Optimized downward continuation for the one-way wave equation in TTI media

Cosmin Macesanu, Faqi Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... crosstalk between unassociated order of reflections has been one of the challenges in the joint migration of primaries and surface multiples. Imaging using...

Abstract: Automatic High-Density Constrained Velocity Picking; #90211 (2015)

Emil Blias

Search and Discovery.com

..., 1981, 1988, 2003, 2005a, 2005b) that deviation between stacking and RMS velocity depends on where lateral velocity changes occur. The main reason...

Abstract: Joint OBN and 3-D DAS-VSP Data Acquisition and Processing in East China Sea; #91204 (2023)

Gang Yu1, Haibo Liu, Zhonglin Cao, Junjian Li, Jianguo Li, Yuanzhong Chen, Guangming He, Junjun Wu, Ximing Wang

Search and Discovery.com

... separation, velocity analysis and imaging. According to the characteristics of offshore 3-D VSP downgoing multiples, the offshore 3-D VSP downgoing multiple...

Results of Exploration, Browse Basin, North West Shelf, Western Australia

I. Willis

Petroleum Exploration Society of Australia (PESA)

... with stacking velocities close to the primary velocities in the deeper target zone. The lack of "move-out" discrimination between multiples and primaries makes...

Upside down Rayleigh-Marchenko imaging: Towards a practical exact redatuming scheme for ocean bottom acquisitions

Ning Wang, Matteo Ravasi

International Meeting for Applied Geoscience and Energy (IMAGE)

... to handle both primaries and freesurface multiples. Despite being practically attractive, such an approach relies on single-scattering assumptions...

ABSTRACT: Exploring the Pre-Khuff in Qatar: The Value of an Integrated Approach, by Harvey, Craig; Wicker, Jorg; Molinaro, Matteo; Zahran, Mamdouh E.; Taylor, Andrew; Churchill, James; #90141 (2012)

Search and Discovery.com

Results of Exploration, Browse Basin, Northwest Shelf, Western Australia

T.R. Barter, P. Maron, I. Willis

Circum Pacific Council Publications

... in the deeper target zone. The lack of moveout discrimination between multiples and primaries makes it very difficult to attenuate the multiples effectively...

Fast

Search and Discovery.com

Australia: New Imaging of the Vulcan Sub-basin

Tony Pedley, Richard Palmer, Polarcus, Spectrum

GEO ExPro Magazine

...; • Shallow high velocity hydrocarbon related diagenetic zones; • Coherent noise – multiples and refractions; • Complex faulting leading to poor...

Multiple, Diffractions and Diffracted Multiples in the South China Sea: How Dense Does Our Acquisition Geometry Need to be? (Geophysics Paper 16)

Rosemary K Quinn, Lynn B Comeaux

Geological Society of Malaysia (GSM)

...Multiple, Diffractions and Diffracted Multiples in the South China Sea: How Dense Does Our Acquisition Geometry Need to be? (Geophysics Paper 16...

Exploration of Part of the Northwest Shelf of Australia (A Case History)

J. S. Thomas, E. O. Nestvold, A. Crostella

Southeast Asia Petroleum Exploration Society (SEAPEX)

... velocity profile is shown in Figure 11c. On this line Tertiary carbonate section generates multiples which interfere with the primaries within and below...

A Step Change in Seismic Imaging … Using a Unique Ghost Free Source and Receiver System; #41449 (2014)

Per Eivind Dhelie, Robert Sorley, Torben Hoy, David Lippett

Search and Discovery.com

... the primaries are shown in a) and imaging using the multiples are shown in b). Conclusions A unique ghost free source and receiver system has been demonstrated...

Practical Use of Borehole Seismic in Exploration; Goals and Shortcomings

F. Sandnes, L. Nustt, S. G. Henry

Indonesian Petroleum Association

... that both upgoing and downgoing events, primaries and multiples are computed. This is especially useful in VSP interpretation as multiples and multiple...

Full-waveform inversion derived prestack reflectivity gathers

Jian Mao, Xin Cheng, Denes Vigh, James Xu, Qiaofeng Wu

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Since FWI utilizes the full wavefield which contains primaries, multiples, ghosts and transmitted waves, the inverted FWI model contains more...

Composition of seismic facies: A case study

Stale Emil Johansen

AAPG Bulletin

...:10.1190/1.1443942.Myhre, A. M., O. Eldholm, and E. Sundvor, 1982, The margin between Senja and Spitsbergen fracture zones: Implications from plate tectonics...

Next-generation resolution through multiparameter FWI imaging

Tom Rayment, James McLeman, Karen Dancer, Tim Burgess

International Meeting for Applied Geoscience and Energy (IMAGE)

.... This least-squares imaging solution uses primaries, multiples and ghosts to deliver higher-resolution images than traditional imaging algorithms...

Abstracts: Oilsands: Not Your Average Seismic Data; #90173 (2015)

David Gray

Search and Discovery.com

... and primaries are separated out. This model clearly shows that any high moveout events in the reservoir zone are converted waves, and multiples are basically...

Passive Margins: Interpretation of West Africa Line C

R. Sheriff

AAPG Special Volumes

... was the only process applied to affect multiple attenuation, and it is not effective unless multiples and primaries have different stacking velocities...

Key Technologies for Processing of Seismic Data in Gas Cloud Area, Bohai Bay Basin, #42093 (2017).

Xia Tongxing, Ming Jun, Liu Lei, Zhou Xuefeng, Liu Hongxing, Liu Xuetong

Search and Discovery.com

... (Right) MPFI Fig.6 Comparing DWT velocity with sonic log and VSP interval velocity, for three wells DWD is specially designed to suppress multiples...

Latest imaging advancements in Suriname shallow waters

Jing Yang, Zhihua Sun, Zhihua Su, Bei Hu, Nicolas Chazalnoel

International Meeting for Applied Geoscience and Energy (IMAGE)

... reflection data and strong crosstalk between different orders of multiples. MWD (Wang et al., 2011; Huang et al., 2015) is an effective supplement...

Explainable AI: Can neural networks recognize first arrivals after wave separation?

Yanwen Wei, Zhenyu Zhu, Jicai Ding, Yichuan Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... on their kinematic and dynamic characteristics. For instance, the method using travel-time differences eliminate multiples by leveraging the time gaps between...

Modeling-based amplitude recovery (MBAR)

Yonghe Sun, Zhemin Tan, Jeff Nealon, James Davenport, Mark Fan, Yuli Zhang, Brian Church

International Meeting for Applied Geoscience and Energy (IMAGE)

... successfully mitigate adverse effects (10~30% amplitude damage) caused by Radon attenuation of residual multiples...

An optimal aperture crosscorrelation imaging condition for Marchenko imaging

Xiaochun Chen, Yezheng Hu, Yukai Wo, Weiping Cao, Xuri Huang

International Meeting for Applied Geoscience and Energy (IMAGE)

... of single scattering (Oristaglio, 1989), treating internal multiples as primaries. Inevitably, these methods usually suffer from imaging artifacts due...

Demultiple for Wide-Tow Broadband Acquisition in a Shallow Water Environment: A Case Study from the NW Shelf, Australia

Mike Hartley, Shuo Ji, Alex Browne

Petroleum Exploration Society of Australia (PESA)

... dataset in the Northern Carnarvon basin, North West shelf Australia. We demonstrate that the removal of shallow water multiples can be optimized...

Image processing of jointly acquired 3D DAS-VSP data with an OBN survey in the Middle East

G. Yu, H. Liu, Y. Zhang, H. Chen, X. Li, L. Duan, G. Cambois, J. Cowell, J. Mason, Y. Chen, J. Wu

International Meeting for Applied Geoscience and Energy (IMAGE)

..., and S. Lu, 2010, Imaging of primaries and multiples using a dual- sensor towed streamer: 80th Annual International Meeting, SEG, Expanded Abstracts, 3187...