1-20 of 161 Search Results for

Treatment of coherent linear noise by conventional processing

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the 1984 SEG Annual Meeting, December 2–6, 1984
Paper Number: SEG-1984-0451
..., whereas in the conventGonally processed section. only faint hints of these steep features are present. The same is true for the relative imaging of the diffraction whose apex is at location ,4. at about I.2 s. The two sections differ as much in their treatment of the linear, coherent noise...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-2541
... The basis of our method uses SVD (singular value decomposition) to compute eigenimages that represent coherent noise in a localized time-space window without the alignment function. The mathematical treatment of using SVD to compute eigenimages has been extensively discussed in the literature (Kirlin...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0413
... will receive the same static treatment as the seismic survey. Firstly, we built an initial isotropic velocity model, using existing well control and time horizon maps consistent with the lithology column in Figure 3. Secondly, we estimated the Thomsen’s delta parameter (Figure 4) from the mismatches between...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-W21-06
... (such as P-waves), which is at- tenuated in the interferometric process. However, considering that body waves decay and travel faster than surface waves, the proposed inversion algorithm is still valid without much special data treatments. ACKNOWLEDGMENTS We thank KAUST for its support and specifically...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-0970
... sample i. Denote the linear stack of P- and S-wave along the moveout curves as which enhances the coherent P and S waves while suppress the random noise. Unlike the conventional exploration seismology, the polarization of the P and/or S waves, even projected on the ray coordinate, could have different...
Proceedings Papers

Paper presented at the SPE Intelligent Energy International, March 27–29, 2012
Paper Number: SPE-149785-MS
... drivers, and offer strategies and tactics for well completion methods and optimized hydraulic fracture treatment designs. A probabilistic approach helps quantify uncertainty and assess risk for individual field development plans. Figure 8 Well Performance Methodology Important results from...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3194636
... the structure oriented filtering treatment with seismic data in Penglai 19-3 oilfield, the SNR of seismic section is improved obviously, and the fault feature is more obvious(Figure 1b). Meanwhile the 10.1190/segam2019-3194636.1 Page 1993 © 2019 SEG SEG International Exposition and 89th Annual Meeting...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3198045
... valid without much special data treatments. ACKNOWLEDGMENTS We thank KAUST for its support and specifically the seismic wave analysis group members for their valuable insights. We thank KACST for acquiring the data and we also thank Ro- man Pevzner for discussions. For computer time, this research used...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 11–14, 2019
Paper Number: SPE-197955-MS
... among the stacks. All correlation maps of angle stacks ( Fig.9 ) show significant improvement by the dedicated processing treatments to the partial stacks. Correlation lessening was observed at farther angle stacks. It can be explained by wavelet transformation caused by NMO stretch and/or residual...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1980
Paper Number: OTC-3808-MS
... spectra. Under certain assump- tions about the characteristics of signal and noise, the ratio of the signal power spectrum to random noise power spectrum is related to the coefficient of coherence by This deterioration of recorded primary energy caused by the spatial averaging of conventional receiver...
Proceedings Papers

Paper presented at the 1993 SEG Annual Meeting, September 26–30, 1993
Paper Number: SEG-1993-0263
... the fracture well. During the frequency self-noise above approximately 200 Hz [4]. two hours of formation treatment, more than 1200 micro-seisms Due to the limitations presented by the conventional wall- with signal-to-noise ratios in excess of 20 dB were observed. The locking geophone, an advanced borehole...
Proceedings Papers

Paper presented at the SPE Rocky Mountain Regional/Low-Permeability Reservoirs Symposium and Exhibition, March 12–15, 2000
Paper Number: SPE-60316-MS
... Coherence Plot was constructed (using the closure stress of 4,480 psi) and appeared to identify After-Closure Pseudo-Linear Coherence and Pseudo-Radial Coherence (Figure 5). SPE 60316 APPLICATION OF AFTER-CLOSURE ANALYSIS FOR IMPROVED FRACTURE TREATMENT OPTIMISATION 5 Step 4: Pseudo-Linear Flow Verification...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5899893
... al., 2008). However, blended datasets require specific treatment before being processed using conventional techniques (Davies et al., 2013). In this paper, we present the deblending work carried out on a blended 2D 4-component (4C) OBC shallow water dataset acquired in Malaysia with time dithering...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5876692
...). The sensor array straddled the frac zone and extended about 1000 feet above and below. Microseismic data was recorded and processed in near real- time in the field to generate event locations and magnitudes. Nearly 100 stages from the four treatment wells were monitored. A subset of 4600 high-quality events...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-0457
...., 1996), which is accurate in complex media without being prohibitively expensive. Two key processing stages for such data are the removal of coherent noise and the estimation of the upper part of the velocity model. These tools are a modified Tau-p filter and a tomographic inversion, respectively...
Proceedings Papers

Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-0901
... to further reduce the effect of noise on the results. Finally, synthetic and real data examples are presented to demonstrate its ability to resolve large statics. Inversion theory Wiggins et al (1976) pointed out that residual statics problem from CDP data is ideal for treatment as a general linear inverse...
Proceedings Papers

Paper presented at the 1984 SEG Annual Meeting, December 2–6, 1984
Paper Number: SEG-1984-0454
... section. only faint hints of these steep features are present. The same is true for the relative imaging of the diffraction whose apex is at location ,4. at about I.2 s. The two sections differ as much in their treatment of the linear, coherent noise as in that of signal. In the convention- ally processed...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1239
... processing. Superiority of this method over conventional approach has been investigated and evaluated through some application to synthetic seismograms and field data. Importance of careful data processing has been emphasized throughout this study. Numerical treatment in frequency domain has some merits...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, March 26–28, 2013
Paper Number: IPTC-16571-MS
... stimulated under different frac fluids (Slickwater, Linear Gel, and X-link), proppants (100mesh, 40/70 C), perforation (Limited Entry), and pump rate (Domain Frac vs. High Pump Rate). Microseismic Processing Because the deep Observation Well is only 6m away on surface from the Treatment well, the pumping...
Proceedings Papers

Paper presented at the 1996 SEG Annual Meeting, November 10–15, 1996
Paper Number: SEG-1996-1674
... &an simply applying a cosmetic remedy to the sympton provides a more accurate analysis and consequently a potentially more effective treatment. We have attempted to apply such a geologic cause- geophysical response focused processing paradigm to an area in the Red Sea which is plague~ though previously...

Product(s) added to cart

Close Modal