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Gas containing sandstone reservoir seismic responding value simulating method based on rock physical model

A petrophysical model, numerical simulation technology, applied in seismology, geophysical measurement, seismic signal processing, etc., can solve problems such as stay, subjectivity inaccuracy, etc.

Active Publication Date: 2016-11-16
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0002] At present, the analysis of seismic wave attenuation characteristics based on rock physical models mostly stays in the discussion of reflection coefficients, while the establishment of models in traditional wave equation forward modeling is mostly based on the estimation of seismic wave velocity in actual formations, so the subjectivity of human intervention is increased. becomes inaccurate, and the geological model based on the rock physics model is more realistic, so the combination of the rock physics model and the forward modeling of the wave equation is an inevitable development trend of the numerical simulation method

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  • Gas containing sandstone reservoir seismic responding value simulating method based on rock physical model

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[0065] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following technical solutions in the present invention are clearly and completely described. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0066] The present invention provides a method for numerical simulation of seismic response of gas-bearing sandstone reservoirs based on a petrophysical model. The model is a spatially periodic arrangement of spherical plaque saturation models. The effective bulk modulus can be obtained by using the Gassmann equation to obtain the equivalent bulk modulus of the rock; at high frequencies, the bulk modulus of different fluids is first calculated according to the Gas...

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Abstract

The invention provides a gas containing sandstone reservoir seismic responding value simulating method based on a rock physical model. Based on a spherical patchy saturation model, the physical and seismic dynamic characteristics of common gas containing sandstone can be well described, and a diffusivity-viscosity wave equation theory is used to introduce the attenuation and energy loss caused by the existence of fluids during the propagation process of earthquake waves. The frequency-wave number domain diffusivity-viscosity wave equation is utilized to carry out forward modeling to effectively represent the geophysical characteristics of a rock physical model; and by combining the diffusivity characteristics and viscosity characteristics introduced by the diffusivity-viscosity theory, the seismic corresponding characteristics of common gas containing sandstone can be represented more directly and precisely.

Description

technical field [0001] The invention relates to the field of geological technology, in particular to a numerical simulation method for seismic response of gas-bearing sandstone reservoirs based on rock physics models. Background technique [0002] At present, the analysis of seismic wave attenuation characteristics based on rock physics models mostly stays in the discussion of reflection coefficients, while the establishment of models in traditional wave equation forward modeling is mostly based on the estimation of seismic wave velocity in the actual formation, so the subjectivity of human intervention is increased. Therefore, the combination of rock physics model and wave equation forward modeling is an inevitable development trend of numerical simulation methods. [0003] The patch saturation model is a petrophysical model saturated with fluid, partly gas-bearing and partly water-bearing, which can be used to simulate the petrophysical characteristics of conventional gas-...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 李世凯文晓涛李天张瑞张懿疆刘婷
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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