A high-resolution fault assessment workflow for unconventional reservoirs exploration: A case study on the onshore Sergipe-Alagoas Basin, Brazil

Rocha, Natacha M.; Coelho, Ana C.Q.M.; Menezes, Paulo T. L.

doi:10.1016/j.jsames.2021.103641

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Identifying the natural faults and fracture systems within hydrocarbon reservoirs can positively impact production and avoid geohazard problems during drilling operations (Coelho et al, 2021;Rocha et al, 2022;Perico et al, 2023). Geoscientists have dedicated substantial effort to designing seismic attributes to better map faults for several decades (Hussein et al, 2021;Ferreira and Porsani, 2023).…”

Section: High-resolution Fault Mappingmentioning

confidence: 99%

A High-Resolution subtle fault mapping in Marlin oilfield, Brazil

João,

Menezes,

Bergamaschi

2024

Braz J Geophys

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Discriminating geological discontinuities is important for reservoir management because they influence storage capacity and fluid flow. Structural heterogeneities, such as faults and fractures, significantly impact the compartmentalization of the reservoir’s facies and affect the flow of hydrocarbons. These structures can act as the pore space for fluid storage, flow-control conduits, or barriers that allow the accumulation of exploitable volumes of oil and gas. Understanding these structures’ spatial and temporal development can significantly impact hydrocarbon exploration. Reservoir characterization is a critical process in the oil and gas industry that aims to comprehensively understand reservoir rocks and their fluid content and distribution. It is a multidisciplinary approach that combines geological, geophysical, and engineering datasets through statistical and deterministic mathematical models. Seismic datasets play a crucial role in reservoir characterization. Interpreters can use seismic data processing and imaging to interpret geological horizons and map faults, building complex geological models. Seismic inversion is also employed to estimate acoustic impedance and other petrophysical properties. Faults and fractures mapping are highly relevant themes in reservoir characterization. Identifying subtle faults and fractures is essential in specifying hydrocarbon migration paths and identifying bypassed oil accumulations. However, traditional seismic amplitude data interpretation should consider these structures more. In this study, we apply a high-resolution fault mapping workflow to map the subtle faults system at the Marlim field in the offshore portion of the Campos Basin. As an outcome, we imaged two separate fault trends inside and outside the Marlim reservoir.

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Section: High-resolution Fault Mappingmentioning

confidence: 99%

A High-Resolution subtle fault mapping in Marlin oilfield, Brazil

João,

Menezes,

Bergamaschi

2024

Braz J Geophys

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“…Non-uniqueness is a central subject in geophysical interpretation. To reduce this issue, geophysicists often combine two or more geophysical methods with any available geologic data to constrain the interpretation attempting to encounter the most suitable geological model that fits the geophysical data [37,[40][41][42].…”

Section: D Forward Modelingmentioning

confidence: 99%

The Tectonic Framework of Parecis Basin. Insights from a Multiphysics Interpretation Workflow

Loureiro,

Menezes,

Zalan

et al. 2024

Preprint

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The Parecis Basin is one of the largest intracratonic basins in Brazil. Despite its considerable size, the basin has yet to be extensively explored, with only five wildcat wells drilled for hydrocarbons. So far, no commercial discoveries have been announced. Regional studies have suggested Paleozoic sedimentation, while recent studies indicate a Neoproterozoic fill. However, no tectonic model accurately describes the basin’s development, and no detailed structural map for the entire basin has been published. The present work presents a new detailed structural map of the Parecis Basin based on a four-step interpretation workflow integrating seismic and gravimetric data. The first step includes converting the public 2D seismic lines to the depth domain. The second step is estimating the residual Bouguer anomaly, where the computed residual anomalies should relate to the basin’s tectonic features. The third step comprises the 2D forward modeling of the gravimetric anomalies using the 2D seismic interpretation as a constraint. The final step compiled all the interpreted features into our new structural map. This map reveals the top of the basement, forming a complex framework of horsts and grabens. Normal faults define the main structural style in the basin. Further, we could recognize thick, high-density bodies embedded in the crystalline basement. These bodies consist of Orosian-Calimian (1.8-1.6 Ga) mafic and ultramafic rocks, which may be a potential source for hydrogen exploration in the basin. Subsequent geophysical and geochemical surveys will assess the hydrogen potential in the area.

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