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7th Middle East Geosciences Conference and Exhibition
Manama, Bahrain
March 27-29, 2006
Seismic
Data
Set
1 Exploration Group, Kuwait Oil Company (K.S.C.), POBox 9758, Ahmadi, 61008, Kuwait, phone: +965
3989111 - 72309, fax: +965 3984397, [email protected]
2 Exploration, Kuwait Oil Company, P.O. Box: 9758, Code No. 61008, Ahmadi, KUWAIT, 61008, Kuwait
3 Kuwait Oil Company (K.S.C.)
4 Exploration, Chevron Kuwait, Ahmadi, Kuwait
Automated processes for generating spatially consistent fault planes are available in a 3D seismic
interpretation
environment - but not in 2D.
Automation of this process in a mixed 2D and 3D seismic
environment was achieved by applying existing Landmark
technology so that it became possible to simultaneously process some 450 assigned faults and 14 horizons interpreted on
mixed 2D and 3D
seismic
data
.
The maximum spatial extent of the 2D and 3D data
sets was used to define a conventional 3D volume. Interpreted horizons
were imported into the empty 3D volume from respective original projects regardless of their 2D or 3D origin. Horizon
interpolation ensured seamless horizons between 2D and 3D
data
. Correlated and assigned fault segments were imported
in an identical manner.
All interpretation
data
are thus defined by spatial coordinates in a common 3D
data
volume and can be processed using 3D
applications.
All fault segments are ‘Re-Ribbed' in the 3D domain. ‘Re-Ribbing' is run in both x and y directions separately to account for
faults sub-parallel to either ribbing direction. ‘Re-Ribbed' fault segments and seismic
horizons are processed in ‘Surface
Tool' to calculate fault heaves and polygons.
Fault polygons are generated for all selected horizons maintaining fault plane integrity and polygon consistency among
horizons. Conventional gridding and contouring of interpreted horizons is performed incorporating fault polygons.
The method is an efficient tool that can be applied to any 2D / 2D-3D data
for quick and accurate fault mapping across
numerous horizons, without compromising fault plane integrity.