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4-D SEISMIC [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2009-08-07

English

Subject field(s)
  • Seismic Prospecting
  • Geological Prospecting
  • Oil and Natural Gas Extraction
CONT

Three-dimensional (3D) seismic surveys utilise 2D grids of seismic sources and receivers deployed on the ground surface. The seismic response of the ground is recorded as a time series corresponding to each source-receiver pair, and the wave propagation time becomes the third dimension of the data set. ... If a 3D seismic survey is repeated at several time intervals, this historical time (as opposed to the wave propagation time) becomes a fourth dimension, hence the name 4D or time-lapse seismic. The 4D approach allows a detailed description of the evolution of the reservoir, but the overall cost of the survey escalates rapidly by repeating conventional 3D surveys.

PHR

Time-lapse seismic data, experiment, measurement, modeling, response, result, survey, test.

Key term(s)
  • time lapse seismic

French

Domaine(s)
  • Prospection sismique
  • Prospection géologique
  • Extraction du pétrole et du gaz naturel
CONT

Afin d'obtenir une image plus précise et plus fiable du sous-sol, on emploie la technique de la sismique 3D [...] Elle permet même souvent de repérer directement les hydrocarbures dans les couches géologiques. Les récepteurs sont placés en nappes afin de construire une image du sous-sol en volume (en trois dimensions). La technique de la sismique 4D va plus loin encore, en faisant intervenir la quatrième dimension : le temps. Sur un gisement en production, on effectue plusieurs enregistrements successifs de sismique 3D, à intervalles de temps réguliers. La comparaison des enregistrements permet ensuite de suivre l'évolution du gisement pendant sa production.

Key term(s)
  • séismique 4D
  • séismique répétitive

Spanish

Campo(s) temático(s)
  • Prospección sísmica
  • Prospección geológica
  • Extracción de petróleo y gas natural
CONT

[...] los grupos de producción pueden utilizar levantamientos sísmicos aplicando la técnica de lapsos de tiempo - sísmica 4D - a fin de rastrear cambios de saturación y de presión, para un mejor emplazamiento de los pozos de relleno [...]

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