Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Robert T. Langan"'
Autor:
Robert T. Langan
Publikováno v:
ASEG Extended Abstracts. 2013:1-3
SUMMARY The oil and natural gas energy supply situation changed dramatically in the United States and in North America between 2000 and 2013. A new ability to extract economically both natural gas and oil from shale resource rocks has recently made t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1254a405b238c534610ed83bdc84195e
https://doi.org/10.1071/aseg2013ab385
https://doi.org/10.1071/aseg2013ab385
Autor:
Kenneth P. Bube, Robert T. Langan
Publikováno v:
GEOPHYSICS. 73:VE321-VE335
We sometimes encounter situations in seismic imaging in which knowing the position of key reflectors between wells would be very useful. In many crosswell data sets, both transmission and reflection traveltimes for selected reflectors can be picked.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5acc529e7f47013afef05092fdd648b0
https://doi.org/10.1190/1.2969777
https://doi.org/10.1190/1.2969777
Autor:
Robert T. Langan, Kenneth P. Bube
Publikováno v:
GEOPHYSICS. 73:VE337-VE351
In most geometries in which seismic-traveltime tomography is applied (e.g., crosswell, surface-reflection, and VSP), determination of the slowness field using only traveltimes is not a well-conditioned problem. Nonuniqueness is common. Even when the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::559fc83c7720d206ac1b71a8002973ea
https://doi.org/10.1190/1.2969460
https://doi.org/10.1190/1.2969460
Publikováno v:
GEOPHYSICS. 71:T129-T135
We present a procedure that solves the eikonal equation for general anisotropic media. It allows one to incorporate arbitrary shapes and types of anisotropic formations. We use an expanding-wavefront scheme and explicit tracking of group velocity pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59d83be1688df50193911806719cbd74
https://doi.org/10.1190/1.2235563
https://doi.org/10.1190/1.2235563
Publikováno v:
GEOPHYSICS. 70:U37-U45
It is difficult to resolve the ambiguity between velocity and reflector depth using reflection traveltimes when the aperture is small, as is common for deep reflectors. For velocity perturbations that are independent of the vertical variable, there i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e9e2fcead8d422bc910e9d6da114619
https://doi.org/10.1190/1.1925751
https://doi.org/10.1190/1.1925751
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
Publikováno v:
GEOPHYSICS. 63:1604-1617
A carbon dioxide (CO2) injection pilot project is underway in Section 205 of the McElroy field, West Texas. High‐resolution crosswell seismic imaging surveys were conducted before and after CO2 flooding to monitor the CO2 flood process and map the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86da491820a719d0e59a4d326237e840
https://doi.org/10.1190/1.1444457
https://doi.org/10.1190/1.1444457
Autor:
Robert T. Langan, Kenneth P. Bube
Publikováno v:
GEOPHYSICS. 62:1183-1195
Least squares or [Formula: see text] solutions of seismic inversion and tomography problems tend to be very sensitive to data points with large errors. The [Formula: see text] minimization for 1 ≤ p < 2 gives more robust solutions, but usually with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d5fa93497c34e001e142a7abd46ebf0
https://doi.org/10.1190/1.1444219
https://doi.org/10.1190/1.1444219
Publikováno v:
Journal of Geophysical Research: Solid Earth. 100:12449-12458
Seismic reflection tomography obtains an estimate of the subsurface slowness field and the location of strong reflectors by minimizing the difference between measured travel times from seismic reflection events and the corresponding travel times comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::206501a8eb212e6f5ad52a592357c013
https://doi.org/10.1029/95jb00920
https://doi.org/10.1029/95jb00920
Autor:
Richard Nolen-Hoeksema, Spyros K. Lazaratos, Robert T. Langan, Mark Van Schaack, James W. Rector, Jerry M. Harris
Publikováno v:
GEOPHYSICS. 60:667-681
A carbon dioxide flood pilot is being conducted in a section of Chevron’s McElroy field in Crane County, west Texas. Prior to [Formula: see text] injection, two high‐frequency crosswell seismic profiles were recorded to investigate the use of sei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f1c8006b573c443145048122dae7ebd
https://doi.org/10.1190/1.1443806
https://doi.org/10.1190/1.1443806