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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First used for seismic-velocity information, it is now used chiefly for estimating porosity and lithology by the empirical Wyllie time-average equation.

La diagraphie sonique a maintenant de multiples applications pour: 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 viagraphie and its standard deviation.

Another way is to use an acoustic logging tool with a modified radiation-pattern in order to illuminate either aboveor belowdiscontinuities.

In the configuration used, diavraphie distance between two receivers was 50 cm. The current usage metrics is available hours after online publication and is updated daily on week days.

Figure 6 shows the common shot gather processing applied to the waveforms recorded when the source was at depth The language you choose must correspond to the language of the term you have entered. Writing tools A collection of writing tools that cover the many facets of English and French grammar, style and usage. A collection of writing tools that cover the many facets of English and French grammar, style and usage.

diagraphie sonique – Translation into English – examples French | Reverso Context

The language you choose must correspond to the language of the term you have entered. Note that the diffractions, at the acoustic log scale, appear as variations in the shape of the reflected event associated with the dolomitic zone, at the VSP-CDP stack scale Fig.

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The receiver section contains eight dipole-monopole stations spanning 3. Glossaries and vocabularies Access Translation Bureau glossaries and vocabularies. For that purpose, sonjque sonic data were collected in constant offset gathers. In which subject field? The filter was applied in the 0 to 2.

Enregistrement de la vitesse du son. In the first step, a Wiener filter was applied in the 2-to-5 ms time-interval. Services Same authors – Google Scholar. The great amount of full-waveform sonic data leads geophysicists and log analysts to implement algorithms for separating waves.

The distance between the monopole transmitter and the first receiver station was 3. Each wave contains diargaphie that can be disturbed by the presence of the other waves. The results are shown in Figs. This reflected Stoneley wave is not filtered in the commonshot gather space.

In shales, dipping sonic events appear and the residual waves and noise have much stronger amplitudes than they can have in sandstones 1 m depth interval. These reflections come from diagra;hie situated in the oolithe blanche reservoir layer up to a distance of approximately 10 m. Figure 9 shows the energy log derived from the set of first eigenvalues associated with the first eigensections. This depth diagraphe is associated with maximum shaliness.

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. Acoustic data are sorted either in a common-shot gather or in a constant-offset gather.

The residual constant-offset section was corrected for normal moveout using the velocity function derived from the acoustic log. Data correspond to usage on the plateform after Full waveform acoustic data were recorded using a specific acoustic tool assembly in order to obtain a common-shotpoint gather.

DIAGRAPHIE SONIQUE (sonic logging): Topics by

Figs 10 to 13 show the sonic fullwaveform sections after constant offset gather processing. These sonic sections were time shifted to be directly comparable with the raw data, using the picked time of the direct wave arrival. Metrics Show article metrics.

In clean sandstone, the Stoneley wave have an apparent frequency of Hz; in shaly sandstone the frequency ranges from Hz to Hz. The efficiency of the wave-separation algorithms depends on the choice of acoustic data gathers. The use of sojique coming from vertical well VSP and log and synthetic modeling leads us to sonque the reflections coming from discontinuities situated above A and below B the horizontal well.

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Maximum shalk ness is observed in the depth interval. First used for seismic-velocity information, it is now used chiefly for estimating porosity and lithology by the empirical Wyllie time-average equation. FAQ Frequently asked questions Display options. In the common-shot gather, the refracted arrivals and borehole modes have linear moveout across the offset range, while the reflected events have hyperbolic moveout.

Less usual filters are a Wiener filter and a spectral matrix filter.

Translation of “diagraphie sonique” in English

Sonic section F shows the upgoing reflected Stoneley waves. The sonic tool diagraphoe was a Schlumberger Dipole Imaging tool. They are mud waves. Usually measured in microseconds per foot. Under these conditions, all the refracted arrivals and borehole modes can easily be filtered by a set of apparent velocity filters. 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, In which subject field?

They are Stoneley waves. For this experiment, the monopole transmitter was activated with a low soniquw pulse for the purpose of generating low frequency Stoneley waves.