Banca de QUALIFICAÇÃO: SIMONE NABUCO CORREA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : SIMONE NABUCO CORREA
DATE: 15/02/2024
TIME: 13:30
LOCAL: videoconferência
TITLE:

Modeling and Sensitivity Analysis of Simulated Scenarios in Fractured-Karstified Carbonate Reservoirs using High-Resolution Outcrop Analog

KEY WORDS:

karst, reservoir, structural, stratigraphy

PAGES: 30
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUMMARY:

The petroleum industry has made remarkable progress in advancing tools and workflows to enhance the geological modeling process. However, the study of carbonate reservoirs presents unique challenges due to complex heterogeneities resulting from facies variations, faults, fractures, and karstic features. These heterogeneities have a direct impact on secondary porosity and high permeability layers, significantly influencing the accuracy of reservoir models and the formulation of development plans for these fields. This study introduces a comprehensive multidisciplinary workflow designed to bridge the knowledge gap and improve our understanding of fractured and karstified carbonate reservoirs. The initial phase of this workflow involves a combination of analog outcrop fieldwork and regional stratigraphic and structural correlation, which plays a crucial role in unraveling the geology and identifying the key factors influencing the processes of fracturing and karstification within the study area. Through detailed analysis of analog outcrops and correlation studies, our aim is to uncover the geological mechanisms that contributed to the development of fractures and karst features. The second phase involves the construction of 3D geological models. The regional stratigraphic and structural correlation indicated that the formed karst features were primarily controlled by stratigraphy, occurring predominantly below the regional unconformity, and by structural factors, developing in the NW-SE and NE-SW directions, aligning with mapped fractures and regional lineaments. Based on this analysis, three 3D geological models were generated: one fracture model using Discrete Fracture Network (DFN) and two matrix models. The distribution of fractures in the DFN model followed the primary fracture directions of NW-SE and NE-SW. Facies properties, porosity, and permeability were simulated in these geological models, incorporating two types of karst features: stratigraphic (diffuse karst) and structural (conduit karst). The permeability of the matrix in these models ranged from 0 to 100 mD, while the simulated karst exhibited average permeability values around 1000 mD. The combination of these models generated pessimistic, moderate, and optimistic scenarios that, when analyzed through reservoir flow simulations, provided valuable information for evaluating the impact on the development plans of reservoir projects.

COMMITTEE MEMBERS:
Presidente - 350640 - FRANCISCO HILARIO REGO BEZERRA
Interno - ***.785.944-** - VINCENZO LA BRUNA - NÃO INFORMADO
Externo à Instituição - FABIO LUIZ BAGNI - PETROBRAS
Externa à Instituição - RENATA EMILY BRITO DE ARAÚJO - UFRN