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Interpolación Sismica Pre-Stack En Un Area Compleja De Piedemonte
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, VII Congreso de Exploración y Desarrollo de Hidrocarburos (Simposio de La Geofísica: Integradora del Conocimiento del Subsuelo), Nov 2008, cp-261-00014
Abstract
BP and ECOPETROL acquired 450 km2 of 3D seismic information in a complex Piedemonte Llanero zone to the North of Cusiana and Cupiagua fields Colombia. In these projects, the original design geometry was strongly affected by numerous surface obstacles principally due to environmental restrictions. For this reason, it is necessary to use to a regularization technique to guarantee the success of key processes such as velocity analysis and pre-stack migration. In this work, shot points were interpolated between those originally recorded. In this way the distance between sources was reduced from 80 m to 40 m in order to obtain new data equivalent to 184% of the original shooting, increasing coverage by 60%. Original tomography statics and elevations were part of the data interpolated in this case. Coverage maps as well as distance-azimuth attributes of the new geometry were generated and partial stack was examined by offset range. Examining certain offset planes it is possible to observe how missing lines become completed at the same time that large empty spaces are filled. This can be observed in the original seismic time slices.