Three Dimensional Stacked Horizons Map
Orthographic view of stacked three-dimensional models. Each surface (or "horizon") represents the top of a layer of petroleum-bearing sandstone (often just called a "sand"). For visibility, the vertical relief of each surface is amplified by a factor of ten, and vertical distance between surfaces is stretched by 10,000'.
The area mapped is characterized by narrow bands of laminated sedimentary deposits. The overburden accumulates for millions of years until the weight eventually causes a sudden catastrophic slope failure. These slope failures form a fractal pattern of myriad down-to-the-coast "faults" (resembling subsurface cliff faces). Under certain conditions, oil and gas can be trapped by these faults.
Copyright © 1995 SOMCO Corp.
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