Zobrazeno 1 - 10
of 12
pro vyhledávání: '"William S. Harlan"'
Autor:
William S. Harlan
Publikováno v:
GEOPHYSICS. 79:V217-V225
Conventional moveout analysis stretches and squeezes traces to increase the coherence of reflected amplitudes in prestack seismic gathers. Higher order residual moveouts require increasingly difficult scans of semblances with extra dimensions or pick
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21ff87d48a68ead0ab97ff81afcf9d25
https://doi.org/10.1190/geo2013-0479.1
https://doi.org/10.1190/geo2013-0479.1
Publikováno v:
GEOPHYSICS. 73:VE1-VE3
In the last decade, much of 3D seismic signal processing has been replaced by the single imaging process called prestack depth migration. Rapid advances in resolution and illumination have changed the way we explore, delineate, and monitor reservoirs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05531eb64551c10e0b18788abdc99735
https://doi.org/10.1190/1.2969441
https://doi.org/10.1190/1.2969441
Prestack depth migration is a useful tool for understanding complex structures in the North Sea and elsewhere around the world. Advances in computer speed and algorithm design have made depth migration of most 2-D data sets practical with current tec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb5589776c3c30d9363690a3472b656a
https://doi.org/10.1016/s0928-8937(06)80051-2
https://doi.org/10.1016/s0928-8937(06)80051-2
Autor:
William S. Harlan
Publikováno v:
SEG Technical Program Expanded Abstracts 1994.
A tomographic inversion adjusts seismic reflection amplitudes to remove distortions caused by spatial variations in the transmission properties of the overlying earth. These variations create distinctive patterns on displays of reflection amplitude v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05e234bfdb854212a2bb793802169cb6
https://doi.org/10.1190/1.1932055
https://doi.org/10.1190/1.1932055
Publikováno v:
SEG Technical Program Expanded Abstracts 1991.
Reflection traveltime tomography has evolved away from layered models toward independent parameters for velocities and reflectors. We introduce a simple method of optimizing interval velocities and common-reflection points simultaneously. Interval ve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa7d30ea6286c3774eff95d3077591af
https://doi.org/10.1190/1.1888775
https://doi.org/10.1190/1.1888775
Publikováno v:
SEG Technical Program Expanded Abstracts 1991.
Many methods of depth migration velocity analysis emphasize Well-focused images. Others linearize and invert the effect of perturbed velocities on migrated images. We prefer to use developed methods of reflection traveltime tomography by converting p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31e6deb5241851452f25a99de08c1c89
https://doi.org/10.1190/1.1888776
https://doi.org/10.1190/1.1888776
Autor:
William S. Harlan
Publikováno v:
SEG Technical Program Expanded Abstracts 1990.
A cross-well, shear-wave data set posed two problems: 1) wells are separated by only 12.5 wavelengths, so thin raypaths are a poor approximation; 2) data are recorded through a high-velocity limestone surrounded by low-velocity shales. Waves are bent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfcbe8c4cefa373bb1a2ace8b248192b
https://doi.org/10.1190/1.1890369
https://doi.org/10.1190/1.1890369
Simultaneous velocity filtering of hyperbolic reflections and balancing of offset‐dependent wavelets
Autor:
William S. Harlan
Publikováno v:
GEOPHYSICS. 54:1455-1465
Hyperbolic reflections and convolutional wavelets are fundamental models for seismic data processing. Each sample of a “stacked” zero‐offset section can parameterize an impulsive hyperbolic reflection in a midpoint gather. Convolutional wavelet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89c0be5d5342a0cf42b34faffc55b624
https://doi.org/10.1190/1.1442609
https://doi.org/10.1190/1.1442609
Autor:
William S. Harlan
Publikováno v:
GEOPHYSICS. 53:932-946
Inversion of the band‐limited one‐dimensional VSP response is nonunique because impedance functions with very different statistics produce equivalent responses. Least‐squares methods of inversion linearly transform noise and tend to produce imp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::457d6ed72f6e4409710e711f858552d6
https://doi.org/10.1190/1.1442530
https://doi.org/10.1190/1.1442530
Autor:
William S. Harlan
Publikováno v:
SEG Technical Program Expanded Abstracts 1989.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79d1a34652977ceb38a64ec3e694278a
https://doi.org/10.1190/1.1889819
https://doi.org/10.1190/1.1889819