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Optimizing design method of 3D seismic observation system based on geologic geophysical model

A geophysical model, three-dimensional seismic technology, applied in geophysical measurement, seismology, measurement devices, etc., can solve problems such as inability to obtain seismic imaging, wrong seismic imaging results, and inapplicability

Inactive Publication Date: 2002-02-27
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0003] So far, most of the 3D observation system design software widely used at home and abroad are based on the horizontal layered geological model and the common central point (CMP) stacking principle, which are not suitable for the 3D seismic technical design of complex structures and high-dip formations.
In the case of complex structures, applying this kind of design scheme will not only fail to obtain high-quality seismic imaging, but may even lead to wrong seismic imaging results

Method used

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  • Optimizing design method of 3D seismic observation system based on geologic geophysical model
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  • Optimizing design method of 3D seismic observation system based on geologic geophysical model

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Embodiment Construction

[0016] The Key Laboratory of Geophysical Prospecting of China National Petroleum Corporation began to explore a new 3D acquisition technology design method based on CRP seismic imaging for the specific complex geological structure of the exploration area since 1996. The workflow of this method is as follows figure 1 Shown.

[0017] First, establish a priori geological geophysical model based on the existing exploration results (complex geological structure and complex geological body morphology and its geophysical parameters) in the exploration area, usually establish the seismic velocity model of the underground medium; the second step is based on the above-mentioned geological geophysical The model is the exploration target, and two or more observation systems for 3D seismic data acquisition are designed; the third step is to use the model as the 3D seismic observation object, and simulate the field seismic data in the laboratory according to the technical parameters and constru...

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Abstract

The optimized design method of geological geophysical model based three-dimensional seismological observation system includes the following steps: A). creating geological geophysical model; B). designing two kinds of several kinds of observation systems with three-dimentional geological data acquisition; C). adopting imaginary spectrum method and combinatino of three-dimensional wave equation numerical analog and three-dimensional geophysical model analog two methods of implement data acquisitino work; D). using common-reflection point as basis, making depth deviation treatment of acquired data before superposition to obtain several kinds of imaging results of seismic treatment; and E). making comprehensive comparison and evaluation of imaging quality of said imaging results and defining one optimum seismic imaging result. The invention is extensive in application range, can obtain good effect for making seismic exploration of petroleum and natural gas.

Description

Technical field [0001] The invention relates to a technical design optimization method for three-dimensional seismic exploration in petroleum, natural gas and other mineral resources and geological engineering, in particular to a three-dimensional seismic observation system optimization design method based on geological and geophysical models. Background technique [0002] The three major links of seismic exploration are acquisition, processing and interpretation. Acquisition is the foundation; the excitation system composed of seismic source excitation points on the ground and the receiving system composed of geophone receiving points must pass through the correct geometric distribution, that is, an optimized seismic observation system, in order to collect effective and complete underground geological structure information . Therefore, the observation system plays an important role in seismic exploration, and its design is directly related to the success or failure of the explor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/00
Inventor 牟永光狄帮让魏建新顾培成
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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