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A method and system for identifying heterogeneous anisotropy of rock around a well

An anisotropic, well-round rock technology, applied in the field of oil and gas and mineral resources exploration, which can solve the problem of less research on identification methods

Active Publication Date: 2020-02-07
YANGTZE UNIVERSITY
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Problems solved by technology

At present, there are few researches on the identification methods of the heterogeneous anisotropy of the rock far away from the borehole wall

Method used

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  • A method and system for identifying heterogeneous anisotropy of rock around a well
  • A method and system for identifying heterogeneous anisotropy of rock around a well
  • A method and system for identifying heterogeneous anisotropy of rock around a well

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Embodiment Construction

[0047] The present invention will be described in further detail below in conjunction with the accompanying drawings. The present invention provides a method for identifying the heterogeneous anisotropy of rocks around a well, and the method includes the following steps, such as figure 1Shown:

[0048] S1. Perform array acoustic logging in the depth interval, and obtain orthogonal dipole four-component array acoustic logging waveform data in the depth interval;

[0049] The orthogonal dipole four-component array acoustic logging data is the data collected by the dipole mode of the multipole logging tool, and the orthogonal dipole is two sets of transducers X and Y perpendicular to each other, and X1 and Y1 The corresponding reception X2 and Y2 of the transmission, the collected data are four sets of data: X1 transmission X2 reception, X1 transmission Y2 reception, Y1 transmission X2 reception, Y1 transmission Y2 reception.

[0050] S2. Obtain the orthogonal dipole four-compon...

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Abstract

The invention provides a method and a system for identifying non-uniform anisotropy of the peripheral rock. The method is characterized in that the sound wave logging is carried out in a depth interval, and the orthogonal dipole four-component display waveform data in the depth interval is obtained; the scattering attenuation quality factors of the sound wave signals are used for identifying the uniform anisotropy of the rock, and the result of the non-uniform anisotropy of the rock can be used for guiding oil gas development, and important information is provided for exploration, mining and production of oil gas.

Description

technical field [0001] The invention relates to the technical field of oil and gas and mineral resource exploration, in particular to a method and system for identifying non-uniform anisotropy of rocks around wells. Background technique [0002] Inhomogeneity is common in subsurface rocks. Due to the inhomogeneity of the composition, density, phase state of rocks in the lithosphere, and the composition, temperature, and pressure of fluids in fractures and caves, the actual elastic parameters of formation media, such as elastic modulus, velocity, and Poisson's ratio, are often spatially distributed. is non-uniform. Anisotropy identification of rock inhomogeneity is crucial for fine exploration of oil, gas and mineral resources. [0003] The heterogeneous anisotropy of rock at the logging scale can be identified by time difference in different azimuths, tomography and other methods. These methods mainly use the direct wave information in the acoustic logging data, and can on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/48E21B49/00
CPCE21B49/00G01V1/48
Inventor 黑创唐晓明苏远大庄春喜罗明璋李修权张磊陈伟国
Owner YANGTZE UNIVERSITY
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