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Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-2122
... machinery of compressed sensing ( Cand`es et al. (2006); Donoho (2006)) naturally leads to a robust method of anti-aliasing the modeled wavefield in the time domain by solving a de-noising problem, an idea introduced in Hennenfent and Herrmann (2006). In this paper, we describe an algorithm for computing...
Proceedings Papers

Paper presented at the 1st ISRM Congress, September 25–October 1, 1966
Paper Number: ISRM-1CONGRESS-1966-247
... und Spannung so vertraut geworden, dass wir im taglichen Leben ein Gefuehl dafuer entwickelt haben und darum geneigt sind, ihre wirkliche Bedeutung zu vergessen. Es erscheint auch angebracht zu erwahnen, dass der Begriff Spannung eigentlich zwei Grössen umfasst, die man wohl voneinander unterscheiden...
Proceedings Papers

Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1330
...-offset profile pef reservoir characterization coefficient interpolation Interpolating aliased end-on GPR data Saulo S. Martins , Observato´rio Nacional, Jandyr M. Travassos, COPPE, UFRJ, and Jefferson C. Simo es, NUPAC, UFRGS (Brazil). SUMMARY This work addresses the almost unavoidable aliasing...
Proceedings Papers

Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-0062
... in the system results in no advan tage to using eld arrays. 2. Groundroll spatial wavelengths that do not alias into the passband of the 3D velocity lter do not upset the needs of the velocity lter. Th us the eld arrays presen t no adv an tage. The aliases that pass into the v elocity lter passband...
Proceedings Papers

Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-2558
... decomposition is then performed for the traces at each wavelet scale. At the (slowness dependent) aliased scales, the locations of the wavelet coeÆcients related to the signals are approximated from those in an adjacent unaliased scale. The corresponding amplitudes are es- timated from the current aliased scale...
Proceedings Papers

Paper presented at the 1994 SEG Annual Meeting, October 23–28, 1994
Paper Number: SEG-1994-1282
... mesh point in an image space are uncontaminated and correct (assuming no data or opera- tor aliasing). For example, a single migrated output trace at a well location may be entirely accurate without having to es- timate any adjacent migrated traces. This target-oriented capability of Kirchhoff...
Proceedings Papers

Paper presented at the 1984 SEG Annual Meeting, December 2–6, 1984
Paper Number: SEG-1984-0464
...- essing. A recently developed reflection seismograph, the EG&G Geometries ES-2420, includes these features in an easily portable. compact system. The unique system archi- tecture of the ES-2410 permits data to be stored into memory rather than being written directly to tape. allowing very high sample...
Proceedings Papers

Paper presented at the 2000 SEG Annual Meeting, August 6–11, 2000
Paper Number: SEG-2000-0794
... aliased migration images The stationary phase migration is suitable for migration ve locity analysis not only because it provides specular ray related parameters but also because it speeds up the it erativ e migrations by migrating only the traces within the Fresnel zones of the specular rays...
Journal Articles
J Pet Technol 68 (12): 43–44.
Paper Number: SPE-1216-0043-JPT
Published: 01 December 2016
.... Halabe, Schlumberger; and S. Pedraza, SPE, prepared for the 2015 SPE Asia Pacific Oil and Gas Conference and Exhibition, Bali, Indonesia, 20 22 October. The paper has not been peer reviewed. 44 JPT DECEMBER 2016 complete paper. Once the baseline is es- tablished, several checks are necessary to perform...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17680565
... ABSTRACT We present a regularization method, Regularization by Unaliased Slowness Estimation (RUSE), that regularizes non-uniformly sampled, spatially aliased data. This method assumes that the data are locally a combination of planar events. We test this algorithm on both a synthetic plane...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17558742
... of the seismic wave field often occurs in seismic surveys and aliasing is always a potential issue es- pecially for some of the noise types. Because of this, methods that are able to properly interpolate potentially aliased data are of great interest - i.e. methods that will recover the wave field without being...
Proceedings Papers

Paper presented at the 1999 SEG Annual Meeting, October 31–November 5, 1999
Paper Number: SEG-1999-1441
... A ~ in equa- tion (8) will not exist. Course sampling is no remedy since this giv es aliasing in the spatial domain. The solution is pro vided by employing the following assumptions: After NMO-correction the primary re ection signal depends only slightly on the o set coordinate. The undesired events...
Journal Articles
J Pet Technol 72 (01): 64–65.
Paper Number: SPE-0120-0064-JPT
Published: 01 January 2020
... computed from the hydrophone array data indicated a potential casing leak at 1555 m MD. A possible hypothesis for the fluid loss- es within the A/B annulus is a potential failure of the packer at 4306 m MD. Con- sequently, this area was investigated with a moving pass across the packer area and a series...
Journal Articles
J Pet Technol 69 (08): 67–68.
Paper Number: SPE-0817-0067-JPT
Published: 01 August 2017
... awareness creates a higher risk of poor decision making. Human factors become even more im- portant when considering the way the drilling industry conducts business, es- pecially in the current downturn mar- ket (e.g., short-term contracts, person- nel with varying expertise changing out regularly...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1976
Paper Number: OTC-2647-MS
...OFFSHORE TECHNOLOGY CONFERENCE 6200 North Central Expressway Dallas, Texas 75206 R aTe 2647 Material Testing Selectio~, Welding, and Nondestructive Gu ide lin es J gr 0 f f s h0 reM ob i leD r i I lin g Units By Bruno L. Alia, Michael F. Wheatcroft, and Charles L. Null, Americ~n Bureau of Shipping...
Journal Articles
Mar Technol SNAME N 13 (02): 176–183.
Paper Number: SNAME-MTSN-1976-13-2-176
Published: 01 April 1976
... mm (2.00 iu.) in Thickness and Unde Ordinary Applications Plates 51.0 mm (2.00 in. ) in thickness and under, where intended for ordinary applications, are to be of the following grad es : Grade AH Acceptable up to and including 19.0 mm (0.75 in.) in thickness. Acceptable over 19.0 mm (0.75 in.) up...
Journal Articles
J Ship Prod Des 7 (03): 153–162.
Paper Number: SNAME-JSP-1991-7-3-153
Published: 01 August 1991
... is dictated by the operation flow times and the material and component lead times. When the lead time is in error, two possible problems exist. If the lead time estimate is excessive, the funds requirement will be es- tablished unnecessari ly early. This may lead to an over- statement of the lead time funding...
Proceedings Papers

Paper presented at the 1988 SEG Annual Meeting, October 30–November 3, 1988
Paper Number: SEG-1988-0649
.... The spatial sampling, which is controlling resolution and spatial alias& is embedded in the DX in a given offset plane. Therefore, with nonnal data collection of a shot at each receiver location the DX will not be the CDP spadng but will be the shot spacing. In other words, you may see spatial aliasing...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13952750
... and Travas- sos (2015). The resultant 7 trace CMP gathers are very sparse and severely aliased. We fill in missing traces and deal with alias through a trace interpolation algorithm based on adaptive prediction error filtering (PEF) and regularized nonstationary autoregression (Liu and Fomel, 2011). The PEFs...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 11–15, 1988
Paper Number: PETSOC-88-39-54
... analysis techniques. This work demon~trates th~t the use of afr:erf!ow rates derJ.ved from acous~lcally measured liquid levels C3n be used ~G interpl:e.r:: pressure buildup r::es~s for pumping oil wells_ Several differ~n[ superposition mc~hods 3re demonsr::rated with f~eld examples. 54-' INTRODUCTION...

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