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Shale anisotropic rock physical modeling method

A petrophysical modeling and anisotropic technology, applied in seismic signal processing, electrical digital data processing, special data processing applications, etc., can solve problems such as difficult application of petrophysical models, small scale, and complexity

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Compared with conventional reservoirs, the microstructure of shale is more complicated, its pores and grains are smaller, and its mineral components are more diverse. Moreover, due to the directional arrangement of clay in the rock framework structure and the existence of interlayer fractures, shale reservoirs With strong anisotropy, it can be seen that the conventional petrophysical model is difficult to apply

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  • Shale anisotropic rock physical modeling method
  • Shale anisotropic rock physical modeling method
  • Shale anisotropic rock physical modeling method

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Embodiment Construction

[0056] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0057] The present invention relates to Voigt-Reuss-Hill averaging, anisotropic self-consistent model (SCA), anisotropic differential equivalent medium model (DEM) and Backus averaging.

[0058] The invention constructs a shale anisotropic petrophysical model. By applying the Voigt-Reuss-Hill average and anisotropic self-consistent model (SCA) and differential equivalent medium model (DEM), the mineral components (kerogen, quartz, calcite) and oriented clay-fluid composites are calculated respectively. Effective elastic properties, combined with Backus average clay-fluid composites, interlaminar seams and mineral components.

[0059] Such as figure 1 Shown, the present invention comprises the following steps:

[0060] (1) Using the Voigt-Reuss-Hill average to calculate the elastic modulus of the mixed minerals:

[0061] K m ...

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Abstract

The invention provides a shale anisotropic rock physical modeling method, and belongs to the field of rock physical study. The method comprises the following steps of: (1) calculating the elasticity modulus of mixed mineral; (2) combining an anisotropic self-consistent model and an anisotropic differential effective medium model for calculating the effective elasticity modulus of clay and fluid compounds; and (3) mixing the clay and fluid compounds, seams between layers and mineral components; calculating the effective elastic parameters of saturated rocks; solving the longitudinal wave velocity and the transverse wave velocity of equivalent anisotropic media; and completing the modeling. The method has the advantages that the shale anisotropic rock physical modeling method can be applied to shale longitudinal and transverse wave velocity prediction; the calculation precision is superior to that of an isotropous effective medium model, and the elasticity features of the rocks are more accurately described.

Description

technical field [0001] The invention belongs to the field of rock physics research, in particular to a shale anisotropic rock physics modeling method. Background technique [0002] Geophysical methods play an important technical support role in the exploration and development of shale gas, and have unique advantages in studying the complex characteristics of reservoirs. Petrophysical techniques are the foundation of geophysical research. Rock physics modeling and rock physics analysis are two important aspects of rock physics research. Rock physics modeling is an equivalent model proposed to simulate the elastic properties of the medium, while rock physics analysis is based on a suitable rock physics model. , to analyze the influence of rock microstructure on macroscopic response characteristics. In the field of geophysics, the development of seismic rock physics has been paid more and more attention. [0003] The study of rock physical properties usually simplifies rocks...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G01V1/30
Inventor 李呈呈马中高刘卫华周枫张克非周中彪
Owner CHINA PETROLEUM & CHEM CORP
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