Global classification of sonic logs

G - Physics – 01 – V

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G01V 1/48 (2006.01)

Patent

CA 2464429

A method of determining the sonic slowness of a formation traversed by a borehole comprising generating tracks from sonic waveform peaks received at a plurality of depths wherein the peaks that are not classified prior to tracking is set forth. A method for generating a slowness versus depth log is generated for waveform arrivals by classifying long tracks, classifying small tracks; classifying tracks that overlap; filling in gaps; and creating a final log is disclosed. In further improvements, non-classified tracks and interpolation are used to fill in gaps.

Procédé permettant de déterminer la lenteur sonique d'une formation traversée par un trou de forage, qui consiste à produire des tracés à partir de pics de formes d'ondes reçus correspondants à une pluralité de profondeurs, les pics n'étant pas classifiés avant l'établissement du tracé. La présente invention concerne également un procédé permettant de produire un diagraphe de lenteur par rapport à la profondeur pour des arrivées de formes d'ondes par classification de tracés longs, classification de tracés courts, classification de tracés chevauchants, comblement des lacunes et création d'un diagraphe final. Dans d'autres modes de réalisation améliorés, des tracés non classifiés et l'interpolation sont utilisés pour combler les lacunes.

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