Patent ID: 6771800
Filing Date: 2004-08-03
Classification: G01V

Abstract:
Method of chrono-stratigraphic interpretation of a seismic image section S which comprises a horizontal dimension or width and a vertical dimension or height in the direction of the subsoil and which consists of columns of pixels, consisting in:defining a matrix M identical in size to the image section S and consisting of elements each of which is associated with a pixel of the image section S and is initially assigned a zero value, for each pixel i of the image section S, calculating a continuity curve Ci passing through the said pixel and transverse to the vertical dimension of the image section S, incrementing an element of the matrix M by one unit each time the pixel with which it is associated in the image section S is crossed by a curve Ci, and characterized in that it furthermore consists in: constructing, for each column c of the matrix M, a histogram Hc consisting of a number of classes which is equal to the number of elements of the said column c, each class corresponding to one of the elements of the column c and containing a number of samples which is equal to the value aggregated in the relevant element of the matrix M, which value is equal to the number of curves passing through the pixel associated with the said element, the total number of samples distributed in the histogram constructed for each column being equal to the total number of pixels in the image section S, equalizing each histogram Hc so as to produce an equalized histogram Hcâ€², defining an empty image section Sâ€², whose width in pixels is identical to the width in pixels of the image section S and whose height in pixels is equal to the number of classes of the histograms Hcâ€², assigning the distribution defined by the equalized histogram Hcâ€² to each column câ€² of the image section Sâ€² by allocating each pixel of the column câ€² the cardinality of the content of the associated class of Hcâ€², delimiting in the image section Sâ€² the groups of contiguous pixels containing samples and labelling each of the said groups, allocating each pixel of the image section S the label given to the pixel group to which it was assigned in the image section Sâ€² and displaying the labelled image section S.