CN105005078B - A kind of quick time and depth transfer method of seismic data based on rate pattern - Google Patents
A kind of quick time and depth transfer method of seismic data based on rate pattern Download PDFInfo
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Abstract
A kind of quick time and depth transfer method of seismic data based on rate pattern, includes the following steps：S1 obtains seismic survey lines and seismic data cube；And the data of the seismic data cube are read along the seismic survey lines；S2, acquisition speed model；And extract the rate pattern along the seismic survey lines；S3 carries out time and depth transfer successively to the seismic data of the seismic data cube using the rate pattern after extraction according to equally spaced time-domain；S4 generates the seismic cross-section of Depth Domain according to transformed data and shows in the window.The present invention directly carries out time-domain seismic data resampling generation depth numeric field data, and real-time display depth numeric field data in the window using time and depth transfer algorithm.The time and depth transfer of 23 hours is originally needed, our method only needs can complete for 38 seconds.It greatly improves the efficiency, meets the requirement to earthquake real-time property such as engineering.
Description
Technical field
The invention belongs to the technical fields of petroleum exploration and petroleum drilling engineering, and in particular to a kind of based on rate pattern
The quick time and depth transfer method of seismic data.
Background technology
The conversion of seismic data depth be unable to do without computer software auxiliary and performs, and traditional seismic data goes to depth by time-domain
Domain process is spent, it is necessary to carry out time and depth transfer to seismic data first with rate pattern, the data volume of time-domain is converted and adopt again
Sample then is loaded into software in the form of depth numeric field data, could so be used in Depth Domain into the data volume of Depth Domain, whole
A process needs 2-3 hour, and efficiency is very low.Such efficiency cannot meet the needs of with the engineerings such as geosteering are bored.
The content of the invention
In order to solve the above problem existing in the prior art, the present invention provides a kind of seismic datas based on rate pattern
Quick time and depth transfer method.
The technical solution adopted in the present invention is：
A kind of quick time and depth transfer method of seismic data based on rate pattern, includes the following steps：
S1 obtains seismic survey lines and seismic data cube；And the data of the seismic data cube are read along the seismic survey lines；
S2, acquisition speed model；And extract the rate pattern along the seismic survey lines；
S3, using the rate pattern after extraction to the seismic data of the seismic data cube according to the equally spaced time
Domain carries out time and depth transfer successively；
S4 generates the seismic cross-section of Depth Domain according to transformed data and shows in the window.
Preferably, the data of the seismic data cube are the data gathered according to time-domain.
Preferably, in S2, the rate pattern of acquisition is level rate pattern.
Preferably, in S3, using the rate pattern after extraction to the seismic data of the seismic data cube according to etc.
The specific method that interlude domain carries out time and depth transfer successively is：
The rate pattern includes initial layers, bottom layer and top layers；If average speed is V；The average speed of initial layers
For V0；The average speed of bottom layer is Vi；The time depth of top layers is t0；The time depth of bottom layer is ti；Current time
Depth value is time；Then：
V=V0+ (Vi-V0) * (time-t0)/(ti-t0)
Time is multiplied by according to average speed, equal to depth, the deep conversion of when realization.
Preferably, in S2, the rate pattern of acquisition replaces with three-dimensional velocity structure.
Preferably, in S3, using the rate pattern after extraction to the seismic data of the seismic data cube according to etc.
The specific method that interlude domain carries out time and depth transfer successively is：
Extract the data of the three-dimensional velocity structure；
The three-dimensional velocity structure is carried out according to the seismic data of the seismic data cube according to equally spaced time-domain
Division；Three-dimensional velocity structure after the seismic data of the seismic data cube and division is corresponded, it is deep during realization
Conversion.
Beneficial effects of the present invention are：
The present invention utilizes time and depth transfer algorithm, and resampling generation depth numeric field data is directly carried out to time-domain seismic data,
And real-time display depth numeric field data in the window.The time and depth transfer of 2-3 hour is originally needed, our method only needs 3-8
Second can complete.It greatly improves the efficiency, meets the requirement to earthquake real-time property such as engineering.
Description of the drawings
Fig. 1 is the flow diagram that traditional seismic data is gone to Depth Domain by time-domain；
Fig. 2 is the flow diagram of the quick time and depth transfer method of seismic data the present invention is based on rate pattern.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing, to the present invention into
Row is further described.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, it is not used to
Limit the present invention.
As shown in Figure 1, in the prior art, traditional seismic data by time-domain go to Depth Domain process need first with
Rate pattern carries out time and depth transfer to seismic data, the conversion of the data volume of time-domain and resampling into the data volume of Depth Domain,
It being loaded into software with Depth Domain data mode, could so be used in Depth Domain again, whole process needs 2-3 hour,
Efficiency is very low, it is impossible to meet the needs of with the engineerings such as geosteering are bored.
As shown in Fig. 2, the defects of for the prior art, since the drawing mechanism that traditional seismic profile is shown is fairly simple,
The present invention realizes that quick time and depth transfer is mainly improved the display mechanism of seismic profile, compared with traditional display mechanism
Complicated is more；Concrete methods of realizing is as follows：
A kind of quick time and depth transfer method of seismic data based on rate pattern, includes the following steps：
S1 obtains seismic survey lines and seismic data cube；And the data of seismic data cube are read along seismic survey lines；
S2, acquisition speed model；And along seismic survey lines extraction rate model；
S3, using the rate pattern after extraction to the seismic data of seismic data cube according to equally spaced time-domain successively into
Row time and depth transfer；
S4 generates the seismic cross-section of Depth Domain according to transformed data and shows in the window.
The data of seismic data cube are the data gathered according to time-domain.
In S2, the rate pattern of acquisition is level rate pattern.
In S3, using the rate pattern after extraction to the seismic data of seismic data cube according to equally spaced time-domain successively
Carry out time and depth transfer specific method be：
Rate pattern includes initial layers, bottom layer and top layers；If average speed is V；The average speed of initial layers is V0；
The average speed of bottom layer is Vi；The time depth of top layers is t0；The time depth of bottom layer is ti；Current time depth value
For time；Then：
V=V0+ (Vi-V0) * (time-t0)/(ti-t0)
Time is multiplied by according to average speed, equal to depth, the deep conversion of when realization.
In S2, the rate pattern of acquisition replaces with three-dimensional velocity structure.
In S3, using the rate pattern after extraction to the seismic data of seismic data cube according to equally spaced time-domain successively
Carry out time and depth transfer specific method be：
Extract the data of three-dimensional velocity structure；
Three-dimensional velocity structure is divided according to the seismic data of seismic data cube according to equally spaced time-domain；By ground
Shake data volume seismic data and division after three-dimensional velocity structure corresponded, deep conversion during realization.This method master
It is relatively simple that time and depth transfer is carried out using three-dimensional velocity structure, extracts three-dimensional velocity structure data, interpolation is adopted with earthquake
With interval is identical directly time and depth transfer can be carried out using rate pattern.Due to turning deeply when needing and seismic data cube being carried out
It changes, three-dimensional velocity structure is not smooth enough under normal conditions, it is therefore proposed that carrying out time and depth transfer using level rate pattern.
The solution of the present invention is reading seismic data and rate pattern simultaneously along seismic survey lines, deep when the present invention utilizes quick
Transfer algorithm, directly to time-domain seismic data into between-line spacing same time domain progress resampling generation depth numeric field data, and
Real-time display depth numeric field data in window.Turn technology deeply when more previous, our invention substantially reduce time and depth transfer when
Between, improve efficiency.Our method can meet the requirement to earthquake real-time property such as engineering.
The present invention is not limited to above-mentioned preferred forms, anyone can show that other are various under the enlightenment of the present invention
The product of form, however, make any variation in its shape or structure, it is every that there is skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (1)
1. a kind of quick time and depth transfer method of seismic data based on rate pattern, which is characterized in that include the following steps：
S1 obtains seismic survey lines and seismic data cube；And the data of the seismic data cube are read along the seismic survey lines；
S2 obtains three-dimensional velocity structure；And extract the three-dimensional velocity structure along the seismic survey lines；
S3, using the three-dimensional velocity structure after extraction to the seismic data of the seismic data cube according to the equally spaced time
Domain carries out time and depth transfer successively；
S4 generates the seismic cross-section of Depth Domain according to transformed data and shows in the window；
The data of the seismic data cube are the data gathered according to time-domain；
In S3, using the three-dimensional velocity structure after extraction to the seismic data of the seismic data cube according to it is equally spaced when
Between domain carry out the specific method of time and depth transfer successively and be：
Extract the data of the three-dimensional velocity structure；
The three-dimensional velocity structure is divided according to the seismic data of the seismic data cube according to equally spaced time-domain；
Three-dimensional velocity structure after the seismic data of the seismic data cube and division is corresponded, deep conversion during realization.
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| CN110045416B (en) * | 2019-04-29 | 2021-02-12 | 吉奥索特（北京）科技有限公司 | Method for rapidly extracting seismic section data of cross-three-dimensional seismic work area |
| CN113687418B (en) * | 2021-08-24 | 2023-07-21 | 太原理工大学 | Fine Time-Depth Transformation Method for Seismic Data Based on High-Resolution Inversion Velocity Volume |
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