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Technical Content

Technical Abstract
SEG - Society of Exploration Geophysicists | Barry Hung, Xusong Wang, Ying Peng Phan, Riaz Alai, Kefeng Xin, Yi He, Nurul Nadzirah Rahman, Wai Hoong Tang © 2015 SEG | October

We propose a broadband processing workflow that is purely data driven and applicable to both conventional towed and variable depth towed marine streamer data. Three important ingredients of our workflow are highlighted: (1) deghosting; (2) FS-QTomo and A-QTomo; (3) prestack depth Q migration (Q-PSDM) ...

Technical Abstract
SEG - Society of Exploration Geophysicists | John Pendrel © 2015 SEG | October

We demonstrate by example, a joint deterministic inversion – facies estimation procedure which makes minimal prior assumptions and obviates the need for the building of a low frequency model (LFM) which interpolates log curves between wells. We then apply the same procedure to geostatistical ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Feng Yang, Ronan Sablon, Robert Soubaras © 2015 SEG | October

Contrary to conventional seismic that focuses in a narrow band in middle frequencies, broadband seismic aims at acquiring information within the whole bandwidth emitted by the source. A good knowledge of the source signature is thus of paramount importance in broadband processing. However, the ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Botao Qin, Thibaut Allemand, Gilles Lambare © 2015 SEG | October

A great deal of effort has been expended to improve the amplitude reliability of migration. The similarity of reverse time migration (RTM) to the gradient of full waveform inversion (FWI) indicates that preserved amplitude RTM can help improve FWI. We develop the theoretical derivation ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Mark Skinner, Philip Smith, Andrew Irving, Jeoveth Muhongo, Arash Jafargandomi, Celine Lacombe, Stuart Long, Joseph Jackson, Matthew Wingham, Martin Riviere © 2015 SEG | October

Here we develop and present a 4D processing flow including ΔSΔR (the sum of the mis-positioning of the sources and receivers from baseline to monitor survey) thresholding and parallel pairwise binning with transfer operators to improve the quality of the 4D products while optimizing ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Peter Mesdag, Reza Saberi, C. Mangat © 2015 SEG | October

In this paper a method is described to update the low frequencies of the elastic parameters coming from pre-stack time lapse inversion in a data driven manner. In the process no assumptions are made regarding the nature of the reservoir changes. Also no assumptions ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Zheng Chang, Xuhui Luo, Jie Shu, Huifeng Zhu, Mervyn Parry, Kelly Kolb, Yvonne A Paisant-Allen © 2015 SEG | October

Data from towed streamer surveys in shallow water depths are usually contaminated by different orders of seafloor reflections called water-layer-related multiples (WLRMs). The model-based water-layer demultiple (MWD) method effectively removes WLRMs. The initial development of 2D MWD was followed by a 3D implementation to ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Ky Wang, Bin Deng, Zhigang Zhang, Lingli Hu, Yan Huang © 2015 SEG | October

Full waveform inversion usually fails to update the sediment velocity in close vicinity of the top of salt (TOS) because of the strong velocity contrast between the sediment and salt. This phenomenon is a common challenge in practice, and it is not yet well ...

Technical Abstract
SEG - Society of Exploration Geophysicists | Ziqin Yu, Ping Wang, Brad Wray, Suryadeep Ray, Wei Zhao, Zhigang Zhang © 2015 SEG | October

Low-frequency seismic data are crucial for the success of full waveform inversion (FWI) used in velocity model building. Marine acquisition technologies have evolved to increase low-frequency seismic signals. However, significant low-frequency noise, often caused by water flowing across the streamers, still alters the signal-to-noise ...

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