Acoustic logging anisotropic scale device and method

An anisotropic and scaled technology, which is applied in seismology and seismic signal processing for logging records, can solve the problems that the anisotropy size cannot be adjusted manually, is easy to break, and is difficult to form.

Active Publication Date: 2018-12-18
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

Although mudstone is a natural anisotropic medium, it is easy to break, and the anisotropy cannot be adjusted artificially, so it is difficult to form intervals with different anisotropy

Method used

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  • Acoustic logging anisotropic scale device and method
  • Acoustic logging anisotropic scale device and method
  • Acoustic logging anisotropic scale device and method

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Embodiment Construction

[0022] In order to express the technical solutions and advantages of the embodiments of the present invention more clearly, the technical solutions of the present invention will be further described in detail below with reference to the drawings and embodiments.

[0023] Figure 1A and Figure 1B XY coordinate cross section and XZ coordinate cross section diagram of the scale device provided by the embodiment of the present invention. Such as Figure 1A and Figure 1B As shown, the present invention provides a kind of scale device, what the scale device in the embodiment of the present invention adopts is four kinds of materials with two different longitudinal and transverse wave propagation velocities, wherein four pieces of materials are cuboids with a square on one side, and then The four cuboids are placed at intervals and glued firmly, and the materials adjacent to each other are different. In the center of the patched scale device, a well hole is drilled for placing lo...

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Abstract

The present invention relates to an acoustic logging anisotropic scale device and method. The device comprises a scale device and a logging instrument, wherein the scale device is composed of four materials of two types having different longitudinal and transverse wave propagation speeds, each two of the four materials of two types are firmly stuck and placed at intervals and the adjacent materials are different from each other; a well hole is formed at the center of the scale device, and the logging instrument is placed in the well hole of the scale device; each time for the logging instrument to rotate in the well hole of the scale device, an orthogonal dipole source emits an acoustic wave, which is transmitted to an orthogonal dipole receiver after passing through the scale device, one-time orthogonal dipole acoustic wave measurement is carried out, a group of four-component waveform is obtained and the azimuthal angle for the rotation of the logging instrument is recorded; then, the azimuthal angle and anisotropy of the fast and slow shear waves are obtained through a cross dipole logging anisotropic inversion method. According to the acoustic logging anisotropic scale device and method in the invention, a simple and feasible equivalent anisotropic model well setting and construction method is realized through a special design of the scale device, and the performance of thelogging instrument and the scale instrument can be verified.

Description

technical field [0001] The invention relates to the fields of petroleum geophysical exploration and acoustic logging, in particular to an anisotropic calibration device and method for acoustic logging. Background technique [0002] With the continuous deepening of my country's oil and gas exploration and development, all oilfields are carrying out research on the exploration and development of complex oil and gas reservoirs. In the field of geophysical logging, the formation properties to be measured are becoming more and more complex, and the requirements for instrument performance are getting higher and higher. test. The measurement of formation anisotropy has always been a difficult point in geophysical exploration research. The orthogonal dipole acoustic logging method can be used to invert the lateral The magnitude and orientation of anisotropy in vertical wells in isotropic (HTI) formations or horizontal wells in VTI formations, and this information is of great signifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/50G01V1/36
CPCG01V1/36G01V1/50
Inventor 陈浩李超宋云红何晓王颖王秀明
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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