DIAGRAPHIE SONIQUE PDF

Translations in context of “diagraphie sonique” in French-English from Reverso Context: L’invention concerne la diagraphie sonique en cours de forage. Le procédé consiste à mesurer, par un outil de diagraphie acoustique, des données acoustiques associées à une formation à l’intérieur d’un trou de forage, . Institut Français du Pétrole. Résumé. L’utilisation d’outils acoustiques à émetteurs -récepteurs multiples et enregistrement numérique permet de faire une.

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On this section we can observe good correlation between the frequency log and lithology derived from an independent analysis. First used for seismic-velocity information, it is now used chiefly for estimating porosity and lithology by the empirical Wyllie time-average equation.

Sonic diagrpahie F shows the upgoing reflected Stoneley waves. The sonic tool used was a Schlumberger Dipole Imaging tool. Full waveform acoustic data were recorded using a specific acoustic tool assembly in order to obtain a common-shotpoint soniqu. Language Portal of Canada Access a collection of Canadian resources on all aspects of English and French, including quizzes.

After processing, the acoustic data Fig. The receiver section contains eight dipole-monopole stations spanning 3. We describe different processing sequences applied to a set of field examples. Data correspond to usage on the plateform after Soniquw record of the measurement of porosity done by comparing depth to the time it takes for a sonic impulse to travel through a given length of formation. A collection of writing tools that cover the many facets of English and Diagrapnie grammar, style and usage.

In shales 1 – 1 m depth intervalthe interface modes have a high frequency content and propagate with a constant velocity, which is the mud velocity.

Less usual filters are a Wiener filter and a spectral matrix filter. La diagraphie sonique a maintenant de multiples applications pour: Acoustic data are sorted either in a common-shot gather or in a constant-offset gather.

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Translation of “diagraphie sonique” in English

In shales, dipping sonic events appear and the residual waves and noise have much stronger soniqie than they can have in sandstones 1 m depth interval. The acoustic data must be recorded with well suited spatial and temporal sampling-rates to avoid spatial and temporal aliasings. Each wave contains information that can be disturbed by the presence of the other waves.

Enregistrement de la vitesse du son. Current usage metrics About article metrics Return to article. The wave separation filters commonly used are apparent velocity filters. The sonic section shown in Figure 10 has been filtered in order to separate the direct Stoneley wave and downgoing reflected Stoneley waves. The vertical well was drilled to establish a vertical geologic cross-section of the quarry and to identify the acoustic impedance variation boundaries. They are Stoneley waves.

In sandstones, we can notice a residue of Stoneley modes at about 2.

Figure 9 shows the energy log derived from the set of first eigenvalues associated with the first eigensections. In the second step, a Wiener filter was applied to the constant-offset sonic-data gather, after elimination of interface modes. The maximum standard deviation observed at m is due to the interference of downgoing reflected waves and a direct Stoneley wave. The interface modes are very different in, sandstones and in shales. Change the order of display diagrzphie the official languages of Canada English first French first Option to display the non-official languages Spanish or Portuguese Neither Spanish Portuguese Display definitions, contexts, etc.

Sonic section E shows the direct Stoneley wave and its downgoing reflected waves mainly between 13 and 15 ms. Figure 7 shows a constant offset gather. Writing tools A collection of writing tools that cover the many facets of English and French grammar, style and usage.

Access a collection of Canadian resources on all aspects of English and French, including quizzes. Each filter was applied in a time-window in order to select a specific wave. The receiver spacing diiagraphie 1 cm.

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DIAGRAPHIE SONIQUE (sonic logging): Topics by

The residual constant-offset section was corrected for normal moveout using the velocity function derived from the acoustic log. Glossaries and vocabularies Access Translation Bureau glossaries and viagraphie. In which subject field?

The fule waveforms recorded by an array of receivers in a borehole sonic tool contain a set of waves that can be fruitfully used to obtain detailed information about the nearborehole lithology and structure.

The signal to noise ratio is enhanced by spectral matrix filtering. The efficiency of the wave-separation algorithms depends on the choice of acoustic data gathers. This usually permits a reasonably accurate measurement of the effective porosity of a given formation. This reflected Stoneley wave is not filtered in the commonshot gather space. The language you choose must correspond to the language of the term you have entered. The efficiency of an apparent velocity filter is enhanced by application of spectrum equalization.

The results are shown in Figs. After filtering, the residual diagraohie section shows the refracted modes and the leaky modes Fig. Enregistrement de la vitesse du son. First used for seismic-velocity information, it is now used chiefly for estimating porosity and lithology by the empirical Wyllie time-average equation.

Writing tools A collection of writing tools that cover the many facets of English and French grammar, style and usage. The processing included spectrum equalization in the kHz frequency bandwidth Fig. The language you choose must correspond to the language of the term you have entered.

Volume 47, Number 2March-April A record of the measurement of porosity done by comparing depth diagrapphie the time it takes for a sonic impulse to travel through a given length of formation.