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- W138675087 abstract "In the late 1960s and early 1970s there were severe constraints on how a marine three-dimensional (3-D) seismic reflection survey could be designed. Streamer location techniques were almost nonexistent, and seismic data-processing procedures were developed only for two-dimensional (2-D) surveys. For these reasons and others, 3-D surveys were designed as a collection of parallel 2-D seismic lines. Geologic considerations had a minimal impact because 3-D surveys were designed with the concept of dip direction and strike direction. As survey sizes grew, this simple geologic picture broke down. Modern 3-D data processing systems and modern acquisition technology place fewer constraints on the design of 3-D surveys. They should exploit this new freedom where geology and straight lines are not compatible or where costs can be significantly reduced. Successful marine 3-D surveys have been shot using parallel 2-D lines, crossed grids of parallel 2-D lines, collections of randomly oriented 2-D lines, and as a series of overlapping circular shot lines. A 3-D seismic survey was recently conducted over a salt dome by shooting a continuous series of concentric circles. All 3-D methods seem to have both advantages and shortcomings. The more they learn about and use different techniques, the more they realizemore » that their first ideas, such as considering a 3-D survey as a collection of parallel 2-D lines, may not necessarily be the best ideas.« less" @default.
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- W138675087 date "1988-03-01" @default.
- W138675087 modified "2023-09-23" @default.
- W138675087 title "New directions for marine three-dimensional surveys" @default.
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