2 August – Full day
Workshop on Computational Geophysics
Co-chairs: André Bulcão (Petrobras), Paulo Souza (Independent HPC Consultant) and Pedro Mário Silva (NVIDIA)

The objective of this workshop is to discuss the computational aspects of the most relevant Geophysical tools and techniques. The main topics to be discussed are: Development of Geophysical Software, Numerical Methods, High Performance Computing, Machine Learning, Big Data & Analytics, and Visualization. The workshop will be in an informal setting.
9:00 – 9:15: Opening
9:15 – 10:45h: Round table - Moderator: Prof. Armando Cavanha Filho – FGV
Participants: Andreia Leão (IAGC), Antônio Celso Borges (Coordenador CGMAC/IBAMA), Danilo Giroldo (Vice Reitor FURG), Felipe Kury (Diretor ANP), Jorge Camargo (Presidente IBP), Regis Pinto Lima (Gerenciamento Costeiros/MMA)
10:45 – 12:00: Debate
12:00 – 12:15: Closing – Brazilian Geophysical Society (SBGf)

3 August – 9am
Workshop Geophysics Horizons - 2nd edition - The role of Geophysics in the Sustainable Development.

This workshop purpose is to find solutions for sustainable development of the geophysics activities in Brazil, focusing mainly on the exploration industry and oil and gas production.
The first edition of the Horizons of Geophysics Workshop, carried out in November 2016, was a starting point for a building up journey, involving society, represented by public servants of several government areas, academic entities, non-governmental organizations, dedicated to environment preservation, technicians and managers of geophysical companies and oil and gas industry operators.
This second edition, promoted by SBGf, intends to enlarge the debate, providing everybody, through a survey, the opportunity to previously express about which factors, and their intensity, impact on the attractiveness of investments for the country.

3 August - Morning
Uncertainty quantification in quantitative reservoir characterization
Co-Chairs: Dario Grana (University of Wyoming) and Tapan Mukerji (Stanford University)

Quantitative reservoir characterization aims to estimate reservoir properties from geophysical data, by combining rock physics, seismic modeling, and inverse methods, along with geological knowledge. Static reservoir model predictions are generally affected by several sources of uncertainty. These sources include errors, noise, and limited resolution of the geophysical measurements, approximations of the physical relations, and spatial heterogeneity. Another important source of uncertainty is the geologic scenario uncertainty. A mathematical framework for the quantification of uncertainties in the data and models and for the propagation of uncertainty in reservoir model predictions is then required, in order to assess the risk in reservoir forecasts. In this workshop, advanced modeling approaches and uncertainty quantification methods will be discussed with the goal of developing new strategies and best practices to improve the reservoir description and the model predictions. Topics will include (but are not limited to) approaches for addressing:

  • - Geologic uncertainties
  • - Depositional and structural uncertainties
  • - Seismic imaging and velocity uncertainties
  • - Rock physics uncertainties
  • - Seismic inversion uncertainties
  • - Flow simulation uncertainties

8:30-8:55 Tapan Mukerji, Introduction: Why bother quantifying uncertainty?
8:55-9:20 Paulo Johann, Reservoir Geophysics Characterization and Monitoring - Uncertainties and Good Practices
9:20-9:45 Alessandra Davolio, Seismic history matching and PEM uncertainties
9:45-10:10 Erick Talarico, Multiple response nonlinear regression applied to simultaneous density, Vp and Vs rock physics calibration and related statistical analysis
10:10-10:30 Coffee Break
10:30-10:55 Leandro Passos de Figueiredo, Fernando Bordignon and Rodrigo Exterkoetter, Impacts of the seismic inversion parameters on the reservoir volume and connectivity
10:55 – 11:20 Alexandre Maul, The Impact of Salt Overburden Characterization over Brazilian Presalt Reservoir
11:20 – 11:45 Dario Grana, Why do we need stochastic approaches for seismic inversion?
11:45-12:00 Open discussion and closing remarks

3 August - Afternoon
FWI and Least Squares Migration: Past, Present and Future
Chair: Biondo Biondi (Stanford University)

The objective is to discuss the main challenges in applying FWI and LSM in media which involve high complexities such as sub-salt areas. The main topics to be discussed are: reflectivity and background velocity as unknowns, elastic migration and inversion, gradient preconditioning, FWI with wavefield reconstruction, velocity model building, data and model parametrization, and the value of FWI and LSM information in seismic intepretation.
13:55-14:10 Opening - Djalma Manoel Soares Filho (Petrobras)
14:10-14:30- Are we close to multi-scale simultaneous (and robust) seismic imaging? (Biondo Biondi (Stanford University)
14:30-14:50 Accelerating Convergence and Enhancing Image Quality of Least Squares Migration with Migration Deblurring Filters, Gerard Schuster (KAUST)
14:50-15:10 Optimized Broadband Imaging and Inversion for complex media, Nizar Chemingui (PGS)
15:10-15:30 Reconstructed Full Waveform Inversion and Imaging, Chao Wang (ION)
15:30-15:55 Open Discussion
15:55-16:05 Coffee Break
16:05-16:25 Back to Hawai – updating velocity low wavenumbers, Claudio Guerra (Petrobras)
16:25-16:45 Unraveling complexities of the subsurface with full waveform inversion and least squares migration, Adel Khalil (CGG)
16:45-17:05 Elastic FWI with multicomponent data, Gustavo Catão Alves (Petrobras)
17:05-17:25 Open Discussion
17:25/17:30 Closing, Gustavo Catão Alves (Petrobras)

3 August - Afternoon
Salt tectonics in divergent margin sedimentary basins
Chair: Webster Mohriak, UERJ

This session will focus on geological and geophysical studies on the geodynamic evolution of Atlantic-type continental margins, focusing on rift and salt structures and their impact on petroleum exploration. The selected works will present models of extensional tectonics for the development of rift basins and inception of oceanic crust, with analysis of halokinetic processes and recent advances on imaging of rift and salt structures based on seismic and potential field methods, as well as analogies with field outcrops. The methodologies may involve plate reconstructions, tectono-stratigraphic analysis and characterization of magmatic events affecting the syn-rift, transitional and post-breakup phases of basin evolution.

13:55-14:15 Salt Tectonics in the South Atlantic Divergent Margin Basins: Interpretation Challenges, Webster Mohriak (UERJ)
14:15-14:35 Offshore Brazil: Salt-related prospectivity and the next licensing rounds, Marina Abelha (ANP)
14:35-14:55 Case studies of salt basins in Atlantic divergent margins: impact of interpretation on the velocity modelling for seismic imaging and time-depth conversion, Frank Bulhões (Petrobras)
14:55-15:15 Some remarks on salt interpretation for velocity model building in Brazilian basins, Fabien Marpeau (CGG)
15:35-15:45 Coffee Break
15:45-16:05 SDRs or presalt synrift graben? – Insight from an integrated case study of presalt reflectors in Campos Basin, offshore Brazil, Quincy Zhang (TGS)
15:45-16:05 Accelerated imaging in a complex salt system – A case study from the Campos Basin, Neil Hurst (IONGEO)
16:05-16:25 Architecture of Passive Margins in salt-dominated basins, Hermann Lebit (PGS)
16:25-16:45 Evaporitic salt charaterization using seismic and well data, Josué Sá da Fonseca (Petrobras)

3 August - 2pm
Geodynamic Contributions to Petroleum Exploration: Past, Present and Future
Chair: Victor Sacek, USP

The understanding of the geodynamic processes that shaped our planet are of uttermost importance to correctly interpret the main features on Earth’s surface, including the formation and evolution of sedimentary basins. Therefore, along with geophysical and geological observations, geodynamic models of how the crust and mantle behave through the geological timescale is an essential tool in the risk analysis in petroleum exploration. In this workshop we will discuss about the main advances and challenges in analytical and numerical models of geodynamic processes and the main contributions to the oil industry. 14:00-14:25 Opening - Avanços em modelagem numérica no estudo de processos geodinâmicos, Victor Sacek (USP)
14:25-14:45 Evolução de tectônica de ambientes hiperestendidos: implicações exploratórias, Victor Hugo Pinto
14:45-15:05 A descoberta do pré-sal como agente catalizador de estudos geodinâmicos, Adriano Viana (Petrobras)
15:05-15:25 Ricardo Trindade
15:25-16:00 Round Table

3 August - Afternoon
Round Table: Geophysical challenges of the integration of altimetric and bathymetric reference levels for coastal flooding risk assessment
Participants: Prof. Dr. Roberto Teixeira Luz (IBGE/UERJ), Dr. Régis Pinto de Lima, (MMA), Paulo Cesar Colonna Rosman (COPPE/UFRJ), Jorge Dagoberto Hildenbrand (Sociedade Brasileira de Geofísica)