Data acquisition designing method in three-dimensional seismic physical simulation

A 3D seismic and physical simulation technology, applied to seismic signal processing, seismic signal receivers, etc., to improve acquisition efficiency and improve acquisition quality

Active Publication Date: 2010-06-23
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Application Information

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Problems solved by technology

However, in the face of massive 3D information, numerical simulation is in a difficult situation. E

Method used

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  • Data acquisition designing method in three-dimensional seismic physical simulation
  • Data acquisition designing method in three-dimensional seismic physical simulation
  • Data acquisition designing method in three-dimensional seismic physical simulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Design of 3D Seismic Physical Model of Buried Hill Structure

[0035] Restricted by model material selection and processing technology, exploration targets with relatively complex three-dimensional geometric figures must be contoured first, and then properly regularized, and can even be further abstracted into a standard figure of geometry. For example, buried hill structures, salt dome structures or dome structures can be abstracted into a standard spherical cap geometry, see figure 2 .

Embodiment 2

[0036] Example 2: Scale Factor Design Skills for Earthquake Physical Models

[0037] There are four scaling factors in earthquake physics simulation: medium velocity ratio, geometric length ratio, time sampling ratio or vibration frequency ratio, but these four scaling factors are not all independent. For example, period (time) and frequency are reciprocals of each other, which can be regarded as the same factor, and 1 of 4 is removed, leaving 3. The length is equal to the speed times the time, which means that only any 2 of the remaining 3 factors are independent factors, and the technique for selecting these two independent factors is as follows.

[0038] Both the main frequency of the laboratory excitation probe and the main frequency of the seismic wave in the actual work area are known, so the factor of frequency should be considered first. The practical ultrasonic frequency range is very wide, generally in 10 4 ~107 Hz, but the excitation probes used in earthquake phys...

Embodiment 3

[0039] Example 3: Design and calculation of three-dimensional coverage times

[0040] In the second chapter of the authoritative book "Design and Construction of Land 3D Seismic Exploration", Andreas Cordsen (translated by Yu Shoupeng, etc.) expounded the formula for calculating the vertical and horizontal coverage times of the wire beam type 3D observation system: "Definition of vertical coverage times Similar to the number of coverage of two-dimensional data", that is, the number of longitudinal coverage Fi = (number of receiving channels × track spacing) / (2 × distance between guns); "the number of coverage in the horizontal line direction is very simple, which is half of the number of receiving lines in the array ". The above formula for calculating the number of horizontal coverages is just a special case. In fact, the number of horizontal coverages can be designed to be 1 / 2, 1 / 4 or 1 / 8 of the number of receiving lines. Therefore, a generalized calculation formula needs ...

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Abstract

The invention provides a data acquisition designing method in three-dimensional seismic physical simulation, which mainly comprises a data acquisition design flow, a seismic physical model design technology and a three-dimensional transverse coverage frequency calculation formula and a three-dimensional observation system template decomposing and composing method in the three-dimensional seismic physical simulation experiment. The design technology of a key part in the design of a three-dimensional seismic physical model refers to the design technology of simplifying, laminarizing, exploration target outlining and abstracting a work-area subsurface geologic structure as well as the design technology of a seismic physical model scale factor. By applying the method, the work efficiency and the experiment achievement quality of a seismic physical model laboratory can be improved. In recent years, the laboratory cooperates with domestic Daqing, Jilin, Liaohe, Jidong, Dagang, Shengli, Xinjiang, Changqing, Renqiu, Zhongyuan, Jiangsu, Jianghan oil fields and the like to conduct scores of three-dimensional seismic physical model experiments, thereby obtaining better effect.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a data acquisition design method for three-dimensional seismic physical simulation. Background technique [0002] Seismic simulation is divided into numerical simulation and physical model simulation. Seismic simulation technology has always played an important role in seismic exploration. With the help of seismic simulation technology, the correctness of the elastic wave theory of various media can be verified, and the development of elastic wave theory can be promoted; the optimal design of the observation system based on the model can be provided for seismic exploration, and the quality of field seismic data acquisition can be guaranteed; the seismic data processing can be provided The standard data body is used to test the correctness of the seismic processing method; in addition, it can also be used to test the correctness of the seismic data interpretation resul...

Claims

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Application Information

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IPC IPC(8): G01V1/16G01V1/28
Inventor 狄帮让魏建新
Owner BC P INC CHINA NAT PETROLEUM CORP
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