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Interval velocity model building method under complicated geological conditions

A technology with complex geological conditions and construction methods, which is applied in the field of layer velocity model construction, can solve problems such as filling and achieve the effect of accurate velocity models

Inactive Publication Date: 2014-11-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0026] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a layer velocity model construction method under complex geological conditions, which firstly solves the problem of time layer fitting under complex terrain conditions, and on this basis solves the problem of layer velocity filling and the problem of velocity modeling

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  • Interval velocity model building method under complicated geological conditions
  • Interval velocity model building method under complicated geological conditions
  • Interval velocity model building method under complicated geological conditions

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Embodiment Construction

[0068] The complex topographical conditions mentioned in the present invention mainly refer to overthrust faults, or the mixed appearance of reverse faults and normal faults.

[0069] Before introducing this program, first introduce the concept of faults:

[0070] Due to the movement of the plate, the rock layer is squeezed or pulled. When the force reaches a certain level, the rock layer will break, and the two parts of the rock layer will continue to move along the fracture surface, forming a fault. According to the different formation methods of faults, faults are generally divided into three categories: normal faults, reverse faults and vertical faults.

[0071] If the two parts of the disconnected rock formations are stretched by tension and gravity, the rock mass of the hanging wall of the fault will fall relatively, and the footwall will rise relatively, thus producing a normal fault;

[0072] If the two parts of the disconnected rock formations are horizontally compre...

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Abstract

The invention discloses an interval velocity model building method under complicated geological conditions, firstly solves the problem of time dimension fitting under complicated terrain conditions and also solves the problems of interval velocity filling and speed modeling on the basis of the solving of the problem of time dimension fitting. The interval velocity model building method disclosed by the invention has the following positive effects: in the interval forming process, data is pretreated by utilizing the concepts of grid and hanging wall and footwall of faults, the concept of group of faults is also introduced, so that an interval time model is built more efficiently; a certain number of primary interval velocity data is utilized to fit the velocities of the hanging wall and the footwall of the faults more accurately, so that a more accurate velocity model is obtained.

Description

technical field [0001] The invention belongs to the technical field of geological modeling, in particular to a layer velocity model building method under complicated geological conditions. Background technique [0002] In the process of geological exploration, seismic velocity is an indispensable parameter for structural interpretation such as time-depth conversion, lithology prediction, and structural modeling. Accurately establishing a seismic velocity model is one of the important tasks in the process of geological exploration. In order to establish an earthquake velocity model, it is first necessary to establish a horizon time model, and then fill the horizon velocity into the established horizon time model in an appropriate way. Now briefly describe these two steps and how to achieve them: [0003] 1) Establish an accurate horizon time model: This step requires gridding the original horizon data and generating horizons. The horizon data gridding is to use the original...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
Inventor 姚兴苗贾进文胡光岷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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