Análisis geomecánico de riesgos en el almacenamiento subterráneo de CO2, caso : pozo Bullerengue Sur 1, Cuenca Sinú-San Jacinto, Colombia
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Garcia Ariza, Angie Lorena
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Castro Caicedo, Alvaro Jesus
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Trabajo de grado - Maestría
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EspañolFecha de publicación
2024-09-17
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Abstract
This study analyzes the probable geomechanical risks due to underground CO2 storage in a specific study area, using information provided by the Colombian Geological Service. A methodology based on international experiences, bibliographic references, consultations, and the author's experience in hydrocarbon reservoir geology was applied. Initially, information from a wide area of the basin was used, followed by a screening process that selected the geological sector characterized by the Bullerengue Sur 1 exploratory well for hydrocarbons. This selection was due to differentiating characteristics compared to other sectors, in aspects such as: information reliability, prospective
formations for storage and sealing, depth conditions, and geomechanics. In the selected sector, a 1D geological and geomechanical model was developed to evaluate the properties of the formations and geological structures. Layers of claystones and mudstones from the Upper Porquero, Lower Porquero, and Ciénaga de Oro Formations were identified as favorable seals for CO2 storage. To assess the risks due to the presence of natural fractures, deterministic and probabilistic geomechanical models
were implemented according to the Fault Slip Potential model. The results indicated that the fractures modeled in the claystone layer of the Upper Porquero Formation have a lower reactivation potential compared to fractures in other seal layers. Finally, static modeling of CO2 injection was performed to simulate the behavior of this seal layer under pressure, resulting in Von Mises stresses on the rock, concluding with the necessary strength requirements for stability.
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