首页|Acoustic reflection log in transversely isotropic formations

Acoustic reflection log in transversely isotropic formations

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  • NSTL
  • Elsevier
<![CDATA[<ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0005" xml:lang="en" view="all" class="author"><ce:section-title id="st0005">Abstract</ce:section-title><ce:abstract-sec id="as0005" view="all"><ce:simple-para id="sp0055" view="all">We have calculated the waveforms of sonic reflection logging for a fluid-filled borehole located in a transversely isotropic rock. Calculations have been performed for an acoustic impulse source with the characteristic frequency of tens of kilohertz that is considerably less than the frequencies of acoustic borehole imaging tools.</ce:simple-para><ce:simple-para id="sp0060" view="all">It is assumed that the borehole axis coincides with the axis of symmetry of the transversely isotropic rock. It was shown that the reflected wave was excited most efficiently at resonant frequencies. These frequencies are close to the frequencies of oscillations of a fluid column located in an absolutely rigid hollow cylinder. We have shown that the acoustic reverberation is controlled by the acoustic impedance of the rock<ce:italic>Z</ce:italic>=<ce:italic>Vp</ce:italic><ce:inf loc="post"><ce:italic>h</ce:italic></ce:inf><ce:italic>ρ</ce:italic><ce:inf loc="post"><ce:italic>s</ce:italic></ce:inf>for fixed parameters of the borehole fluid, where<ce:italic>Vp</ce:italic><ce:inf loc="post"><ce:italic>h</ce:italic></ce:inf>is the velocity of horizontally propagating P-wave;<ce:italic>ρ</ce:italic><ce:inf loc="post"><ce:italic>s</ce:italic></ce:inf>is the rock density. The methods of waveform processing to determine the parameters characterizing the reflected wave have been discussed.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0010" class="author-highlights" xml:lang="en" view="all"><ce:section-title id="st0010">Highlights</ce:section-title><ce:abstract-sec id="as0010" view="

Sonic logAnisotropic formationsAcoustic reverberation

G. Ronquillo Jarillo、I. Markova、M. Markov

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Instituto Mexicano del Petróleo

2018

10.1016/j.jappgeo.2017.11.005

Journal of Applied Geophysics

Journal of Applied Geophysics

EISCI
ISSN：0926-9851
年,卷(期)：2018.148
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