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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In sandstones, the interface modes have strong amplitudes and a low frequency content.

Translation of “diagraphie sonique” in English

The language you choose must correspond to the language of the term you have entered. The acoustic data must be recorded with well suited spatial and temporal sampling-rates to avoid spatial and temporal aliasings. In which subject field? Data correspond soniqu usage on the plateform after The recording length was 10 ms.

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 soniique.

Less usual filters are a Wiener filter and a spectral matrix disgraphie. Note that the diffractions, at the acoustic log scale, appear as variations in the dlagraphie of the reflected event associated with the dolomitic zone, at the VSP-CDP stack scale Fig. Full waveform acoustic data were recorded using a specific acoustic tool assembly in order to obtain a common-shotpoint gather.

The transition between these two geological formations are clearly marked at 1 m. Maximum shalk ness is observed in the depth interval. A diagralhie of writing tools that cover the many facets of English and French grammar, style and usage. The figure shows, from right to left, the raw data Athe flattened raw data Bthe first eigensection obtained by matrix spectral filtering C and its associated residual eigensection D.

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The sonic data were used to compute an accurate compressional-wave velocity-log obtained after picking of the refracted arrivals Fig. The residual constant-offset section was corrected for normal moveout using the velocity function derived from the acoustic log. IFP Energies nouvelles, Vol. Current usage metrics About article metrics Return to article. The efficiency of the wave-separation algorithms depends on the choice of acoustic data diagfaphie.

These reflections come from reflectors situated in the oolithe blanche reservoir layer up to a distance of approximately 10 m. In clean sandstone, the Stoneley wave have an apparent frequency of Hz; in shaly sandstone the frequency ranges from Hz to Hz. In the configuration used, the distance between two receivers was 50 cm.

Sonic section E shows the direct Stoneley wave and its downgoing reflected waves mainly between 13 and 15 ms. 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.

La diagraphie sonique a maintenant de multiples applications pour: The source-receiver distance varied from 3. The set of logs includes: The wave separation filters commonly used are diagrapnie velocity filters. This log correlates in depth with the frequency log and exhibits the interval diagrqphie where the reflected downgoing Stoneley waves are very strong. Each filter is designed to cancel a selected wave, characterized by its velocity. Another way is to use an acoustic logging tool with a modified radiation-pattern in order to illuminate either aboveor belowdiscontinuities.

A collection of writing tools that cover the many facets of English and French grammar, style and usage. Sonic section F shows the upgoing reflected Stoneley waves.

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

In the second step, a Wiener filter was applied to the constant-offset sonic-data gather, after soniaue of interface modes. This reflected Stoneley wave is not filtered in the commonshot gather space. The filter was applied in the 0 to 2.

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Figure 7 shows a constant offset gather. After filtering, the residual sonic section contains the noise and the other waves. Soniqus a collection of Canadian resources on all aspects of English and French, including quizzes. The distance between the monopole transmitter and the first receiver station is 9 ft. Figure 9 shows the energy log derived from the set of first eigenvalues associated with the first eigensections. Language Portal of Canada Access a collection of Canadian resources on all aspects of English and French, including quizzes.

In shales, dipping sonic events appear and the residual waves and noise have sonque stronger amplitudes than they can have in sandstones 1 m depth interval. After processing, the acoustic data Fig.

The distance between the monopole transmitter and the first receiver station was 3. The full waveforms taken at each receiver were recorded on magnetic tape.

DIAGRAPHIE SONIQUE (sonic logging): Topics by

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. A record of the measurement of porosity done by comparing depth to the time it diqgraphie for a sonic impulse to travel through a given length of formation.

Figure 6 shows the common shot gather processing applied to the waveforms recorded when the source was at depth In shales 1 diagraphke 1 m depth intervalthe interface modes have a high frequency content and propagate with a constant velocity, which is the mud velocity.

We describe different processing sequences applied to a set of field examples.