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Periodicity of multiples

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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-065
... condition for forecasting the onset of the dynamics events (Priestley, 1981; Lu et al., 2012). Upstream Oil & Gas AE signal kHz machine learning eigenvalue contribution rate eigenfrequency time series precursor periodicity Artificial Intelligence isrm international symposium component...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1221
...-period multiples energy in short–offset 2D streamer data from Gulf of California. Multiple attenuation methods include deconvolution, Linear Radon (Tau-P), Parabolic Radon Transform, and 2D Surface Related Multiple Elimination (SRME). Multiple attenuation entailed selection of most apt method or...
Proceedings Papers

Paper presented at the 1999 SEG Annual Meeting, October 31–November 5, 1999
Paper Number: SEG-1999-1445
... ABSTRACT No preview is available for this paper. seg 1999 SEG 1999 Expanded Abstracts SEG 1999 Expanded Abstracts SEG 1999 Expanded Abstracts SEG 1999 Expanded Abstracts 1999. Society of Exploration Geophysicists ...
Proceedings Papers

Paper presented at the 2002 SEG Annual Meeting, October 6–11, 2002
Paper Number: SEG-2002-2198
... anelastic processes during propagation. Another potentially important component of the wavelet model is the apparent attenuation caused by short-period multiples. Here we examine whether these two processes act similarly enough to be combined into a single “effective attenuation" operator for signal...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, November 15–17, 2011
Paper Number: IPTC-14535-MS
... 2: Migrated stacked sections showing structures from South China Sea. Left 2D SRME has been effective at attenuating water-period multiples prior to migration. Right residual multiple of shallow diffractions remains. NB. Data are from the same survey, with the same processing sequence applied...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201348-MS
... to have an effect on production rates when the period approaches one year, causing the production rate denominator to be too large. The cash flow multiple is the ratio of the transaction purchase price to the annualized (12-month) cash flow, and is dimensionless. The annualized cash flow can...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426847
... multiples are period of internal multiples and it equals a half-wavelength predicted with correct time and approximate amplitude up to of the wavelet at zero offset. Traveltimes t2 and t0 are functions of midpoint and offset, and their variations with offset and midpoint are obtained as follows: | t0...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2998444
... in the industry. A careful estimate of multiples and their subsequent subtraction is common practice in preserving primaries and aid in interpretation of seismic data. Most established methods use two characteristics of multiples, delayed arrival time with respect to primaries, and periodicity. An...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2996255
... Using model of attenuation in the prediction of internal multiples: data-driven workflow and field data example Frederico Xavier de Melo*, Jing Wu, Zhiming James Wu, Clément Kostov, Maud Cavalca, WesternGeco Summary We present a data-driven methodology for prediction of internal multiples that...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997719
... elements in which the gather is sparse. Red dashed lines show the edges of mute in this domain used to suppress the multi- ples. Predictive Deconvolution Once the sparse hyperbolic radon filter has been applied to the data, the remaining traces only contain the peg-leg multiples with period of ttissue and...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1172
... interaction between multiple floating wind turbines at offshore wind farms. In this paper, the mutual interference of two floating offshore wind turbines is presented. Compared to the onshore wind turbine at the same wind condition, the energy efficiency of single floating offshore wind turbine decreases...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17724656
... our multichannel prediction filters by minimising the energy between the input data P and the multiples FP, how- ever, the term FP doesn t constitute all types of short-period multiples. The term FP can only model the water-layer mul- tiples and the source-side peg-leg multiples. To model the receiver...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5880003
... Summary For most of the present multiple migration methods need to separate multiples from the original data firstly, which is a time-consuming and high-cost job. So the joint migration method of primaries and surface-related multiples by replacing the source function with the recorded data...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5910366
... migration (Verschuur et al., 1992; Berkhout et al., 1997). However, multiples are also real reflections from the subsurface with smaller reflection angles, longer travel path and wider illumination range. Considering the periodicity of the surface-related multiples, the longer of the time is recorded in the...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17672058
... enough to obscure deeper primary events with geological interest, which may become nearly invisible. There are different kinds of multiples ranging from various long path multiples to short path multiples. Long period multiples appear as separate events in the seismic section, whereas short period...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17739249
... initial 2D testing, full 3D interbed de-multiple was applied assuming that the dominant multiple periodicity at the target level is related to two shallow reflectors which have approximately 138ms TWT separation. Full waveform inversion velocities were used to model the reflectivity of the shallow...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17795124
... ABSTRACT In some geological settings, internal multiples are a common problem at target levels in seismic data. In the Norwegian Continental Shelf, there is a relatively simple overburden in terms of structural complexity, where the propagating waves tend to reverberate and generate strong...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201312-MS
... Abstract Results of multiple years of periodic aerial methane surveys over Pioneer Natural Resources’ operations footprint, comprising approximately 680,000 acres in the Permian basin, are presented, including impacts to operational efficiency, cost, and methane emissions mitigation. Aerial...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17660839
... horizon-based prediction for the Dammam-related internal multiples. Figure 6 zooms on the stack results shown in Figure 4 for the reservoir level below the Gotnia horizon. Attenuating short- period multiples conformable to the Gotnia horizon is of particular relevance to reservoir characterization. A...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5882419
...). Figure 4: Sea-floor bathymetry for the field test area. The full stack is shown in Figure 5; notice the significant contamination from multiples, in particular water-layer multiples with a periodicity of about 120 msec, with several bounces (high-order multiples) and characteristic alternation of...

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