Full-volume 3D seismic interpretation methods: A new step towards high-resolution seismic stratigraphy

Paumard, Victorien; Bourget, Julien; Durot, Benjamin; Lacaze, S.; Payenberg, Tobi; George, Annette D.; Lang, Simon

doi:10.1190/int-2018-0184.1

Cited by 32 publications

(9 citation statements)

References 39 publications

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“…The 3D seismic surveys were interpreted using PaleoScan™, a seismic interpretation software allowing the semi-automatic interpretation of entire 3D seismic volumes. Based on the workflow described by Paumard et al (2019a), hundreds of seismic horizons (i.e., chronostratigraphic surfaces; sensu Mitchum et al, 1977;Vail et al, 1977) were extracted in the interval of interest for each seismic volume. Four key regional stratigraphic surfaces, based on the sequence stratigraphic framework of Marshall and Lang (2013), were then extracted, namely the: (1) Barremian K30.2 MFS; (2) Aptian K40.0 SB; (3) base Cenozoic T10.0 SB; and (4) seafloor (Fig.…”

Section: Methodsmentioning

confidence: 99%

Origin of seafloor pockmarks overlying submarine landslides: Insights from semi-automated mapping of 3D seismic horizons (North West Shelf, Australia)

Riera¹,

Paumard

Gail³

et al. 2022

Marine and Petroleum Geology

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Pockmarks are geohazards that can impact offshore developments, and an understanding of their formation assists in determination of their physical characteristics and in the prediction of their future behaviour. This study documents how the presence of submarine landslides -either on the seafloor or buried -can favour pockmark formation through the characterisation of two pockmark fields from the Australian North West Shelf. Analysis was carried out through an innovative workflow combining full-volume interpretation of exploration 3D seismic data and semi-automated mapping of seismic horizons. The Gorgon Pockmark Field (GPF) extends over ~125 km 2 in water depths ranging from 210 to 480 m. It contains ~500 pockmarks with diameters of ~150-200 m. The pockmark field overlies a submarine landslide and was likely created by the expulsion of fluids and/or liquefied sediment during or after the formation of the landslide. The Carnarvon Pockmark Field (CPF), located 100 km southwest of the GPF, covers around ~150 km 2 in water depth ranging from 680 to 930 m. It contains ~250 pockmarks, each having a diameter of ~250-300 m. The CPF developed on a buried paleo-landslide. While the seafloor pockmarks and the paleo-landslide are physically disconnected by a sedimentary drape, seafloor pockmarks are abundant above the paleo-landslide and present a characteristic morphology, then suggesting that fluids circulating through the paleo-landslide induced the formation of the seafloor pockmarks. Study of the Gorgon and Carnarvon pockmark fields presents new evidence that submarine landslides -either on the seafloor or buried -can control the development of pockmarks over huge areas of the seafloor.

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Section: Methodsmentioning

confidence: 99%

Origin of seafloor pockmarks overlying submarine landslides: Insights from semi-automated mapping of 3D seismic horizons (North West Shelf, Australia)

Riera¹,

Paumard

Gail³

et al. 2022

Marine and Petroleum Geology

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“…The process consists of standardized steps such as the creation of a 3D relative geological time model from the original seismic volume, leading to extraction of horizon stacks. The standard workflow was used to obtain a high resolution interpretation, which consists of three main steps, from the model‐grid calculation to the horizon extraction (Paumard et al, 2019). The following parameters have been used to calculate the model grid: patch size of 7, polarity (peak and trough), correlation threshold of 30%.…”

Section: Methodsmentioning

confidence: 99%

Seismic stratigraphy and sedimentology of a Miocene carbonate platform in Luconia, South China Sea

et al. 2020

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The internal architecture and evolution of isolated carbonate buildups rely on multiple forcing factors, including tectonics and eustatic fluctuations. These parameters control the developmental phases of carbonate buildups such as initiation, growth, and termination stages, and give insights into other morphologic patterns such as backstepping and exposure events. The current study shows the evolution of a Middle Miocene isolated carbonate buildup of Central Luconia in the southern South China Sea, and describes it from large‐scale to very fine detail (km to mm) utilizing newly acquired (2016) 3D seismic data along with core lithofacies and thin sections. The buildup morphology and seismic facies are linked to core facies that can help to uncover the complex development of the carbonate platform. Core‐seismic calibration was used to create maps illustrating carbonate depositional settings for each stratigraphic unit. Here, we identified five seismic units that constitute the main stratigraphic stages of buildup development: (a) initiation as several isolated buildups, (b) coalescence, progradation, and aggradation, (c) aggradation and retrogradation associated with minor backstepping events and major karstification events, (d) retrogradation associated with major backstepping events, and (e) drowning stage. Our results demonstrate that Miocene reefal evolution and buildup architecture in Central Luconia were distinctly affected by diverse endogenic and exogenic processes. The initiation of localized carbonate growth appears to be strongly controlled by the morphology of the pre‐carbonate basement of Central Luconia where the SSW–NNE horst and graben structures were inherited from the poly‐stage opening of the South China Sea during the Early Miocene. Furthermore, sea‐level fluctuations, local and regional tectonic events during the Middle Miocene controlled the rates of accommodation changes, which directly impacted the stratigraphic architecture of the platform. The detailed seismic and sedimentological study documented in this work will benefit the understanding of the paleogeographic and stratigraphic evolution of carbonate buildups in the Luconia region of SE Asia, and in the current and future exploration for substantial conventional resources.

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“…The reflection-derived bathymetry extraction was performed using PaleoScan™, a full-volume seismic interpretation software. The interpretation is performed semi-automatically using similarities between adjacent seismic traces to generate an unlimited number of horizons within a chronostratigraphic framework (Paumard et al, 2019a). In this case, the workflow focused on the upper 500 ms (TWT, two-way time) of each seismic survey to optimize the resolution of the seafloor horizon.…”

Section: Data Processingmentioning

confidence: 99%

Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets

Lebrec

Paumard

O’Leary

et al. 2021

Earth Syst. Sci. Data

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Abstract. High-resolution bathymetry forms critical datasets for marine geoscientists. It can be used to characterize the seafloor and its marine habitats, to understand past sedimentary records, and even to support the development of offshore engineering projects. Most methods to acquire bathymetry data are costly and can only be practically deployed in relatively small areas. It is therefore critical to develop cost-effective and advanced techniques to produce regional-scale bathymetry datasets. This paper presents an integrated workflow that builds on satellites images and 3D seismic surveys, integrated with historical depth soundings, to generate regional high-resolution digital elevation models (DEMs). The method was applied to the southern half of Australia's North West Shelf and led to the creation of new high-resolution bathymetry grids, with a resolution of 10 × 10 m in nearshore areas and 30 × 30 m elsewhere. The vertical and spatial accuracy of the datasets have been assessed using open-source Laser Airborne Depth Sounder (LADS) and multibeam echosounder (MBES) surveys as a reference. The comparison of the datasets indicates that the seismic-derived bathymetry has a vertical accuracy better than 1 m + 2 % of the absolute water depth, while the satellite-derived bathymetry has a depth accuracy better than 1 m + 5 % of the absolute water depth. This 30 × 30 m dataset constitutes a significant improvement of the pre-existing regional 250 × 250 m grid and will support the onset of research projects on coastal morphologies, marine habitats, archaeology, and sedimentology. All source datasets are publicly available, and the methods are fully integrated into Python scripts, making them readily applicable elsewhere in Australia and around the world. The regional digital elevation model and the underlying datasets can be accessed at https://doi.org/10.26186/144600 (Lebrec et al., 2021).

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Full-volume 3D seismic interpretation methods: A new step towards high-resolution seismic stratigraphy

Cited by 32 publications

References 39 publications

Origin of seafloor pockmarks overlying submarine landslides: Insights from semi-automated mapping of 3D seismic horizons (North West Shelf, Australia)

Origin of seafloor pockmarks overlying submarine landslides: Insights from semi-automated mapping of 3D seismic horizons (North West Shelf, Australia)

Seismic stratigraphy and sedimentology of a Miocene carbonate platform in Luconia, South China Sea

Towards a regional high-resolution bathymetry of the North West Shelf of Australia based on Sentinel-2 satellite images, 3D seismic surveys, and historical datasets

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