Prestack seismic inversion method and device

A pre-stack seismic and inversion technology, applied in the field of geological exploration, can solve the problems of lack of sparsity, low inversion efficiency, slow convergence speed of seismic inversion, etc., and achieve the goal of improving inversion resolution and inversion efficiency. Effect

Active Publication Date: 2022-08-05
北京阳光杰科科技股份有限公司
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Problems solved by technology

This assumption only considers most of the data distribution area, does not have sparsity, and cannot improve the resolution of the inversion; at the same time, the convergence speed of traditional pre-stack seismic inversion is slow
[0005] Therefore, the existing pre-stack seismic inversion has the problems of low inversion efficiency and low inversion resolution

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  • Prestack seismic inversion method and device
  • Prestack seismic inversion method and device
  • Prestack seismic inversion method and device

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Embodiment Construction

[0031] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but not to limit the present invention.

[0032] Although the present invention provides method operation steps or device structures as shown in the following embodiments or accompanying drawings, more or less operation steps or module units may be included in the method or device based on routine or without creative work. . In the steps or structures that logically do not have a necessary causal relationship, the execution order of these steps or the module structure of the apparatus is not limited to the execution order or module structure shown in the embodiments of the present invention ...

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Abstract

The invention discloses a pre-stack seismic inversion method and device. The method includes collecting pre-stack seismic data of a target reservoir; modeling to determine a priori model and an inversion initial model as a current inversion iterative model; The seismic angle gather of the layer and the current inversion iterative model determine the energy error; if the energy error is not less than the preset energy error, the updated inversion iterative model is determined according to the prior model of the pre-stack seismic data and the current inversion iterative model, The updated inversion iterative model is used as the current inversion iterative model, and the energy error is determined iteratively; if the energy error is smaller than the preset energy error, the current inversion iterative model when the energy error is smaller than the preset energy error is used as the prestack seismic data. Inversion results. In the present invention, the energy error satisfies the Gaussian probability distribution, the updated inversion iteration model satisfies the Cauchy probability distribution, and the update iteration until the energy error is smaller than the preset energy error can improve inversion efficiency and inversion resolution.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to a pre-stack seismic inversion method and device. Background technique [0002] This section is intended to provide a background or context to the embodiments of the invention recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Reservoir physical characteristic parameters reflect the spatial distribution of oil and gas and the estimation of oil and gas reserves, and directly affect the design and recovery of oil and gas development plans. It has always been a focus of oil and gas exploration and development research. With the increasing difficulty of exploration and development of oil and gas fields and the development of technology, the research on geophysical methods and technologies for reservoir prediction and fluid detection has made remarkable progress in recent years. Seismic inversion is on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/282
Inventor 蒋龙聪游俊
Owner 北京阳光杰科科技股份有限公司
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