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 which subject field? Glossaries and vocabularies Access Translation Bureau glossaries and vocabularies. Maximum shalk ness is observed in the depth interval.

This reflected Stoneley wave is not filtered in the commonshot gather space. Current usage metrics About article metrics Return to article. In the common-shot dizgraphie, the refracted arrivals and borehole modes have linear moveout across the offset range, while the reflected events have hyperbolic moveout.

A method that measures the time required for sound impulses to travel through a given length of rock. The sonic section shown in Figure 10 has been filtered in order to separate the direct Stoneley wave and downgoing reflected Stoneley waves.

The fule waveforms recorded by an array diagrahpie 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. IFP Energies nouvelles, Vol. The recording length was 10 ms. The acoustic data must be recorded with well suited spatial and temporal sampling-rates to avoid spatial and temporal aliasings. They are Stoneley waves. In this field case, wave separation was performed in two steps.

Change the order of display of the official languages of Canada English first French first Option to display the non-official languages Spanish or Portuguese Neither Spanish Diatraphie Display definitions, contexts, etc. Usually measured in microseconds per foot. 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.

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Volume 47, Number 2March-April 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. In the part of the well studied, the reservoir layers are clean sandstones or shaly sandstones overlain by impervious shale cap rock. Metrics Show article metrics.

For each gather Fig. In the second step, a Wiener filter was applied to the constant-offset sonic-data gather, after elimination of interface modes. 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 diaggraphie as the frequency log and its standard deviation.

Translation of “diagraphie sonique” in English

The well is completed by a casing down to the top of the reservoir layers. Each wave contains information that can be disturbed by the presence of the aonique waves.

Figure 9 shows the energy log derived from the set of first eigenvalues associated with the first eigensections. A collection of writing tools that cover the many facets of English and French grammar, style and usage. The results are shown in Figs.

Access a collection of Canadian resources on all aspects of English and French, including quizzes. 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 receiver spacing was 1 cm. Each filter is designed to cancel a selected wave, characterized by its velocity.

The figure shows, from right to left, the raw data Viagraphiethe flattened raw data Bthe first eigensection obtained by matrix spectral filtering C and its associated residual eigensection D.

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. The wave separation filters commonly used are apparent velocity filters.

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DIAGRAPHIE SONIQUE (sonic logging): Topics by

The source was fired at equal spacings of 5 cm throughout the open hole section of the well. The set of logs includes: Writing tools A collection of writing tools that cover the many facets of English and French grammar, style and usage. Language Portal of Canada Access a collection of Canadian resources on all aspects of English and French, including quizzes.

After filtering, the residual sonic section shows the refracted modes and the leaky modes Fig. The sonic tool used was a Schlumberger Dipole Imaging tool.

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

The source-receiver distance varied from 3. The residual constant-offset section was corrected for normal moveout using the velocity function derived wonique the acoustic log. In the configuration used, the distance between two receivers was 50 cm. In the first step, a Wiener filter was applied in the 2-to-5 ms time-interval.

The efficiency of the wave-separation algorithms depends on the choice of acoustic data gathers.

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

It was used to enhance the interface modes Fig. Less usual filters are a Wiener filter daigraphie a spectral matrix filter. For that purpose, the sonic data were collected in constant offset gathers.

In sandstones, the interface modes have strong amplitudes and a low frequency content. The filter was applied in the 0 to 2.