CN110019002B - Method and system for quickly cataloging pre-stack data - Google Patents
Method and system for quickly cataloging pre-stack data Download PDFInfo
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- CN110019002B CN110019002B CN201710725134.3A CN201710725134A CN110019002B CN 110019002 B CN110019002 B CN 110019002B CN 201710725134 A CN201710725134 A CN 201710725134A CN 110019002 B CN110019002 B CN 110019002B
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Abstract
The invention provides a method and a system for quickly cataloging pre-stack data, wherein the method comprises the following steps: analyzing the seismic data file in the SEGY format before stacking, reading a predetermined amount of track head information each time, and creating a track head information file; creating a null track index by using the track header information file; and recording the storage position of the seismic data file in the SEGY format before the stack. In order to efficiently catalog pre-stack data and achieve correct effect, the invention adopts virtual truncation of pre-stack big data, traverses regular data, searches out the range of the line number in the whole file, records the actual line number offset position for irregular data, and records the storage position of the original file.
Description
Technical Field
The invention relates to the field of oil-gas geophysical exploration, relates to a seismic data processing technology, and particularly relates to a method and a system for quickly cataloging pre-stack data.
Background
At present, most old oil fields on land in China enter the middle and later stages of development, technical problems of residual oil and gas detection, injection and production scheme adjustment, thin reservoir prediction, reservoir attribute extraction and the like are generally encountered, and the precision requirement of oil field development on seismic data is higher and higher. In order to effectively extend the geophysical prospecting technology to the oil reservoir field, more detailed seismic information needs to be obtained, so that the seismic exploration is gradually developed towards the directions of a wide frequency band and a full wave field, and the seismic acquisition system is required to have the extra-large-scale seismic channel number and be capable of recording the ground wave field information in an all-round and high-density manner.
The high-density seismic technology is the development direction of future exploration technology, and the core of the high-density seismic technology is weakening field combination according to the full, uniform and symmetrical spatial sampling principle, and ensuring the originality of seismic signals and noise wave fields; intensive spatial sampling ensures the sufficiency of prestack imaging spatial data, provides conditions for implementing a prestack migration imaging integrated solution, and lays a foundation for acquiring result data with high signal-to-noise ratio, high resolution and high fidelity. However, the analysis and processing of indoor data by mass data obtained by high-density exploration bring great challenges, the TB-level data before stacking is often rare, how to rapidly analyze the original data by adopting an effective technical means, perform quality monitoring on the data of each link in the processing, and ensure the processing effect of the mass data is the primary problem faced by processing personnel.
Disclosure of Invention
Through a method for quickly cataloging pre-stack data, the pre-stack TB-level data can be quickly analyzed, and after the cataloged data are put in storage, if the storage position of the pre-stack data is moved, the storage position of the pre-stack data can be repositioned by modifying the IP address for storing the pre-stack data, and the pre-stack data do not need to be cataloged and put in storage again. In the cataloging process, the quality of the data of each link in the processing is monitored, and the correct cataloging and warehousing of mass data are ensured.
According to one aspect of the invention, a method for quickly cataloging pre-stack data is provided, which comprises the following steps:
analyzing the seismic data file in the SEGY format before stacking, reading a predetermined amount of track head information each time, and creating a track head information file;
creating a null track index by using the track header information file;
and recording the storage position of the seismic data file in the SEGY format before the stack.
Further, before the track head information file is created, whether the size of the SEGY format seismic data file before the stack exceeds a preset size or not is judged, and if the size exceeds the preset size, the SEGY format seismic data file is divided according to the preset size.
Furthermore, when the SEGY-format seismic data file is segmented, the position information of the truncated line signals is recorded, and the original physical file is not changed.
Further, for the structured file, creating the empty track index by using the track header information file includes writing a function interface for recording information of missing line numbers, track numbers, sequence numbers in the tracks, and the number of missing empty tracks.
Further, the creating of the empty track index by using the track header information file includes writing a function interface for recording offset position information of each line where each track number is located.
Further, the storage position of the seismic data file in the SEGY format before the stack is recorded comprises the IP address of a machine for storing the file and the position of a disc where the machine is located.
Further, the header information file includes: number of lines, line range, cdp range, intra-track sequence number range, and cdp number per line number.
Further, the structured file is a file with sequence numbers in tracks arranged from small to large.
Further, the irregular files are files with the sequence numbers in the tracks arranged out of order.
According to another aspect of the present invention, there is provided a system for rapid pre-stack data cataloging, the system comprising:
a memory storing computer-executable instructions;
a processor executing computer executable instructions in the memory to perform the steps of:
analyzing the seismic data file in the SEGY format before stacking, reading a predetermined amount of track head information each time, and creating a track head information file;
creating a null track index by using the track header information file;
and recording the storage position of the seismic data file in the SEGY format before the stack.
The method can rapidly analyze the TB-level data before the stack, and can reposition the storage position of the data before the stack by modifying the IP address for storing the data before the stack if the storage position of the data before the stack is moved after the data before the stack is stored in the warehouse, without the need of re-cataloguing and warehousing the data before the stack. In the cataloging process, the quality of the data of each link in the processing is monitored, and the correct cataloging and warehousing of mass data are ensured. The defects that the data coding is incorrect due to large pre-stack data and irregular data can be overcome.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in greater detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 illustrates a flow diagram of a method for rapid cataloging of pre-stack data.
FIG. 2 illustrates an effect diagram of fast pre-stack data cataloging according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to efficiently catalog pre-stack data and achieve correct effect, the invention adopts virtual truncation of pre-stack big data, traverses regular data, searches out the range of the line number in the whole file, records the actual line number offset position for irregular data, and records the storage position of the original file.
As shown in FIG. 1, the present invention provides a method for quickly cataloging prestack data, which comprises the following steps:
analyzing the seismic data file in the SEGY format before stacking, reading a predetermined amount of track head information each time, and creating a track head information file;
creating a null track index by using the track header information file;
and recording the storage position of the seismic data file in the SEGY format before the stack.
Further, before the track head information file is created, whether the size of the SEGY format seismic data file before the stack exceeds a preset size or not is judged, and if the size exceeds the preset size, the SEGY format seismic data file is divided according to the preset size.
In this embodiment, if the size of the pre-stack SEGY-format seismic data file is judged to be larger than 120G, the file is divided according to the size of 120G, each part is not larger than 120G, the original physical file is not changed, and only the position information of the truncated line signals is recorded. By splitting the file, on the one hand, efficiency is improved and on the other hand, data overflow during authoring is prevented.
In this embodiment, the pre-stack SEGY format seismic data file is analyzed, ten thousand tracks of track header information are read each time, and a track header information file is created, where the track header information file is as follows:
preferably, the header information file includes: number of lines, line range, cdp range, intra-track sequence number range, and cdp number per line number.
Creating a null track index using a track header information file includes two cases:
(1) the ordered files refer to the sequence numbers in the channels which are arranged from small to large, such as 1\2\3.
For a regular file, writing a function interface SetNullTraceIndex (wDBRecTraceIndex _3D trace _ idx, int num), wherein the information of missing line numbers, track numbers and in-track sequence numbers is put in the wDBRecTraceIndex _3D trace _ idx, and the int num refers to the number of missing empty tracks.
(2) An irregular file refers to an unordered arrangement of sequence numbers within a track, e.g., all 0's or 3, 4, 5, 1, 2, 12.
For irregular files, functional interfaces of appendix onetraceindex (int line _ id, int cdp _ no, long long trace _ data _ file _ addr), int line _ id line number and int cdp _ no track number are written, and the function records offset positions of each line and each track number.
The first method is directed at regular data, and the empty track is relatively small, so that the occupied memory is small, and then the offset position of the effective track is calculated by using the information of the empty track, and the efficiency is relatively low in the calculation process. The second method records the offset position of each line and each track aiming at irregular data, occupies a large memory, but does not need to calculate the position of an effective track, so the efficiency is relatively high.
Finally, recording the storage position of the seismic data file in the SEGY format before the stack, the IP address of the machine + the position of the disc, such as: 10.225.76.26F:/SEIS _ DATA/. The method aims to change the stored server for the pre-stack SEGY-format seismic data file, only change the information of the recorded storage position and do not need to catalog the pre-stack data again.
According to another aspect of the present invention, there is provided a system for rapid pre-stack data cataloging, the system comprising:
a memory storing computer-executable instructions;
a processor executing computer executable instructions in the memory to perform the steps of:
analyzing the seismic data file in the SEGY format before stacking, reading a predetermined amount of track head information each time, and creating a track head information file;
creating a null track index by using the track header information file;
and recording the storage position of the seismic data file in the SEGY format before the stack.
To facilitate understanding of the solution of the embodiments of the present invention and the effects thereof, a specific application example is given below. It will be understood by those skilled in the art that this example is merely for the purpose of facilitating an understanding of the present invention and that any specific details thereof are not intended to limit the invention in any way.
The actual effect is shown in figure 2. Regular pre-stack data calculates the offset position of an effective gather through a clear track index, irregular pre-stack data directly passes through the offset position of each track, original pre-stack seismic data is accessed in the mode, the offset position where the data are located can be rapidly located, then the data of a certain track of a certain line are read into a cache, the pre-stack original seismic data are displayed in a waveform area-variable mode, the horizontal coordinate is the in-track sequence number (namely stacking times) in the certain track of the certain line, the vertical coordinate is time, and the size of the seismic data value represents the strength of amplitude. The use of the attached figure 2 can monitor the quality of data and ensure the cataloging and warehousing effect of mass pre-stack seismic data.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (6)
1. A method for quickly cataloging prestack data is characterized by comprising the following steps:
analyzing the seismic data file in the SEGY format before stacking, reading a predetermined amount of track head information each time, and creating a track head information file;
creating a null track index by using the track header information file;
recording the storage position of the seismic data file in the SEGY format before stacking;
for a regular file, creating a null track index by using a track header information file comprises writing a function interface, and recording information of missing line numbers, track numbers, sequence numbers in tracks and the number of missing null tracks;
for an irregular file, the creating of the empty track index by using the track header information file comprises writing a function interface, which is used for recording offset position information of each line and each track number;
the regular files are files with the sequence numbers in the tracks arranged from small to large, and the irregular files are files with the sequence numbers in the tracks arranged in an unordered mode.
2. The method of claim 1, wherein before creating the header information file, determining whether the size of the SEGY format seismic data file before the pre-stack exceeds a predetermined size, and if so, dividing the SEGY format seismic data file by the predetermined size.
3. The method of claim 2, wherein when segmenting the SEGY format seismic data file, the truncated trace number position information is recorded without changing the original physical file.
4. The method of claim 1, wherein recording the storage location of the pre-stack SEGY format seismic data file comprises recording the IP address of the machine used to store the file and the location of the disk.
5. The method for rapid pre-stack data cataloging according to claim 1, wherein said header information file comprises: number of lines, line range, cdp range, intra-track sequence number range, and cdp number per line number.
6. A system for rapid pre-stack data cataloging, the system comprising:
a memory storing computer-executable instructions;
a processor executing computer executable instructions in the memory to perform the steps of:
analyzing the seismic data file in the SEGY format before stacking, reading a predetermined amount of track head information each time, and creating a track head information file;
creating a null track index by using the track header information file;
recording the storage position of the seismic data file in the SEGY format before stacking;
for a regular file, creating a null track index by using a track header information file comprises writing a function interface, and recording information of missing line numbers, track numbers, sequence numbers in tracks and the number of missing null tracks;
for an irregular file, the creating of the empty track index by using the track header information file comprises writing a function interface, which is used for recording offset position information of each line and each track number;
the regular files are files with the sequence numbers in the tracks arranged from small to large, and the irregular files are files with the sequence numbers in the tracks arranged in an unordered mode.
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