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Petrophysical parameter calculation method and system based on seismic wave simulation

A petrophysical and parameter calculation technology, applied in geophysical measurement, seismic signal processing, seismology, etc., can solve the problems of scale, computing power, and difficulty and limitation in obtaining large-scale fine geological models that do not reach the wavelength of seismic waves

Inactive Publication Date: 2019-04-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

In theory, it is feasible to apply numerical simulation methods to obtain petrophysical parameters for larger-scale cores, but the computational power and difficulty in obtaining large-scale fine geological models limit the application in this area
Existing works (Deeks et al., 2012; Dvorkin et al., 2012) are mainly carried out for completely random models, and due to the limitation of computer capabilities, they have not yet reached the scale of seismic wave wavelength

Method used

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  • Petrophysical parameter calculation method and system based on seismic wave simulation
  • Petrophysical parameter calculation method and system based on seismic wave simulation
  • Petrophysical parameter calculation method and system based on seismic wave simulation

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Embodiment Construction

[0036] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0037] figure 1 A flow chart showing the steps of the method for calculating petrophysical parameters based on seismic wave simulation according to the present invention.

[0038] In this embodiment, the method for calculating petrophysical parameters based on seismic wave simulation according to the present invention may include:

[0039] Step 101, establishing an initial large-scale reservoir model based on core data, and then obtaining a large-scale reservoir model based on fractu...

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Abstract

The invention discloses a petrophysical parameter calculation method and system based on seismic wave simulation. The method can comprise the steps of: establishing an initial large-scale reservoir model according to core data, and thus, obtaining a large-scale reservoir model based on crack data and porosity data; establishing a small-scale grid based on the large-scale reservoir model, so that an equivalent elastic parameter model is obtained; and obtaining anisotropic parameters of a reservoir based on the equivalent elastic parameter model. According to the petrophysical parameter calculation method and system based on seismic wave simulation disclosed by the invention, petrophysical elastic parameters of a complex reservoir are obtained through a numerical value calculation method; the difficulty of obtaining cores different in geological characteristics can be avoided; and thus, small-scale non-uniform caused macroscopic physical parameter change is obtained.

Description

technical field [0001] The invention relates to the technical field of petrophysical modeling in oil and gas exploration, and more specifically, to a method and system for calculating petrophysical parameters based on seismic wave simulation. Background technique [0002] Petrophysical studies are a key means of communicating petroleum geological parameters and seismic responses. The velocity, density, Poisson's ratio, and anisotropy parameters of the underground medium are obtained from reflection seismic data, and then the porosity, fracture development and direction, and fluid (or gas) conditions of the pores and fractures are obtained from these parameters. Realize the direct identification of reservoirs by reflection seismic data, and realize the goal of lithology exploration. Traditional rock physics research is mainly carried out in two ways: experimental measurement and equivalent medium theory. The experimental method is to measure the characteristics of rock phys...

Claims

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624G01V2210/6242G01V2210/6244G01V2210/66
Inventor 霍志周刘喜武刘宇巍刘志远
Owner CHINA PETROLEUM & CHEM CORP
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