Techniques for improved reservoir characterization using advanced geological modeling in the oil and gas industry
Authors: Bolarinwa Solanke  , Femi Bamidele Onita  , Obinna Joshua Ochulor  , Henry Oziegbe Iriogbe  
Published: September 2024

Reservoir characterization is a crucial aspect of the oil and gas industry, providing insights into the properties and potential productivity of hydrocarbon reservoirs. Advanced geological modeling techniques have significantly enhanced the accuracy and efficiency of reservoir characterization. These techniques integrate diverse datasets and sophisticated algorithms to create detailed subsurface models that inform exploration, development, and production strategies. One of the primary techniques in advanced geological modeling is seismic interpretation, which involves the analysis of seismic data to map subsurface structures. High-resolution 3D seismic surveys provide detailed images of the subsurface, allowing geologists to identify faults, fractures, and stratigraphic features with greater precision. The integration of seismic inversion techniques converts seismic reflection data into quantitative rock property estimates, such as porosity and fluid saturation, further refining the reservoir model. Geostatistical modeling is another critical technique that improves reservoir characterization. By utilizing statistical methods to analyze spatial variability, geostatistics generates multiple realizations of reservoir properties, capturing the inherent uncertainty and heterogeneity of the subsurface. Techniques such as kriging, co-kriging, and sequential Gaussian simulation are commonly used to interpolate and extrapolate data from well logs and seismic surveys, creating probabilistic models that guide decision-making under uncertainty. Petrophysical analysis plays a significant role in enhancing geological models. Well logs, core samples, and laboratory measurements provide direct information about rock and fluid properties. Petrophysical models are developed to correlate these properties with depth and other geological features. Advances in machine learning and data analytics have further refined petrophysical interpretation by enabling the integration of large datasets and the identification of complex patterns that traditional methods might miss. Another advanced technique is the use of reservoir simulation, which models the flow of fluids within the reservoir over time. Reservoir simulators incorporate geological models, petrophysical data, and production history to predict future reservoir performance under different production scenarios. This dynamic modeling is essential for optimizing recovery strategies, enhancing field development plans, and managing reservoir performance. Multi-scale modeling approaches have also become increasingly important. These approaches integrate data and models across different spatial and temporal scales, from pore-scale petrophysical properties to basin-scale geological structures. By capturing the interactions between processes occurring at different scales, multi-scale models provide a more comprehensive understanding of reservoir behavior and improve the accuracy of predictions. The integration of machine learning and artificial intelligence (AI) has revolutionized reservoir characterization. Machine learning algorithms can process vast amounts of data from various sources, such as seismic surveys, well logs, production data, and geological maps, to identify patterns and relationships that enhance the understanding of reservoir properties. AI-driven techniques, including neural networks and support vector machines, are increasingly used for tasks such as facies classification, porosity prediction, and fracture detection, leading to more accurate and efficient reservoir models. The application of big data analytics in geological modeling has enabled the handling and analysis of massive datasets that were previously unmanageable. Advanced data analytics tools facilitate the integration, processing, and visualization of complex datasets, enhancing the ability to derive actionable insights and improve decision-making in reservoir management.
Keywords: Techniques, Reservoir Characterization, Advanced, Geological Modeling, Oil, Gas, Industries