Abstract: Uncertainty in 4-D imaging

Maria Kotsi, Alison Malcolm

Atlantic Geology

... this is time-lapse (4-D) seismic. Full Waveform Inversion (FWI) is a promising tool for 4-D analysis. The objective of FWI is to deliver a velocity model...

An example when not to rely on seismic velocities for a pre-drill pore pressure prediction

Search and Discovery.com

ABSTRACT: Gas Hydrate Studies in Kerala-Konkan Offshore Region of India; #90013 (2003)

Soma Innayya Reddi, Naresh Kumar Thakur, Ramesh Khanna, Kalachand Sain, Azhisur Ranganathan Sridhar, Pasupuleti Prasada Rao, Uma Shankar, A. Rastogi, Gautham Biswas

Search and Discovery.com

... alter the physical properties of host sediments to give detectable indications in seismic records. Full waveform pre-stack inversion attempted at a few...

Abstract: Turning-Ray Tomography and Tomostatics; #90224 (2015)

Babatunde Arenrin, Gary Margrave, and John Bancroft

Search and Discovery.com

... such as the case of a hidden layer. The velocity model from turning-ray tomography can be used for static correction, starting models for Full Waveform Inversion...

Abstract: Broadband Seismic Acquisition, Processing and Imaging using Dispersed Source Arrays; #90254 (2016)

Constantine Tsingas, Jewoo Yoo, Young Seo Kim

Search and Discovery.com

... recording of broadband seismic data and we demonstrate the methodology employed for optimum broadband processing in terms of deblending full waveform...

Abstract: Hessian Matrix Estimation from a Sub-Sampled Set of Columns; #90255 (2017)

Juan Sebastián López Guerra, Ana Ramirez, Sergio Abreo

Search and Discovery.com

... Abstract In the context of seismic Full Waveform Inversion (FWI), the Hessian matrix is used to determine the model resolution. Having an exact computation...

Abstract: Mapping Reservoir Stress Conditions using Hydraulic Fracturing Microseismicity; #90309 (2017)

Orlando J. Teran

Search and Discovery.com

... the dynamic response of the reservoir during and after stimulation. Focal mechanisms are derived using full waveform fitting techniques, and the ambiguity...

Abstract: Stampede Field-Reservoir Rock Physics and Seismic Imaging: What We Should See and What We Can See;

Wisley Martins

Search and Discovery.com

... bottom nodes (OBN) seismic, using Full Waveform Inversion (FWI) and least square reverse time migration (LSRTM) processing have remarkably improved...

Geohazard Detection in Deepwater Clastics Basin

Search and Discovery.com

Time-Lapse Refraction Seismic II: Field Examples

Martin Landrø, Lasse Amundsen

GEO ExPro Magazine

... that the technique has potential. One weakness is that it is hard to map the time-lapse anomalies precisely in depth. Fortunately, full waveform inversion techniques...

New insights into the Exmouth Sub-basin: Seismic acquisition, processing and imaging

Alexander Karvelas, Bee Jik Lim, Lianping Zhang, Haryo Trihutomo, Oliver Schenk, Sugandha Tewari

Petroleum Exploration Society of Australia (PESA)

... building consisted of two major stages: firstly, using full waveform inversion (FWI) to derive the nearsurface velocity field, and secondly, common image...

AAPG/SEG International Conference and Exhibition; - Abstracts, #90255 (2017).

Search and Discovery.com

Kronecker neural networks for the win: Overcoming spectral bias for PINN-based wavefield computation

Umair bin Waheed

International Meeting for Applied Geoscience and Energy (IMAGE)

... seismic applications, including migration and full waveform inversion (FWI). The majority of the computational cost associated with these applications...

3-D Velocity Model of Hydrocarbon Ventsite in Cascadia Region Offshore Vancouver Island, by Mikhail M. Zykov and Ross Chapman; #90035 (2004)

Search and Discovery.com

Seismic first arrival tomography for top salt velocity update: A case study in the Santos Basin, Brazil

Paulo H. B. Alves, Marco Cetale, Roger M. Moreira, Sérgio L. E. F. da Silva, Jorge Lopez

International Meeting for Applied Geoscience and Energy (IMAGE)

... such as full waveform inversion (He et al., 2022). Moreover, Santos et al. (2012) demonstrate the application of diffraction tomography, which helps...

Imaging of multiwell and multifiber walkaway DAS-VSP datasets in a CCUS demonstration project onshore Japan

Yuji Yamada, Shotaro Nakayama, Takuji Mouri, Manish Lal Khaitan, Philip Armstrong, Olga Podgornova

International Meeting for Applied Geoscience and Energy (IMAGE)

... with reliable confidence levels. The recorded datasets were also fed into elastic full waveform inversion (eFWI) to extract detailed subsurface...

Subsurface uncertainty quantification with deep geologic priors: A variational Bayesian framework

Ashutosh Tewari, Brent Wheelock, Jacob Clark, Dallas Foster, Matthew Li, Youssef Marzouk

International Meeting for Applied Geoscience and Energy (IMAGE)

... to update the posterior. Alternatively, complete seismic information can be assimilated in a full-waveform inversion framework. Therefore, in the second stage...

UK North Sea: A Step-change in Imaging Quality

Steven Bowman, Ramez Refaat, Per Helge Semb

GEO ExPro Magazine

... acquisition, the OBN data was imaged using advanced demultiple, TimeLag Full-Waveform Inversion (TLFWI, Wang a) Towed-streamer b) OBN Figure 3...

Seismic Foldout: Geological understanding based on new data is required to unlock potential in the Vøring Basin

Jens Benfeeldt, Reidun Myklebust, TGS

GEO ExPro Magazine

... broadband data using a widetow triple source configuration and two long tails for FWI (full-waveform inversion) processing. This new dataset...

Full-waveform inversion with time-dependent receiver-extension: An efficient inner loop optimization

Mustapha Benziane, Romain Brossier, Ludovic Métivier, Serge Sambolian

International Meeting for Applied Geoscience and Energy (IMAGE)

...Full-waveform inversion with time-dependent receiver-extension: An efficient inner loop optimization Mustapha Benziane, Romain Brossier, Ludovic...

Drilling Risks Associated with Hydraulic Fractures and Reactivating Faults due to High Mud Weight/Pore Pressure and Miti (Paper B13)

A. A. Bal, D. Maya, K. K. Kyi, R. Guha, M. I. Gabreldar, D. Abang Indi

Geological Society of Malaysia (GSM)

... bedding (see dip track and Figure 2) and a fracture (fault) imaged using the full waveform acoustic data. The imaged facture intercepts the borehole...

Velocity model building assisted by potential field methods: A case study from the Red Sea

Wilson Ibanez, Federico Ceci, Giuseppe Bancala, Andrea Sirtori, Luciana De Luca, Miquel Marin, Vivian Robertson, Briseida Palacios, David Korte

International Meeting for Applied Geoscience and Energy (IMAGE)

.... These updates are conducted both before and after additional full-waveform inversion (FWI) updates to further enhance the refinement of the velocity...

Time-Lapse Geophysics for Mapping Fluid Flow in Near Real Time: Results from a Controlled Mesoscale Experiment

Roelof Versteeg

Special Publications of SEPM

... in of full-waveform GPR inversion has not been solved: while which the data are stored in a database and a user requests we can model GPR data fairly...

Physics-based preconditioned multidimensional deconvolution in the time domain

David Vargas, Ivan Vasconcelos, Matteo Ravasi, Nick Luiken

International Meeting for Applied Geoscience and Energy (IMAGE)

... by including preconditioners that honor the expected physics of waveform data. We apply this approach to full-waveform trans- Figure 1: (a) Sub-salt...

Chapter 8: Amplitude Versus Offset

Tom Wittick

North Texas Geological Society

... for determining Poisson’s ratio over a given depth interval. Without a full-waveform sonic log one must estimate Poisson’s ratio for the strata...