Earth Decision Sciences

Paradigm France

Fabien Bosquet

Jean-Claude Dulac

Emmanuel Labrunye

The invention concerns a method for extracting a geological horizon and related properties of a seismic representation, comprising a step () which consists in digital modeling with continuous local seismic traces, calculating the optimal offset and defining a conditional neighbourhood of a reference central continuous local seismic trace; a step () which consists in defining a two-dimensional matrix whereof the line and column indices correspond to the coordinates of the geophones; a third step () which consists in selecting a seed point; a fourth step () which consists in determining the point vertically closest to the seed point and a fifth step () which consists in assigning to the point P(p,q,t) the value P(p,q,t+hij,pq,k), where hij,pq,k is optimal offset of the neighbouring point P(i,j,k), so as to estimate the related properties of the conditional neighbourhood thereby filling the two-dimensional extraction matrix of step ().

Device and software package for extracting a geological horizon and related properties

The invention concerns a method for smoothing a subsurface property in a geological structure represented by seismic measurements comprising a step () which consists in digital modelling by continuous local seismic traces, calculating an optimal offset and defining a conditional neighbourhood of a reference central continuous local seismic trace; a step () which consists in selecting the property to be smoothed on a conditional neighbourhood; a third step () which consists in substituting properties of the conditional neighbourhood with offset properties; and a fourth step () which consists in selecting an average of the properties offset on the conditional neighbourhood at step ().

Method, device and software package for smoothing a subsurface property

A method for locally determining a profile of geological horizons includes a step () which consists in digital modeling with continuous local seismic traces, calculating an optimal offset and defining a conditional neighborhood of a reference central continuous local seismic trace; a step () which consists in defining residuals relative to the reference central continuous local seismic trace; a third step () which consists in minimizing the set of residuals on the conditional neighborhood and a fourth step () which consists in determining parametric coefficients corresponding to the minimization of the set of residuals on the conditional neighborhood carried out at step ().

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Nancy, France

Fabien Bosquet