Challenges and opportunities in pre‐stack depth imaging of legacy seismic data: an overthrust belt case study

2005 ◽  
Author(s):  
Walt Ritchie ◽  
Mihai Popovici ◽  
Moritz Fleidner
Keyword(s):  
Seismic Data ◽  
Depth Imaging ◽  
Challenges And Opportunities ◽  
Overthrust Belt

Time reprocessing and depth imaging of vintage seismic data: the Southern Adriatic Sea case study

2020 ◽  
Author(s):  
Edy Forlin ◽  
Giuseppe Brancatelli ◽  
Nicolò Bertone ◽  
Anna Del Ben ◽  
Riccardo Geletti
Keyword(s):  
Seismic Data ◽  
Model Building ◽  
Adriatic Sea ◽  
Imaging Techniques ◽  
Low Cost ◽  
Velocity Model ◽  
Seismic Section ◽  
P Waves ◽  
Depth Imaging

<p>Nowadays depth imaging of seismic data, using different migration schemes (rays tracing or waves equation methods) and different techniques for velocity model building (i.e. grid or layer-based tomography, isotropic or anisotropic velocity field) is a standard approach for the earth’s subsurface characterization. When dealing with low fold vintage data, acquired with outdated technologies, modern processing algorithms may fail. On the other hand, the reprocessing of these old data with modern techniques may lead to an improvement of quality and resolution, allowing a more accurate interpretation of the investigated geological features. It is important to note that a lot of vintage data were acquired in areas with no recent surveys or currently subject to exploration restrictions. Therefore, available vintage data could be of great importance for all the stakeholders involved in geophysical exploration. We present a case study about the reprocessing of low fold marine seismic data that were acquired in 1971 in the Otranto Channel (Southern Adriatic Sea, Italy).</p><p>The first part of the work consists of a modern broadband sequence processing in the time domain, that allowed us to obtain a pre-stack time migrated seismic section; in the second part, depth imaging has been achieved through a pre-stack depth migration (PSDM). Reliable interval p-waves velocity model has been obtained using two tomographic approaches: grid tomography and layer-based tomography; for both, we carried out several iterations of the refinement loop, consisting of migration, ray tomography, residual velocity analysis, velocity model update.</p><p>The results show significant improvements compared to the original vintage section, in terms of resolution and signal to noise ratio. Moreover, depth imaging and velocity modeling added further information (e.g., reliable interval p-waves velocity model, real geometry and thickness of the main geological units). This study confirms that applying the up-to-date processing and imaging techniques to vintage data, their geophysical and geological value is enhanced and renewed at a relatively low cost.</p>

PROCESSING AND IMAGING OF MARINE SEISMIC DATA FROM THE JEQUITINHONHA BASIN (BAHIA, BRAZIL)

2016 ◽  
Vol 33 (3) ◽  
Author(s):  
Lourenildo W.B. Leite ◽  
J. Mann ◽  
Wildney W.S. Vieira
Keyword(s):  
Seismic Data ◽  
Sedimentary Basins ◽  
Study Results ◽  
Marine Seismic ◽  
Present Case Study

ABSTRACT. The present case study results from a consistent processing and imaging of marine seismic data from a set collected over sedimentary basins of the East Brazilian Atlantic. Our general aim is... RESUMO. O presente artigo resulta de um processamento e imageamento consistentes de dados sísmicos marinhos de levantamento realizado em bacias sedimentares do Atlântico do Nordeste...

scholarly journals Towards Sustainable Mobility? The Influence of the COVID-19 Pandemic on Romanian Mobile Citizens in Spain

2021 ◽  
Vol 13 (7) ◽  
pp. 4023
Author(s):  
Silvia Marcu
Keyword(s):  
Sustainable Development Goals ◽  
Human Mobility ◽  
Sustainable Mobility ◽  
The Sustainable Development ◽  
New Models ◽  
Challenges And Opportunities ◽  
Development Goals ◽  
Depth Interviews

Using the case study of Romanians in Spain, this article highlights how the COVID-19 crisis presents both challenges and opportunities when it comes to human mobility and sustainability. Drawing on in-depth interviews with mobile people during the period of lockdown and circulation restrictions, and in accordance with the objectives of the Sustainable Development Goals (SDGs), the paper advances and contributes to the relevance of sustainability and its impact on people’s mobility in the context of the COVID-19 pandemic. I argue that even in the midst of the crisis, sustainable ways may be found to promote and protect human mobility. The paper raises the way sustainability acts as a driver, gains relevance and influence, and contributes to the creation of new models of resilient mobility in times of crisis. The conclusions defend the respect for the SDGs regarding human mobility and emphasise the role of people on the move as sustainable actors learning to overcome distance and the barriers to their mobility during the pandemic.

scholarly journals Towards a Digital Workerism: Workers’ Inquiry, Methods, and Technologies

NanoEthics ◽  
2021 ◽  
Author(s):  
Jamie Woodcock
Keyword(s):  
Digital Technology ◽  
Communication Technologies ◽  
Technology Studies ◽  
Call Centres ◽  
Challenges And Opportunities ◽  
Digital Work

AbstractDigital technology is playing an increasingly visible role in the organisation of many people’s work—as well as large parts of their lives more broadly. The concerns of emancipatory technology studies, or other critical accounts of technology, are often focused on finding alternative uses of technology. In many workplace contexts—from call centres to platform work—the imperatives of capital are deeply written into these technologies. Yet at the same time, many capitalist technologies are playing a key role facilitating emerging workers’ struggles. For example, in the case study examined here, Deliveroo drivers rely on communication technologies like WhatsApp to organise against algorithmic management. Drawing on an ongoing workers’ inquiry, this paper seeks to consider what a workerist approach to digital technology can add to these debates. The paper outlines the challenges and opportunities for a “digital workers’ inquiry,” considering how this approach combines research with organising. The argument is divided into two main parts: first, the need for inquiries in digital work and the importance of these and second, how the process of inquiry and co-research (and the methods these involve) can be adapted and refined with digital technology. By starting the critique of technology from the workplace, this paper proposes a workerist account of how technologies can be destroyed or re-appropriated, starting from a reading of workers’ struggle.

scholarly journals The Impact of COVID-19 on Hospitality Industry in Greece and Its Treasured Santorini Island

2021 ◽  
Vol 13 (14) ◽  
pp. 7906
Author(s):  
Nikola Medová ◽  
Lucie Macková ◽  
Jaromir Harmacek
Keyword(s):  
Social Impact ◽  
Tourism Sector ◽  
Challenges And Opportunities ◽  
Multiple Variables ◽  
Hospitality Sector ◽  
Tourism And Hospitality ◽  
The Impact ◽  
Further Development

This paper focuses on the dynamic of the recent upheaval in the tourism and hospitality sector due to the COVID-19 epidemic in Greece and Santorini island. It uses the case study of a country one-fourth of whose GDP consists of tourism. We compare the available statistical data showing the change in variables in the previous years with 2020 and look into the new challenges and opportunities posed by the drop in the numbers of visitors and flights. We focus mainly on the economic and social impact on the destination and possible future scenarios for further development in the area. Data show a significant effect of the pandemic on multiple variables, such as the long-term trend of the importance of tourism sector in GDP in Greece, the number of flights and visitors to Greece and Santorini island, and the contribution of tourism and travel to GDP. Based on the available data, we also construct three foresight scenarios that describe the possible futures for Santorini island in terms of the pandemic evolution. These scenarios may help various stakeholders and policymakers to be better prepared for different developments that may appear.

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