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## Simplified notion of 3-D LOMOPLAN

In experimenting with 3-D LOMOPLAN, I came upon a conceptual oversimplification, which although it is not precisely correct, gives a suitable feeling of the meaning of the operator. Imagine the earth was flat horizontal layers, except for occasional faults. Then, to find the faults you might invoke the horizontal gradient of the 3-D continuum of data. The horizontal components of gradient vanish except at a fault, where their relative magnitudes tell you the orientation of the fault. Instead of using the gradient vector, you could use prediction-error filters of first order (two components) along x and y directions. 3-D LOMOPLAN is like this, but the flat horizontal bedding may be dipping or curved. No output is produced (ideally) except at faults. The 3-D LOMOPLAN is like the gradient along the plane of the bedding. It is nonzero where the bedding has an intrinsic change.

 LOMOPLAN flags the bedding where there is an intrinsic change.

Next: LOMOPLAN DEFINITION IN 2-D Up: INTRODUCTION Previous: INTRODUCTION
Stanford Exploration Project
11/17/1997