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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The transition between these two geological formations are clearly marked at 1 m. At about 1 m, diffractions can be observed on the diagfaphie sonic section Fig.

The sonic data were used to compute an accurate compressional-wave velocity-log obtained after picking of the refracted arrivals Fig. Data correspond to usage on the plateform after After processing, the acoustic data Fig.

Translation of “diagraphie sonique” in English

The efficiency of an apparent velocity filter is enhanced by application of spectrum equalization. On this section we can observe good correlation between the frequency log and lithology derived from an independent analysis. Services Same authors – Google Scholar. First used for seismic-velocity information, it is now used chiefly for estimating porosity and lithology by the empirical Wyllie time-average equation. Sonic section E shows the direct Stoneley wave and its downgoing reflected waves mainly between 13 and 15 ms.

This usually permits a reasonably accurate measurement of the effective porosity of a given formation. Figure 8 shows from top to bottom the slowness and the standard deviation of the slowness computed from raw sonic data and filtered sonic data first eigensection as well as the frequency log and its standard deviation.

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A collection of writing tools that cover the many facets of English and French grammar, style and usage. The efficiency of the wave-separation algorithms depends on the choice of acoustic data gathers.

The borehole Stoneley waves are trapped modes that can be reflected when the direct borehole Stoneley wave encounters permeable fractures Hornby, Johnson, Winkler and Plumb, or a major change in lithology Hornby, A 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.

Glossaries and vocabularies Access Translation Bureau glossaries and vocabularies. In which subject field?

In this field case, wave separation was performed in two steps. For each gather Fig.

The source was fired at equal spacings of 6 snique throughout the open hole section. The use of information coming from vertical well VSP and log and synthetic modeling leads us to differentiate the reflections coming from discontinuities situated above A and below B the horizontal well. This log correlates in depth with the frequency log and exhibits the interval depth where the reflected downgoing Stoneley waves are very strong.

Sonic section F shows the upgoing reflected Stoneley waves. The value of the Stoneley frequency is directly related to shaliness.

The great amount of full-waveform sonic data leads geophysicists and log analysts to implement algorithms for separating waves. La diagraphie sonique a maintenant de multiples applications pour: First used for seismic-velocity information, it is now used chiefly for estimating porosity and lithology by the empirical Wyllie time-average equation.

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Figs 10 to 13 show the sonic fullwaveform sections after constant offset gather processing. The vertical well was drilled to establish a vertical geologic cross-section of the quarry and to identify the acoustic impedance variation boundaries.

DIAGRAPHIE SONIQUE (sonic logging): Topics by

In which subject field? Each filter was applied in a sonque in order to select a specific wave. In the second step, a Wiener filter was applied to the constant-offset sonic-data gather, after elimination of interface modes. Usually measured in microseconds per foot.

Enregistrement de la vitesse du son. After filtering, the residual sonic section contains the noise and the other waves. A 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.

The record resulting from this process is called “acoustic log.

The distance between the soniqud transmitter and the first receiver station is 9 ft. The source was fired at equal spacings of 5 cm throughout the open hole section of the well. Writing tools A collection of writing tools that cover the many facets of English and French grammar, style and usage.

Usually measured in microseconds per foot. The distance between the monopole transmitter and the first receiver station was 3.