Programa de Pós-Graduação em Geodinâmica e Geofísica
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Master Thesis Integração de métodos petrofísicos para caracterização multiescala de sistemas porosos em rochas carbonáticas da Bacia Potiguar(Universidade Federal do Rio Grande do Norte, 2025-09-19) Carvalho Filho, Irosvaldo Ferreira de; Xavier Júnior, Milton Morais; http://lattes.cnpq.br/3128669965557866; http://lattes.cnpq.br/0214549347192524; Souza, André Alves de; Xavier Neto, Pedro; http://lattes.cnpq.br/0420885770350995This dissertation presents a comparative analysis of petrophysical techniques applied to the characterization of porous systems in carbonate rocks, focusing on a set of 101 samples from the Potiguar Basin, of which 9 were exclusively allocated for digital analyses. The study integrated traditional methodologies, such as gas porosimetry and water saturation porosity, with advanced digital imaging techniques, including X-ray microtomography (Micro-CT), synchrotron radiation tomography (SR-CT), and Nuclear Magnetic Resonance (NMR) measurements. The research highlighted the complementary nature of these methods, demonstrating how each technique accesses specific fractions of the porous system: gas porosimetry proved highly efficient in determining interconnected volumes; water saturation revealed the fraction effectively occupied by mobile fluids; NMR stood out for its sensitivity to micropores; while microtomography enabled detailed characterization of structural connectivity and three-dimensional morphometry of the porous medium. The results indicate that variations between techniques are explained by factors such as the presence of unsaturated pores, trapped air, wettability limitations, and differences in image resolution. From a statistical standpoint, the integration of scatter plot analyses with ANOVA and Tukey HSD tests confirmed significant differences between lithofacies and among the applied methods, reinforcing the importance of multitechnique approaches in the petrophysical characterization of carbonate reservoirs.Master Thesis Utilização de técnicas de decomposição espectral, condicionamento e atributos sísmicos para realçar falhas em um dado sísmico 3D localizados na região de Estreito/Alto do Rodrigues(Universidade Federal do Rio Grande do Norte, 2025-04-28) Silva Júnior, José Romero dos Santos; Antunes, Alex Francisco; https://orcid.org/0000-0002-3292-4190; http://lattes.cnpq.br/1519973126832391; http://lattes.cnpq.br/4404081246897982; Silva, Carlos César Nascimento da; http://lattes.cnpq.br/5136096872133075; Oliveira, Karen Maria Leopoldino; https://orcid.org/0000-0001-9061-7183; http://lattes.cnpq.br/8255754911585494The application of spectral decomposition and structurally oriented filtering techniques proved effective in enhancing the structural interpretation of seismic data. This study aimed to optimize the seismic bandwidth and improve the signal-to-noise ratio in a 3D seismic volume from the Estreito/Alto do Rodrigues field, located in the central-southern portion of the Potiguar Rift. The adopted methodology involved segmenting the seismic data into overlapping frequency sub-bands (15–85 Hz), applying the Dip Steering Median Filter (DSMF), and using seismic attributes such as similarity, pseudo-relief, Fault Likelihood (FL), and Thinned Fault Likelihood (TFL) to improve fault identification. As expected due to seismic attenuation, lower-frequency bands allow for the visualization of deeper structures in the sections, while higher-frequency bands exhibit more segmented reflectors, which can hinder seismic interpretation. The combined use of spectral filtering and attribute analysis enabled a more detailed interpretation of fault-related structures, including a flower structure, a possible inversion structure, and major faults trending northeast-southwest.Master Thesis Estratigrafia de sequências dos depósitos marinhos profundos do Albiano ao Eoceno no setor offshore oeste da Bacia Potiguar, Margem Equatorial Brasileira(Universidade Federal do Rio Grande do Norte, 2022-11-29) Monteiro, Juliana Cavalcante; Córdoba, Valéria Centurion; Sousa, Débora do Carmo; http://lattes.cnpq.br/3244080713189448; https://orcid.org/0000-0002-1836-4967; http://lattes.cnpq.br/8212523609187259; http://lattes.cnpq.br/4231561186439955; Cruz, Liliane Rabelo; Xavier Neto, Pedro; http://lattes.cnpq.br/0420885770350995The Potiguar Basin was created as a result of the distensional events responsible for the fragmentation of Pangea and the consequent creation of the African and South American continents. It is part of the set of basins originated due to the deployment of the Brazilian Equatorial Margin. In the Potiguar basin, detailed studies focused on deep water sequence stratigraphy still remain infrequent. Thus, this research aims to better understand the tectonostratigraphic evolution of the studied area, more precisely within the interval between the early Albian and middle Eocene unconformities (sensu Pessoa Neto et al., 2007), which includes the sequences of the transgressive drift phase and its change to the regressive drift phase of the basin. With well data, seismic lines and a 3D seismic volume, the section of this study was investigated in order to identify the depositional sequences, their internal units, chronostratigraphic boundries, seismic facies, lithofacies and associated depositional systems. The results of this investigation are eight stratigraphic sequences, named S1, S2, S3, S4, S5, S6, S7 and S8, considering the higher resolution analysis from the well data; these sequences, in the seismic data, were grouped in three seismic stratigraphic units, US1, US2 and US3, with the oldest two of them being transgressive. This study, based on models applied to the deep marine depositional environment, aimed to understand the nature of sedimentation on the shelf edge and its influence on more distal sectors of the basin, since such processes considerably control the gravitational fluxes responsible for the transport, dispersion and deposition of sediments in deep waters. Besides this, it is important to note that the Potiguar Basin has an exploratory history for hydrocarbons, focused on its onshore portion. However, the recent oil discoveries in its correlated basin in West Africa, the Benin Basin, signals a real possibility of discoveries of new exploratory plays in the offshore portions of this basin, mainly associated with turbidite deposits.Doctoral Thesis Geomorfologia e arquitetura interna do vale inciso do Rio Açu na bacia potiguar imersa (NE Brasil)(Universidade Federal do Rio Grande do Norte, 2012) Gomes, Moab Praxedes; Vital, Helenice; Macedo, José Wilson de Paiva; http://lattes.cnpq.br/8074712340427454; Costa Neto, Leão Xavier; http://lattes.cnpq.br/1059276496317561; http://lattes.cnpq.br/3595069999049968; http://lattes.cnpq.br/2086362176219605; Xavier Neto, Pedro; http://lattes.cnpq.br/0420885770350995; Caldas, Luciano Henrique de Oliveirac; http://lattes.cnpq.br/1850164003052269The tectonic-sedimentary framework of a marginal basin contains traces of the marine and continental history of certain portion of planet Earth. The evolution of passive margins, specifically on continental shelves, has been intensively studied over the last century, because of the economic and scientific interests. Moreover, the recent methodological and technical advances in field data collection and analysis have transformed shallow marine studies from descriptive to quantitative and based on integration of different datasets. This Thesis presents the integration of multidisciplinary data (Landsat images, gravimetry, altimetry, singlebeam bathymetry, sonography, shallow seismic, sedimentology, current measurements and observations by SCUBA diving) which allowed the analysis of geomorphological expression of the northern Continental Shelf of the Rio Grande Norte state (NE-Brazil) and its correlation with their last phases of sedimentation in the context of the submerged Potiguar Basin, including sea-level fluctuations in the Quaternary, pre-Holocene subaerial exposure, the establishment of the Holocene currents on continental shelf, and pre-Cenozoic tectonic fault reactivation. This shelf is shallow, narrow and can be divided into inner, middle and outer shelf, and displays several geomorphological features. Its geometry and morphology is controlled by neotectonics. On it, there is an incised valley of the Rio Acu, a key element in the last stratigraphic record of Holocene transgression. The morphology of the Açu incised valley aligns with the central axis of Potiguar Basin and is strongly influenced by neotectonics in the context of the Domain Equatorial Atlantic Margin. The incised valley-fill was controlled by the morphology during transgression, as well as the morphology constraints the hydrodynamic processes and dispersal of siliciclastic and carbonate sediments during periods of highstand. Patch reefs, with coraline algae colonies were found between 20 and 40 m water depth. It allowed inferences about the mixed sedimentation in the Pleistocene and Holocene. These results contribute to the study of paleo-environmental conditions of the Quaternary, analogues reservoirs, shallow marine depositional models of high-energy tropical shelf, hydrocarbon exploration, geotechnical, environmental matters, navigation and others.Doctoral Thesis Análise estratigráfica integrada do Albiano ao Campaniano da Bacia Potiguar: da escala sísmica à de reservatórios(Universidade Federal do Rio Grande do Norte, 2021-07-29) Melo, Anderson Henrique de; Lima Filho, Francisco Pinheiro; Magalhães, Antônio Jorge Campos; 0000-0001-9417-6602; http://lattes.cnpq.br/7278609149703896; http://lattes.cnpq.br/9888320802954176; http://lattes.cnpq.br/9256001573771083; Scherer, Claiton Marlon dos Santos; http://lattes.cnpq.br/3488329717814652; Riccomini, Claudio; http://lattes.cnpq.br/8670893946594677; Gabaglia, Guilherme Pederneiras Raja; Becker, Mauro Roberto; http://lattes.cnpq.br/5944589406034425The Albian to Campanian interval of the Potiguar Basin is very important academicaly and economicaly. However, there is no complete and updated seismic scale stratigraphic framework for this interval that describes its sequences and system tracts. Additionally, on a reservoir scale, the development of producer oilfields in the Açu Formation is based on lithostratigraphic zonations that do not always represent heterogeneities critical to the fluid flow in the reservoirs, which increases the geological uncertainties associated to the characterization of producer zones and producer well’s behavior. Aiming to solve such demands, the present thesis aims to provide an integrated stratigraphic framework for the studied interval, which describes sequences, stacking patterns and stratigraphic surfaces in the different scales of observation. At the seismic scale, an integrated analysis of seismic, well and biostratigraphic data led to the definition of five 3 rd order depositional sequences and their respective system tracts and stratigraphic surfaces. The Depositional Sequence 1 comprises Albian siliciclastic and carbonate deposits. The Falling Stage System Tract of Depositional Sequence 1 (FSST 1) is preserved in submarine canyon C1. The Lowstand System Tract of Depositional Sequence 1 (LST 1) is composed of fluvial deposits restricted to valleys or non-confined and amalgamated and deltaic deposits basinward. Marine carbonate rocks (Ponta do Mel Formation) and their onshore fluvial counterparts represent the Transgressive (TST 1) and Highstand (HST 1) system tracts. Depositional Sequence 2 are mid- to early Cenomanian aged. The submarine canyon C2 is filled with FSST 2 and LST 2. Onshore, LST 2 is composed of braided fluvial systems. TST 2 onlaps the Maximum Regression Surface (MRS 2) in the marine section and is composed of meandering and tide influenced fluvial deposits onshore. The HST 2 downlaps the Maximum Flood Surface 2 (MFS 2) and is very restricted onshore. Depositional Sequence 3 is late Cenomanian to mid-Turonian aged. TST 3 onlaps MRS 3 in the marine sections and is composed of meandering fluvial and estuarine deposits onshore. HST 3 downlaps MFS 3 in the marine section and is composed of carbonate deposits and their onshore siliciclastic counterparts. The depositional sequences 4 and 5 are entirely inserted within the context of the carbonate platform of the Jandaíra Formation and only transgressive and highstand system tracts were interpreted. Açu Formation, the main oil-bearing formation of the Potiguar Basin, is inserted into depositional sequences 1, 2 and 3 and is strongly affected by the lateral and vertical variations of the depositional systems. This low-resolution stratigraphic framework was used as reference for the stratigraphic analysis in reservoir scale of the onshore portion of TST 2 – in the fluvial domains of Açu Formation – and of the offshore portion of HST 1 – in the carbonate domains of Ponta do Mel Formation. The integrated analysis of rock, well logs and production data from a mature heavy oil field led to the interpretation of nine 4 th order depositional sequences that compose the TST 2. Such depositicional sequences are asymmetrical cycles where only the transgressive facies tracts are preserved, which are composed of a vertical sucession of channel and floodplain fluvial deposits, bouded at top by paleosol levels. The paleosols are the only register of the 4 th order regressive events and are the diagnostic features for the interpretation of the sequence boundaries. The paleosol levels and, consequently, the subaerial unconformities, are correlated throughout the oil filed and control the fluid flow within reservoirs, constituting their main vertical heterogeneities. Thus, this high-resolution chronostratigraphic framework and the LST 2 were used as the new reservoir zonation, replacing the former four lithostratigraphic zones. The new reservoir zonation allowed a more detailed reservoir characterization and led to a better representation of fluvial systems in 3D geological models and to the correction of mapping errors. The understanding of the fluid flow pattern within the reservoirs led to the closing of intervals that are harmful to production, as well as to the identification of remaining oil not produced, responsible for increasing the useful life of wells submitted to cyclic steam stimulation. Such results would not be obtained without the high-frequency chronostratigraphic zonation and reinforce the importance of high-resolution sequence stratigraphy as a tool for the improvement of mature oil fields recovery factors. The same methodology was used for the stratigraphic refinement of the carbonate deposits of HST 1, subdivided then into four 4th order genetic sequences. These sequences are composed of regressive and transgressive facies tracts which represent different paleogeographic configurations of the stacked carbonate platforms that compose the HST 1. Even though the HST 1 is not an oil-bearing interval, the proposed high-resolution chronostratigraphic framework is a good analogy for the study and description of stratigraphic heterogeneities in marine carbonate reservoirs. The multiscale methodology used in this work can be replicated in other stratigraphic intervals of Potiguar Basin, as well in any other sedimentary basin worldwide, where similar results can contribute to oil industry both in exploratory and reservoir scales.Master Thesis Análise estratigráfica das seções rifte e pós-rifte offshore na região do Campo de Pescada, Bacia Potiguar, Margem Equatorial Brasileira(Universidade Federal do Rio Grande do Norte, 2020-12-10) Brito, Letícia Hudson; Cordoba, Valéria Centurion; ; ; Antunes, Alex Francisco; ; Alvarenga, Renata dos Santos;The Potiguar Basin comprises one of the basins of the Cretaceous Continental Rifts system, an important event that occurred in the implantation of the Brazilian Equatorial Margin in Northeastern Brazil, evincing a noteworthy region of hydrocarbon accumulations. In order to better understand the tectonic-stratigraphic evolution of the Potiguar Basin, this work aims to contribute to the study of sedimentary record of the basin's rift and post-rift sections through the stratigraphic analysis of wells and seismic data. The study area is settled by the post-stack seismic volume 0208_PESCADA, in the Pescada Field region, comprising the wells and seismic lines scrutinized. The first phase of interpretation, the 1D analysis of six exploratory wells, made it possible to characterize the main lithofacies and depositional systems of Pendência, Pescada and Alagamar formations, and also to recognize the main units of sequence stratigraphy, such as cycles, key surfaces and systems tracts, with the definition of three depositional sequences on a regional scale. The 2D interpretation displays a structural arrangement consisting of grabens/semi-grabens, internal highs, and an important fault system of E-W to WNW-ESE trends that affect the layers and gave rise to additional structures of rift context. Furthermore, the stratigraphic framework enabled the identification of the main chronostratigraphic surfaces, seismic facies and seven tectonic system tracts that comprise the rift and post-rift sections and reflect the tectonic progress, from the initial rifting, two stages of high/low tectonic activity and a final stage of low tectonic proportions on the basin installation. The integration of all results reveals the effective application of sequence stratigraphy in the study area and verifies its good response in understanding the Potiguar Basin and Brazilian Equatorial Margin evolution.Master Thesis Análise estratigráfica da plataforma carbonática Ponta do Mel, Albo-Cenomaniano da Bacia Potiguar, NE do Brasil(2020-01-28) Medeiros, Ana Karoliny Alves de; Cordoba, Valéria Centurion; ; ; Sousa, Débora do Carmo; ; Neumann, Virgínio Henrique;This Dissertation intends to understand how the Ponta do Mel carbonate platform was implanted, to characterize its depositional model and its evolution in the light of modern stratigraphy, as well as to understand the stratigraphic relations with beneath, overlapping and contemporary units, from wells and seismic data. The focus area of this study corresponds to a belt in the offshore portion of the Potiguar Basin, which runs parallel to the shoreline, about 40 km from it. The carbonate rocks of the Ponta do Mel Formation date from the Late Albian and, similar to what occurs in the other basins of the Brazilian continental margin, their deposition is related to the separation events of the African and South American continents. In the stratigraphic analysis of the wells (1D analysis), it was possible to characterize carbonate lithofacies, that are the predominant, as well as mixed and siliciclastic lithofacies. It was also possible to individualize shallowing upward cylces and cycle sets, which were associated with the identified systems tracts. In the seismic stratigraphic analysis, in the same way, four seismic facies were visualized, which, in general, are related to the tractive processes involved in the deposition of the carbonate, mixed and siliciclastic lithofacies, defined in the 1D analysis. The integration of the results from the well data analysis to the seismic stratigraphic analysis allowed to understand that the studied interval, which coincides, in lithostratigraphic terms, with the Ponta do Mel Formation, represents a complete depositional sequence, here referred to as the Albian-Cenomanian Sequence, formed by the Lowstand Systems Tract (LST), Transgressive Systems Tract (TST), and Highstand Systems Tract (HST). The sedimentation history of the Ponta do Mel unit started from the deposition of siliciclastic and carbonate lithofacies in a shallow water platform environment, followed by the increase of the accommodation space, in a transgressive phase, where there was the deposition of a thick interval of deeper water lithofacies, represented mainly by calcilutites and pelitic rocks, for that, thus, at the end of this interval, facies of coarser granulation, represented mainly by thick calcarenites layers, and sometimes calcirrudites, started to dominate the platform scenario, denoting a regressive phase and thus ending the Albian-Cenomanian Sequence. These units and their boundaries make up a stratigraphic genetic framework, which contributes to the understanding of the model and depositional history that mark the installation and development of the Ponta do Mel carbonate platform during the Late Cretaceous in the Potiguar Basin.Doctoral Thesis Levantamento GPR e geoelétrico para a caracterização 3D de feições cársticas do tipo paleocavernas colapsadas na borda Oeste da bacia potiguar (RN/CE)(Universidade Federal do Rio Grande do Norte, 2014-02-25) Reis Júnior, João Andrade dos; Castro, David Lopes de; Filho, Francisco Pinheiro Lima; ; http://lattes.cnpq.br/9888320802954176; ; http://lattes.cnpq.br/8279954644750743; ; http://lattes.cnpq.br/8542629090745706; Araújo, Eduardo Henrique Silveira de Araújo; ; 1711036898410191; Silva, Lúcia Maria da Costa e Silva; ; 8612431024609774; Oliva, Pedro Andrés ChiraThis thesis presents the results of applying the Ground Penetrating Radar method (GPR) together with the resistivity method in an outcrop located on the western edge of the Potiguar Basin, NE Brazil. In the study area, a system of numerous collapsed paleocaves outcrops, partially exposed on a roadway scarp. The purpose of this research was to evaluate the performance and reliability of the abovementioned geophysical methods for imaging this karstic features and their complex internal geometry. For this purpose, methodological adjustments on data acquisition, processing and visualization were made. The results are presented in the form of geophysical sections and volumetric blocks of resistivity and GPR data. Electrical and petrophysical properties of outcropping geological units were obtained based on geophysical data and porosity and permeability measurements of rock samples. The collapsed paleocaves were interpreted based on the identification of high resistivity zones and high amplitude GPR reflectors. The paleocaves occurs in the shallow subsurface (vadose zone) and are filled with tufas, breccias and speleothems, whose average porosity is about 35%. The lateral contacts with carbonate soil and host rocks are marked by zone with low to medium resistivity (3-1,250 Ωm) and GPR reflections ranging from low amplitude to transparent. The paleocaves developed in both modern tufas deposits and Cretaceous carbonate rocks, which have now become weathered, forming a light gray soil. . A preliminary evolutionary model for the partially outcropping karstic features on the western edge of the Potiguar Basin is proposed based on both geophysical data and geological mapping. The formation processes of paleocaves propagated in depth to reach the calciferous sandstone layer, whose top represents the lower limit of these karstic features. The high resolution of GPR data allowed even identify distinct radar facies within the paleocaves, which possibly could be related to different types of carbonate materials that filled the paleocaves before and after their collapse. For better identification and delineation of subsurface paleocaves, mathematical operators were applied to synthetic and real GPR data, such as instantaneous frequency, amplitude and geometric attributes. The resulting radar sections assisted in characterizing the pattern of response of collapsed paleocaves regarding bedrocks and allowed to highlight the numerous fractures and contacts of clasts, caused x by the collapse of the paleocaves roof and walls. The GPR attributes contributed for imaging the 3D geometry of the collapsed paleocave system more accurately. Specially, the digital volumes of resistivity and RS Energy attribute show details of the complex 3D distribution of collapsed paleocavernas system. In depths of around 10 m, the paleocaves are more widely spaced and eventually isolated, sometimes vertically connected through shafts. However, in the near surface, the paleocaves occur interconnected by pipelines or coalesced, forming a paleocave system of hundreds of meters long in an area of 12,000 m2.Master Thesis Evolução estratigráfica da sucessão drifte regressiva da Bacia Potiguar (NE do Brasil)(2018-08-30) Cunha, João Augusto de Oliveira; Cordoba, Valéria Centurion; Sousa, Débora do Carmo; ; ; ; Silva, Carlos César Nascimento da; ; Kuchle, Juliano;The Potiguar Basin is located at the intersection between the east and equatorial Brazilian margins, covering areas of the Rio Grande do Norte and Ceará states. The sedimentary filling of this basin is represented by rocks that were deposited from Neocomian to Quaternary, during different tectono-sedimentary stages, being: Rift, Post-Rift and Drift. The last stage, in particular, designates a period of relative tectonic quiescence marked by more modest subsidence rates, which led to the deposition, in an open ocean context, of the Drift Supersequence. This supersequence is subdivided into the transgressive (lower portion) and regressive (upper portion) phases, by means of an important regional unconformity with upper Campanian age. The deposits of the regressive drift phase, target of this study, have their lithostratigraphy designated by the Agulha Group, which consists of the Barreiras, Tibau, Guamaré and Ubarana formations. The main purpose of this research was to perform a stratigraphic analysis of the regressive drift succession of the Potiguar Basin, from the perspective of sequence stratigraphy, aiming at a better understanding of its evolutionary process in the shelf, slope and basin regions. For this purpose, lithological information and gamma ray logs of five exploratory wells were used during a 1D analysis phase. Subsequently, the information from the previous phase helped to interpret seven seismic lines in the course of a 2D analysis phase. At end, the results of the 1D and 2D analyzes were integrated, leading to the individualization of five depositional sequences in the studied succession. In general, in more proximal portions, the two older sequences (1 and 2) were characterized by a preponderance of slope deposits, as well as by strongly progradational patterns. On the other hand, sequences 3, 4 and 5 have a more aggradational tendency and are represented by the sedimentation of shelf deposits. Concerning the Sequence 3, this is marked by a wide development of the carbonate sedimentation, whereas the Sequence 4 is characterized by a significant siliciclastic influx. The Sequence 5, in turn, has its depositional configuration defined by an important stage of global eustatic rise, which resulted in an extensive migration of the deposits from more distal portions to the shallower zones. Finally, in the deep marine context, the five depositional sequences show a similar framework, being denoted by the preponderance of hemipelagic successions, with the secondary presence of deposits associated with gravitational flows that occurs mainly in the two oldest sequences (1 and 2).Master Thesis Interpretação sismoestratigráfica em bacia oceânica profunda na margem equatorial brasileira: porção leste da Bacia Potiguar e Alto de Touros(2017-08-29) Fonseca, Júlia Carvalho Lannes Galvão; Vital, Helenice; Gomes, Moab Praxedes; http://lattes.cnpq.br/2086362176219605; http://lattes.cnpq.br/3595069999049968; http://lattes.cnpq.br/3262660692534529; Cordoba, Valeria Centurion; http://lattes.cnpq.br/8212523609187259; Nogueira, Mary Lúcia da Silva; http://lattes.cnpq.br/2546229173660779The Brazilian Equatorial Margin (BEM) deep-water regions present important geological features, although few explored beyond continental shelf-break. The main objective of this study is to characterize seismically syn and post-rift sequences and some seamounts which are part of the Fernando de Noronha Ridge (FNR) in deep-water basins offshore northeastern Brazil. We used 2D post-stack high resolution seismic sections to distingue syn and post-rift tectonic phases. The syn-rift stage is marked by discontinuous and locally parallel reflectors with low amplitude and low frequencies, which are offset by normal faults in half-grabens. The post-rift stage is characterized by continuous-parallel reflectors with low to high amplitude and frequency. The volcanic intrusions affected syn-rift and post-rift sequences and partially confines deep-water basins deposits. That happened once the pre-existent material and the material deposited after the seamount rises were partially confined by continental slope and one or two seamounts. Some volcanic vents reach the ocean bottom and form dome-shaped features. Both volcanic episodes seem to have created volcanoclastic deposit marked by disorganized/chaotic seismic pattern with few continuous reflectors, indicating interbedded magma flows with sedimentary material. Seismic interpretation indicates two periods of volcanic activity: (a) Early Eocene to Late Miocene for seamounts and, (b) Neogene, for volcanic vents. Although deeper water regions can hold key points about the BEM formation and on future could represent oil and gas reservoirs, deep-water basins deposits remain poorly studied in this portion of BEM. In this sense, our paper provides a first insight about deep-water basin deposits on syn and post-rift stages and how they are affected by volcanism on area.