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Ray elastic parameter inversion method

A technology of elastic parameters and ray elastic impedance, which is applied in seismology for logging records, etc., can solve the problems of unstable parameters, discontinuous lithological profile events, and inability to be widely used, so as to achieve reliable results and improve stability Effects on Sex and Accuracy

Active Publication Date: 2010-12-08
北京诺克斯达石油科技有限公司
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Problems solved by technology

[0023] The purpose of the present invention is to provide a ray elastic parameter inversion method to solve the instability of the parameters obtained by the elastic impedance inversion method in the prior art, and the obtained lithology section event is very discontinuous, which cannot be widely used in actual production. application problem

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Embodiment Construction

[0040] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0041] Combine below figure 1 The ray elastic parameter inversion method according to the present invention will be described in detail. Such as figure 1 As shown, the ray elastic parameter inversion method includes:

[0042] Step S11, obtaining well logging data.

[0043] Specifically, the existing conventional acoustic wave and density logging are used to obtain the acoustic wave and logging density data; and the shear wave records in the logging data can be obtained by using the full wave train logging, and can also be determined by the inversion of the known petrophysical relationship .

[0044] Step S12, determining the ray elastic impedance REI.

[0045] Specifically, the ray elasti...

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Abstract

The invention provides a ray elastic parameter inversion method which comprises the following steps of: acquiring logging information of a logging record, and determining the ray elastic impedance REI according to the logging information; arousing and recording seismic waves, carrying out amplitude holding treatment on recorded seismic information, and forming first angle superposition data and second angle superposition data; respectively carrying out ray elastic impedance inversion on the first angle superposition data and the second angle superposition data by taking the ray elastic impedance REI as a low frequency constraint to obtain a first ray invertomer and a second ray invertomer; calculating the longitudinal-transversal wave velocity ratio, the longitudinal wave impedance and the transversal wave impedance; and analyzing the seismic attribute which is closely related to the reservoir lithology change and pore fluid components by utilizing the longitudinal-transversal wave velocity ratio, the longitudinal wave impedance and the transversal wave impedance. The invention can obtain more reliable longitudinal-transversal wave velocity ratio by calculating the longitudinal-transversal wave velocity ratio according to the first ray invertomer and the second ray invertomer.

Description

technical field [0001] The invention relates to the field of seismic exploration or detection, in particular to a ray elastic parameter inversion method. Background technique [0002] Seismic exploration is to artificially stimulate seismic waves, record the propagation behavior of seismic waves in a certain way on the surface, and study their propagation laws in the stratum to find out the geological structure and lithological characteristics of the underground, and then find geophysical detection methods for oil and gas fields . [0003] Seismic inversion is the process of imaging (solving) the spatial structure and physical properties of underground strata by using seismic data from surface observations and constrained by known address patterns and drilling and logging data. [0004] The traditional post-stack wave impedance inversion can obtain the wave impedance profile, which has a good effect in reservoir prediction. However, in recent years, with the continuous imp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/40
Inventor 刘力辉
Owner 北京诺克斯达石油科技有限公司
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