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A simple method for estimating excess pressure over horsts from seismic sections

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Abstract:

Observations in the North Sea Basin max indicate significant overpressure in sediments over horst blocks but not over grabens at the same submudline depth. The purpose is to show that over a horst, of top width W, with grabens on either side of top widths G₁ and G₂, respectively, the equivalent mud density. rgr

_r can be estimated approximately from the simple equation.

$\rho _e = 1 + \frac{5}{4} \times \frac{{(G_1 + G_2 )}}{{2W + (G_1 + G_2 )]}}$

Keywords:	geophysics horsts and grabens overpressure North Sea
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