atmosphere based on scientific studies. One of these methods is the sequestration and storage of this gas in an oil or gas reservoir. In this study, a 1D geomechanical model will be constructed based on well logs adapted from a gas field and mathematical correlations obtained from the literature on the subject, in addition to the creation of a flow model coupled with a 3D geomechanical model. With the 1D geomechanical model, it will be possible to describe the poroelastic behavior of the reservoir and the cap rock, that is, the behavior of the principal stresses acting on the formation and the pore pressure will be described, with the objective of calculating the maximum pressure that the reservoir can withstand so that the largest possible amount of CO2 can be stored. The flow model coupled with geomechanics will describe the behavior of the gas during storage, the cap rock that seals the gas in the reservoir, and the faults present in the reservoir. In this way, it will be possible to study issues involving the amount of injected CO2, the reservoir's behavior involving elastic properties over time, and the cap rock's response during storage.