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Pre-stack earthquake three-dimensional multi-channel inversion method based on spatial structure constraint

A pre-stack seismic and tectonic technology, applied in seismic signal processing, instruments, calculations, etc., can solve the problems of inversion efficiency limitation, difficult 3D seismic multi-channel inversion, etc., to improve stability and fidelity, and improve inversion efficiency effect

Pending Publication Date: 2022-07-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, the existing structure-constrained inversion method is limited by the inversion efficiency, and it is difficult to apply to 3D seismic multi-channel inversion, especially 3D pre-stack seismic inversion

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  • Pre-stack earthquake three-dimensional multi-channel inversion method based on spatial structure constraint
  • Pre-stack earthquake three-dimensional multi-channel inversion method based on spatial structure constraint
  • Pre-stack earthquake three-dimensional multi-channel inversion method based on spatial structure constraint

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Embodiment Construction

[0048] In order to facilitate further understanding of the method of the present invention and the effect achieved, the following detailed description is now given in conjunction with the accompanying drawings.

[0049] The forward model for single-track inversion of pre-stack seismic is (taking the inversion of P-wave impedance, S-wave impedance and density as an example):

[0050]

[0051] In formula (A1), c 1 , c 2 and c 3 Represents the three coefficients related to the angle of incidence in the reflection coefficient equation, S i represents the seismic data of track i, θ j (j=1,...,h) represents the incident angle of the pre-stack seismic data, W is the angle-dependent seismic wavelet core matrix, and L is the first-order difference matrix. G is the forward calculus operator, m i is the logarithmic form of the longitudinal wave impedance I P , Shear wave impedance I S and density I D Composition of parameters to be inverted.

[0052] The existing pre-stack se...

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Abstract

The invention relates to the field of oil-gas exploration and development, and particularly discloses a pre-stack earthquake three-dimensional multi-channel inversion method based on spatial structure constraints. The method comprises the following steps: S1, estimating a stratigraphic dip angle based on three-dimensional seismic data, and constructing a space construction operator; s2, defining a three-dimensional matrix operation rule; and S3, constructing a pre-stack seismic multi-channel inversion target functional constrained by the spatial structure. According to the pre-stack seismic multichannel inversion method based on the spatial construction constraint, the construction mode of the spatial construction operator is developed, the strategy of introducing the construction operator into the target functional is improved, and the inversion efficiency of the three-dimensional pre-stack seismic is greatly improved.

Description

technical field [0001] The invention relates to the field of oil and gas exploration and development, in particular to the technical field of pre-stack seismic multi-channel inversion. Background technique [0002] As an effective way to obtain the elasticity, physical properties, rock properties and fluid-bearing properties of underground media, pre-stack seismic inversion is a key technology for quantitative prediction of reservoirs. The stability, reliability and fidelity of seismic amplitude prestack seismic inversion are the key influencing factors for reservoir quantitative interpretation. Multi-channel seismic inversion considers the internal relationship of adjacent seismic traces, which can preserve the structural characteristics of seismic inversion and improve inversion stability and fidelity. Therefore, it is of great significance to carry out pre-stack seismic multi-channel inversion research for reservoir quantitative prediction. [0003] There are many pre-s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36G06T17/10
CPCG01V1/362G06T17/10G01V2210/512G01V2210/64
Inventor 印兴耀杨亚明宗兆云李坤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)