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Gather optimized processing method and device thereof

A processing method and technology of a processing device, which are applied in the direction of seismic signal processing, etc., can solve the problems that the characteristics of the underground medium cannot be truly revealed, the signal-to-noise ratio of the pre-stack gather data is not high, and the gather amplitude energy is unreal, so as to achieve de-noising. The effect of strong ability, improved accuracy, and improved amplitude fidelity

Inactive Publication Date: 2015-07-29
EXPLORATION & DEV RES INST OFSINOPEC JIANGHAN OILFIELD
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Problems solved by technology

Conventional seismic data processing is mainly aimed at structural imaging and structural interpretation, and the generated pre-stack gathers usually have the following three problems: 1. The signal-to-noise ratio of the pre-stack gather data is not high; Due to the influence of dynamic velocity, wavelet, anisotropy and other factors, the gather event is not flat; 3. Due to the divergence and absorption of seismic waves in the process of propagation in complex underground media, the non-amplitude processing in data processing, and the limitations of mountainous seismic observation systems Influenced by factors such as defects, the actual gather amplitude energy is not true, and the change of gather amplitude with offset cannot truly reveal the characteristics of the underground medium

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  • Gather optimized processing method and device thereof
  • Gather optimized processing method and device thereof

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[0031] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] The invention proposes a gather optimization processing method.

[0033] refer to figure 1 , figure 1 It is a schematic flowchart of a preferred embodiment of the gather optimization processing method of the present invention.

[0034] In this preferred embodiment, a gather optimization processing method includes the following steps:

[0035] Step S10, using the Radon transform filter method to perform noise attenuation processing on the actually obtained pre-stack gather;

[0036] The main noises in prestack gathers are random noise, multiple waves, and linear interference. There are mainly two types of methods for multiple wave suppression: filtering method and method based on wave equation prediction. Based on the wave equation prediction method, there is no assumption about the subsurface medium, but t...

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Abstract

The invention discloses a gather optimized processing method. The gather optimized processing method comprises the following steps of carrying out noise attenuation processing on actually-obtained pre-stack gathers by adopting a Radon conversion filtering method; carrying out gather leveling processing on the pre-stack gathers which are subjected to the noise attenuation processing by adopting a static correction method; carrying out amplitude correction processing on the pre-stack gathers which are subjected to the gather leveling processing by adopting a background tendency energy compensation method based on model AVO (Amplitude Variation with Offset) characteristics. According to the gather optimized processing method, the Radon conversion filtering method can be used for removing multiple waves, linear interference, random noises and the like in the gathers; the gather optimized processing method has a strong noise elimination capability and is less damage to signals; the gather leveling adopts the static correction method so that the gathers can be leveled better; furthermore, the amplitude correction adopts background tendency energy compensation based on the model AVO characteristics, and the characteristic that the amplitude of the gathers are changed along the offset distance is accurately corrected.

Description

technical field [0001] The invention relates to the technical field of seismic gathers, in particular to a gather optimization processing method and a device thereof. Background technique [0002] The pre-stack inversion technology makes full use of the information on the change of seismic amplitude with offset (angle) to quantitatively estimate the elastic parameters (such as P-wave velocity, shear-wave velocity, density, etc.) important role in forecasting. The basis of prestack inversion is a high-quality prestack CRP gather, which generally requires a high signal-to-noise ratio, event level, and amplitude fidelity. Conventional seismic data processing is mainly aimed at structural imaging and structural interpretation, and the generated pre-stack gathers usually have the following three problems: 1. The signal-to-noise ratio of the pre-stack gather data is not high; Due to the influence of dynamic velocity, wavelet, anisotropy and other factors, the gather event is not...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
Inventor 邹贤军朱志勇郁飞刘启凤阎赓实
Owner EXPLORATION & DEV RES INST OFSINOPEC JIANGHAN OILFIELD
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