This section documents the support information available as Auxiliary Data. Auxiliary data may be imported from foreign data formats or output as foreign data formats. Auxiliary Data items currently available may be selected from the processing list below (A-P or R-Z):
Each of the auxiliary data types can be created and edited within Flowchart. Following are two examples: in the first example, we manually create and write a source SPS file; in the second example, we will retrieve and edit an existing source SPS file.
In this first example, we create and write a new SPS file in SPW.
Step 1. Click on Auxillary Data R-Z from the list of Processing Categories.
Step 2. Click on the SPS Source Locations auxillary card data file from the list.
An example of selecting the SPS Source Locations auxillary data file.
Step 3. Click on the FlowChart canvas to place the SPS Source Locations icon. You may click and drag the icon to relocate it. Double click on the SPS Source Locations auxillary card data file to open it.
Step 4. To create a new SPS Source Point Record, click on the File Browse button. A dialog box allows you to enter a desired name for your new file (e.g. NewFile) in the File name: text entry box and clicking Open.
Step 5. Click on Save changes. Notice that the directory path is automatically saved to the Survey directory. Notice also the empty columns.
Step 6. Select adds rows to create a spreadsheet for data entry. When the Add Rows dialog box comes up, enter the number of rows desired, click OK and then Save changes.
Step 7. Click on the Insert rows in spreadsheet button at the bottom of the SPS Source Point Record to add a single row one at a time if desired.
Most values may be entered in the spreadsheet by using the fill column function.
If a column is not selected, an error check dialog box will prompt you to select a single column to fill.
Step 8. Select a column to fill in the spreadsheet by clicking on the column header (e.g. Point number).
Step 9. Enter the Starting value, the Increment value and the Number of items in pattern and click Apply to fill the column you have selected.
Example of using the Fill Columns dialog box.
Cell Math may also be used to edit information in the SPS Source Point Record.
Step 10. Click on the Cell math calculator button to view the functions available with the Cell Math Calculator.
An example of selecting the Cell math calculator button.
The Cell Math Calculator consists of intuitive functions that can be used to edit the values in card data spreadsheet.
Click on the Apply button then Close to exit when finished with the Cell Math Calculator. When finished in the spreadsheet, be sure to Save changes and click OK to exit.
In this second example, we will locate and manually edit an existing SPS file in SPW.
Step 1. Select the File Browse button to call an existing Source Locations SPS Format auxiliary card data file into the Flowchart.
Step 2. Select the Map tab to view the basemap of the same file.
Step 3. To view and analyze the data format click on the Analyze Format button in the lower right portion of the SPS Source Point dialog box.
SPS Receiver Point Records may be created and edited in the same way as SPS Source Point Records or they may be created in Microsoft Excel and then copied and pasted into SPW.
Below is an excerpt from SPW Help for specifying an SPS Point Record.
General description:
The SPS Point Record is used to describe shot and receiver positions in a land seismic survey. In the case of a shot location, the point record contains details regarding the position of the shot at the time of recording. In the case of a receiver location, the point record contains details regarding the position of the receiver at the time of the first shot recorded into that receiver.
Point Record Specification:
Field definition |
Columns |
Format |
Minimum & Maximum |
Record ID |
1-1 |
ASCII |
R or S |
Line name |
2-17 |
ASCII |
Free form |
Point number |
18-25 |
ASCII |
Free form |
Point index |
26-26 |
Integer |
1-9 |
Point code |
27-28 |
ASCII |
|
Static correction |
29-32 |
Integer |
-999 to +999 |
Point depth |
33-36 |
Floating point |
0 to 99.9 |
Seismic datum |
37-40 |
Integer |
-999 to + 9999 |
Uphole time |
41-42 |
Integer |
0 to 99 |
Water depth |
43-46 |
Floating point |
0 to 99.9 or 0 to 999 |
Easting |
47-55 |
Floating point |
None |
Northing |
56-65 |
Floating point |
None |
Elevation |
66-71 |
Floating point |
-999.9 to + 9999.9 |
Day of year |
72-74 |
Integer |
1 to 999 |
Time of day |
75-80 |
Integer |
0 to 235959 |
Point Record Description:
Record ID: R identifies the record as a receiver record. S identifies the record as a shot record
Line name: Identifier for the shotpoint or receiver line.
Point number: Identifier for the shotpoint or receiver group number.
Point index: Index of the shotpoint or receiver number. In the case of shotpoints, 1 indicates the first shot at the specified location. The value of the index is incremented by 1 for each additional shot at the specified location. In the case of receivers, 1 indicates the first positioning of the receiver at the specified location. The value of the index is incremented by 1 each time the receiver group is moved or repositioned.
Point code: A code that characterizes the shot or receiver used at the point.
Static correction: The shot or receiver static, in units of milliseconds, that has been computed in the field to correct the seismic recording for the effects of elevation, weathering thickness, or weathering velocity at the point. The correction is referenced to the seismic datum specified in field 8.
Point depth: The depth of the shot or receiver.
Seismic datum: Elevation of the seismic datum.
Uphole time: In the case of a shot, this is the vertical traveltime from the charge to surface, in units of milliseconds. The value is always positive.
Water depth: The measured height of the water surface above the seafloor or water bottom. In the case of shotpoints, the value should be the depth at the time of recording. In the case of receivers, the value should be the depth at the time of recording the first shot into the receiver.
Easting: Map easting for the point. The coordinate system is defined in header H13 of the point record.
Northing: Map northing for the point. The coordinate system is defined in header H13 of the point record.
Elevation: Suface elevation with respect to the datum defined in header H17 of the point record. Elevations above datum are positive. In the case of shotpoints, the value should be the elevation at the time of recording. In the case of receivers, the value should be the elevation at the time of recording the first shot into the receiver.
Day of year: Julian day of recording. In the case of shotpoints, the value should be the day of recording the shot. In the case of receivers, the value should be the day of recording the first shot into the receiver.
In addition to calling existing files into or creating new data files within SPW, you may create data in a Microsoft Excel spreadsheet and transfer these data into any auxulliary card data record spreadsheet. To transfer a few data values, simply copy and paste from the Excel spreadsheet to the SPW card data file spreadsheet. However, the array of data you cut from Exel must match in size the area you select in the SPW spreadsheet prior to pasting.
To transfer an entire file, you will need to reformat the Excel file as an SPW card data file. The following example will demonstrate how to create a SPS Receiver Point Record in Excel and format the file for use in the SPW Flowchart.
Step 1. Open the Excel application.
Step 2. Determine or set the width of the required amount of columns. Locate the format drop-lown list on the right side of the tool bar above the spreadsheet.
Step 3. The column width is set by clicking on the Format menu and selecting Column Width.
The default width of an Excel spreadsheet column is 8.43, which means you will get 8 spaces if you save the file as a space delimited text file).
Step 4. You can format each column from the Point Record Specification list (see above).Since the first column is defined for identifying the field record for either source or receiver card data (R or S) and uses only 1 column, set the column width to 1 and click OK.
Field definition |
Columns |
Format |
Minimum & Maximum |
Record ID |
1-1 |
ASCII |
R or S |
Step 5. Click on the Format dropdown menu and select Format Cells and set the format to Text (ie. ASCII) on the Number tab. Set all text left-to-right.
Field definition |
Columns |
Format |
Minimum & Maximum |
Record ID |
1-1 |
ASCII |
R or S |
Line name |
2-17 |
ASCII |
Free form |
Point number |
18-25 |
ASCII |
Free form |
Point index |
26-26 |
Integer |
1-9 |
Point code |
27-28 |
ASCII |
|
Static correction |
29-32 |
Integer |
-999 to +999 |
Point depth |
33-36 |
Floating point |
0 to 99.9 |
Seismic datum |
37-40 |
Integer |
-999 to + 9999 |
Uphole time |
41-42 |
Integer |
0 to 99 |
Water depth |
43-46 |
Floating point |
0 to 99.9 or 0 to 999 |
Easting |
47-55 |
Floating point |
None |
Northing |
56-65 |
Floating point |
None |
Elevation |
66-71 |
Floating point |
-999.9 to + 9999.9 |
Day of year |
72-74 |
Integer |
1 to 999 |
Time of day |
75-80 |
Integer |
0 to 235959 |
Step 3: Left justify each of the columns that will contain numeric values.
Step 4: Enter data values. In the case of a receiver SPS file there are five columns, which from column 1 to column 5 are labeled as Receiver Line, Receiver Location, Receiver Easting, Receiver Northing, and Receiver Elevation.
Step 5: Save the file as a space delimited text file. To save a space delimited text file go to the File menu and select Save As. Open the Save as type drop down menu in the Save As dialog and select Formatted Text (Space delimited). The default extension for Formatted Text files is *.prn.
Step 6: In Flowchart, select the appropriate auxillary data item (in this case SPS Receiver Locations) from the Auxilliary Data R-Z category in the Processing Catefories list and place the item on the SPW FlowChart.
Step 7: Locate the Formatted Text file created in Excel. To locate the file, double click on the card data icon in Flowchart and a Format File dialog will appear. Click on the Browse button and a Select File dialog will appear that allows you to maneuver through your directory structure and locate the file.
Step 8: Customize the file format so that SPW can properly read your text file. To customize the file, click on the Customize button in the Format File dialog, and a Customize Format dialog will appear. In the case of the receiver SPS file created in Excel, we will load five columns (Line, Location, Easting, Northing, and Elevation), each of which is 8 characters wide. The starting column for Line number is 1 and the length of the Line field is 8. The starting column for the Location number is 9 and the length of the Location field is 8 .. The starting column for the Elevation field is 33 and the length of the Elevation field is 8. When the appropriate parameters have been entered, select OK.
Step 9: View the card data spreadsheet to verify the data values.
Usage:
The CMP Flex Location card data item is used to store the location of flex binned location as computed by CMP Binning processing step.
Step Parameter Dialog:
Parameter descriptions:
File Browse Browse for file to store CMP flex locations
Append to existing dataset If checked, new flex locations will be added to existing file.
Scan file Select to scan existing file where data will be appended.
Current Records: Specify paramaters related with existing file in terms of Field File ID range, Trace ID range, Offset range, CMP Line numbers and CMP Location numbers.
Flex binning specification: Specify flex binning parameters related with existing file in terms of Inline % bin flex, Inline % offset flex, Crossline % bin flex and Crossline % offset flex.
Fold file output: Specify parameters related with fold file output.
Include flex traces If checked, include flex traces in output file.
Trace selection method: Specify parameters for trace selections.
All trace offsets If selected, all offsets are selected for flex binning.
Maximum traces per bin Enter the maximum number of traces per bin.
One trace per offset interval If selected, only one trace per offset is selected for flex binning.
Offset interval Enter the offset interval to be considered for flex binning.
Specify line range If checked, line range are defined manually.
CMP Lines Enter the CMP line range to be considered for the flex binning.
Specify locations range If checked, location range are defined manually.
CMP Locations Enter the CMP location range to be considered for the flex binning.
Fold file browse Select file to store fold information.
Make fold file Not yet implemented.
Usage:
The CMP Statics card data item is used to store CMP based static shift values in milliseconds.
Step Parameter Dialog:
CMP Statics card data file may be sorted in CMP Line, Source Line, Receiver Line or Offset.
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing CMP Statics file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
Bin location Enter the location of the bin.
ExtraOne Enter the value of the statics for the corresponding Bin Location at the current record as defined in Line-0.
Usage:
The Early Mutes card data item is used to store the mute definition for early (top) mutes. Mute times are in units of seconds. Early mutes may be interactively built in a seismic display using the Seismic Picker tool located in the seismic view at the lower right corner. Picks may be manually adjusted using the Early Mutes card data.
Step Parameter Dialog:
Early Mutes need two sort keys. Primary sort key may be CMP Line, Source Line, Receiver Line or Offset. Secondary sort key may be CMP Line, Source Line, Receiver Line.
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing Early Mute file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
Time (ms) Enter the two-way-traveltime for the pick at the current record for a given Offset.
Offset Enter the value of the offset of the pick.
Usage:
The Exclusion Zones card data item is used to define exclusion zones (i.e., exclusion polygons) to be used for example in map displays. Accepted formats are MESA, SPW and PIKESA.
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing Exclusion Zones file or to define the name of a new file to be saved.
Format Type Select format type. Available formats are MESA, SPW and PIKESA.
Navigate through record.
Source Easting Enter the Easting coordinates of each point of the exclusion polygon.
Source Northing Enter the Northing coordinates of each point of the exclusion polygon.
Usage:
The FK Mutes card data item is used to store the mute definition for mutes in the FK domain. Mute are defined in wavenumber (k) and velocity. FK mutes may be interactively built in a FK spectrum display using the Seismic Picker tool located in the seismic view at the lower right corner. Picks may be manually adjusted using the FK Mutes card data.
Step Parameter Dialog:
FK Mutes need two sort keys. Primary sort key may be CMP Line, Source Line, Receiver Line or Offset. Secondary sort key may be CMP Line, Source Line, Receiver Line.
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing FK Mutes file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
Wavenumber (k) Enter the value for the wavenumber of the pick.
Velocity Enter the value of the velocity of the pick.
Usage:
The Filed File Statics card data item is used to store static shifts for records corresponding to Field Files.
Step Parameter Dialog:
Field File Statics card data file may be sorted in CMP Line, Source Line, Receiver Line or Offset.
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing Filed File Statics file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
Bin location Enter the location of the bin.
ExtraOne Enter the value of the statics for the corresponding Bin Location at the current record as defined in Line-0.
Usage:
The First Break Time Picks card data item is used to store the first break time picks (in milliseconds). First break may be picked interactively in a seismic display using the Seismic Picker tool located in the lower left corner of the seismic display.
Step Parameter Dialog:
First break picks might be viewed in a table and edited manually:
First break picks might be plotted in offset versus TWT. This allows the screening of possible picking errors.
Parameter descriptions:
File Browse Select to browse for existing First Break Times file or to define the name of a new file to be saved.
Primary sort key Select the primary sort key to be used in the navigation from record to record.
Secondary sort key Select the secondary sort key to be used in the navigation from record to record.
Tertiary sort key Select the tertiary sort key to be used in the navigation from record to record.
Quaternary sort key Select the quaternary sort key to be used in the navigation from record to record.
Create record at Select the sort key used to create records.
Usage:
The Gain Curves card data item is used to store time-decibel gain pairs. A gain of 0 dB is equivalent to scalar multiplication by a factor of 1, a gain of 6 dB by a factor of 2, a gain of 12 dB by a factor of 4, a gain of 18 dB by a factor of 8, and so on. Time is in milliseconds.
Step Parameter Dialog:
Gain functions card data file may be sorted in CMP Line, Source Line, Receiver Line or Offset.
Example Card Data:
Parameter descriptions:
Format Type Select format type.
Navigate through record.
Bin location Enter the location of the bin.
ExtraOne Enter the value of the statics for the corresponding Bin Location at the current record as defined in Line-0.
Time (ms) Enter the start column and the number of columns allocated to write the two-way time (in milliseconds) associated with a given gain value in the output gain file.
ExtraOne Enter the start column and the number of columns allocated to write the gain in dB associated with a given two-way travel time in the output gain file.
Usage:
The Horizon File card data item is used to store horizon time picks. Horizon event picking may be performed interactively in a seismic display using the Seismic Picker tool located in the Picking menu.
Step Parameter Dialog:
Horizon File card data file may be sorted in CMP Line, Source Line, Receiver Line or Offset.
Example Card Data:
Parameter descriptions:
Usage:
The Line Definition File card data is used to (1) store the best fit line to the scatter of CMP resulting from a crooked line seismic survey, and (2) to specify, and ultimately extract a random 2-D line from a 3-D data volume
Step Parameter Dialog:
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing Line Definition File file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
Bin Easting Enter the start column and the number of columns allocated to write the easting associated with a given coordinate pair in the output line definition file.
Bin Northing Enter the start column and the number of columns allocated to write the northing associated with a given coordinate pair in the output line definition file.
Usage:
The Offset Gain Corrections auxiliary card data allows definint offset varying functions for gain correction.
Step Parameter Dialog:
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing Offset Gain Corrections file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
Usage:
The PP Nhmo Eta Function card data item is used to store time-eta pairs for the case of P-wave non-hyperbolic moveout, where Eta is a parameter that characterizes the anisotropy in transversely isotropic media. Once the short-spread P-wave stacking velocity function has been picked, corresponding Eta functions may be picked interactively in SeisViewer on Eta Semblance gathers. The PP Nhmo Eta Function card has the same structure as a Velocity Function card.
Step Parameter Dialog:
Primary sort key may be CMP Line, Source Line, Receiver Line or Offset. Secondary sort key may be CMP Line, Source Line, Receiver Line. Select outpu velocity type from RMS (Stacking) velocity, Interval velocity or Average Velocity. Velocity field may be defined in the Two-way time or Depth domain.
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing PP NHMO Eta Function file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
Time (ms) Enter the start column and the number of columns allocated to write the two-way travel time (in milliseconds) associated with a given velocity pick in the velocity file.
Attribute Enter the start column and the number of columns allocated to write the RMS or interval velocity value associated with a given velocity pick in the velocity file.
Usage:
The PP Nhmo Gamma Function card data item is used to store time-gamma pairs for the case of PS-wave (i.e. converted wave) non-hyperbolic moveout, where Gamma is the effective Vp/Vs ratio down to the event being analyzed. Once the short-spread P-wave stacking velocity function has been picked, corresponding Gamma functions may be picked interactively in SeisViewer on Gamma Semblance gathers. The PP Nhmo Gamma Function card has the same structure as a Velocity Function card.
Primary sort key may be CMP Line, Source Line, Receiver Line or Offset. Secondary sort key may be CMP Line, Source Line, Receiver Line.
Usage:
The Polygon Definition card data item is used to specify the coordinates of a polygon that will be used to select data from a seismic volume. The Polygon Definition File may be used to selectively input data in conjunction with the SPW Tape Utility or may be linked to the Select Traces processing step for the same purpose.
Step Parameter Dialog:
Polygon Definition need two sort keys. Primary sort key may be CMP Line, Source Line, Receiver Line or Offset. Secondary sort key may be CMP Line, Source Line, Receiver Line.
Example Card Data:
Parameter descriptions:
File Browse Select to browse for existing Polygon Definition file or to define the name of a new file to be saved.
Format Type Select format type.
Navigate through record.
X (first key value) Enter the start column and the number of columns allocated to write the X coordinate associated with a given coordinate pair in the output polygon definition file.
Y (second key value) Enter the start column and the number of columns allocated to write the Y coordinate associated with a given coordinate pair in the output polygon definition file.
Usage:
The Receiver Gains card data item is used to store surface consistent gains associated with receiver locations.
Step
Parameter Dialog:
Example Card Data:
Card Data Customization Parameter Dialog:
Parameter descriptions:
Number of comment records preceding data: Indicates the number of lines in the output file reserved for writing comment cards. These are the first lines in the file. A minimum of one line is required.
File Header field:
Number of lines Enter the start column and the number of columns allocated to write the number of receiver lines in the receiver gain file.
Sheet Header field:
Receiver line number Enter the start column and the number of columns allocated to write the receiver line number in the output receiver gain file.
Number of rows Enter the start column and the number of columns allocated to write the number of receiver positions per receiver line in the output receiver gain file.
Data header field:
Location number Enter the start column and the number of columns allocated to write the receiver location number in the receiver gain file.
Gain Enter the start column and the number of columns allocated to write the receiver gain in the receiver gain file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the receiver gains file.
Usage:
The Receiver Statics card data item is used to store receiver static information in units of milliseconds.
Step Parameter Dialog:
Example
Card Data:
Card Data Customization Parameter Dialog:
Parameter descriptions:
Number of comment records preceding data: Indicates the number of lines in the output file reserved for writing comment cards. These are the first lines in the file. A minimum of one line is required.
File Header field:
Number of lines Enter the start column and the number of columns allocated to write the number of receiver lines in the receiver statics file.
Sheet Header field:
Receiver line number Enter the start column and the number of columns allocated to write the receiver line number in the output receiver statics file.
Number of rows Enter the start column and the number of columns allocated to write the number of receiver positions per receiver line in the output receiver statics file.
Data header field:
Location number Enter the start column and the number of columns allocated to write the receiver location number in the receiver statics file.
Time Enter the start column and the number of columns allocated to write the receiver static (in milliseconds) in the receiver static file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the receiver statics file.
Usage:
The Observer Notes card data item is used to store the relational acquisition geometry information for sources and receivers. In the SPS lingo this is referred to as the Cross Reference file. An example seismic survey with the corresponding source, receiver, and observer SPS files is illustrated in the Geometry Definition step (p. 243).
Step
Parameter Dialog:
Example Card Data:
Card
Data Customization Parameter Dialog:
Parameter descriptions:
Load If checked, indicates the existence of the entity in the file.
Tape Enter the start column and the number of columns allocated to write the tape number (disk or physical) associated with a given record in the Cross Reference SPS file.
Field file Enter the start column and the number of columns allocated to write the field file number associated with a given record in the Cross Reference SPS file.
Field file incr. Enter the start column and the number of columns allocated to write the increment between field files in the Cross Reference SPS file.
Source line Enter the start column and the number of columns allocated to write the source line number associated with a given record in the Cross Reference SPS file.
Source location Enter the start column and the number of columns allocated to write the source location number associated with a given record in the Cross Reference SPS file.
First channel Enter the start column and the number of columns allocated to write the first channel associated with a given record in the Cross Reference SPS file.
Last channel Enter the start column and the number of columns allocated to write the last channel associated with a given record in the Cross Reference SPS file.
Channel incr Enter the start column and the number of columns allocated to write the increment between channels associated with a given record in the Cross Reference SPS file.
Receiver line Enter the start column and the number of columns allocated to write the receiver line number associated with a given record in the Cross Reference SPS file.
First receiver Enter the start column and the number of columns allocated to write the first receiver associated with a given record in the Cross Reference SPS file.
Last receiver Enter the start column and the number of columns allocated to write the last receiver associated with a given record in the Cross Reference SPS file.
Receiver incr Enter the start column and the number of columns allocated to write the increment between receivers associated with a given record in the Cross Reference SPS file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the SPS Observer Notes file.
Usage:
The Receiver Locations SPS Format card data item is used to store positional receiver location information. An example seismic survey with the corresponding source, receiver, and observer SPS files is illustrated in the Geometry Definition step (p. 243).
Step Parameter Dialog:
Example Card Data:
Card Data Customization Parameter Dialog:
Parameter descriptions:
Load If checked, indicates the existence of the entity in the file.
Line Enter the start column and the number of columns allocated to write the receiver line associated with a given record in the Receiver SPS file.
Location Enter the start column and the number of columns allocated to write the receiver location associated with a given record in the Receiver SPS file.
Latitude Enter the start column and the number of columns allocated to write the receiver latitude associated with a given record in the Receiver SPS file.
Longitude Enter the start column and the number of columns allocated to write the receiver longitude associated with a given record in the Receiver SPS file.
Easting Enter the start column and the number of columns allocated to write the receiver easting associated with a given record in the Receiver SPS file.
Northing Enter the start column and the number of columns allocated to write the receiver northing associated with a given record in the Receiver SPS file.
Elevation Enter the start column and the number of columns allocated to write the receiver elevation associated with a given record in the Receiver SPS file.
Static Enter the start column and the number of columns allocated to write the receiver static associated with a given record in the Receiver SPS file.
Depth Enter the start column and the number of columns allocated to write the receiver depth associated with a given record in the Receiver SPS file.
Datum Enter the start column and the number of columns allocated to write the elevation of the datum at a receiver station associated with a given record in the Receiver SPS file.
Uphole Enter the start column and the number of columns allocated to write the interpolated uphole time (ms) at a receiver station associated with a given record in the Receiver SPS file.
Water depth Enter the start column and the number of columns allocated to write the water depth at a receiver station associated with a given record in the Receiver SPS file.
Date Enter the start column and the number of columns allocated to write the Julian day on which the receiver station was initially deployed in the Receiver SPS file.
Time Enter the start column and the number of columns allocated to write the time of day on which the receiver station was initially deployed in the Receiver SPS file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the SPS receiver file.
Usage:
The Source Locations SPW Format card data item is used to source location geometry information. An example seismic survey with the corresponding source, receiver, and observer SPS files is illustrated in the Geometry Definition step (p. 243).
Step Parameter Dialog:
Example Card Data:
Card
Data Customization Parameter Dialog:
Parameter descriptions:
Load If checked, indicates the existence of the entity in the file.
Line Enter the start column and the number of columns allocated to write the source line associated with a given record in the Source SPS file.
Location Enter the start column and the number of columns allocated to write the source location associated with a given record in the Source SPS file.
Latitude Enter the start column and the number of columns allocated to write the source latitude associated with a given record in the Source SPS file.
Longitude Enter the start column and the number of columns allocated to write the source longitude associated with a given record in the Source SPS file.
Easting Enter the start column and the number of columns allocated to write the source easting associated with a given record in the Source SPS file.
Northing Enter the start column and the number of columns allocated to write the source northing associated with a given record in the Source SPS file.
Elevation Enter the start column and the number of columns allocated to write the source elevation associated with a given record in the Source SPS file.
Static Enter the start column and the number of columns allocated to write the source static associated with a given record in the Source SPS file.
Depth Enter the start column and the number of columns allocated to write the source depth associated with a given record in the Source SPS file.
Datum Enter the start column and the number of columns allocated to write the elevation of the datum at the source station associated with a given record in the Source SPS file.
Uphole Enter the start column and the number of columns allocated to write the uphole time (ms) at a source station associated with a given record in the Source SPS file.
Water depth Enter the start column and the number of columns allocated to write the water depth at a source station associated with a given record in the Source SPS file.
Date Enter the start column and the number of columns allocated to write the Julian day on which the source station was occupied in the Source SPS file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the SPS source file.
Usage:
The Source Gains card data item is used to store gains associated with source locations.
Step Parameter Dialog:
Example Card Data:
Card Data Customization Parameter Dialog:
Parameter descriptions:
Number of comment records preceding data: Indicates the number of lines in the output file reserved for writing comment cards. These are the first lines in the file. A minimum of one line is required.
File Header field:
Number of lines Enter the start column and the number of columns allocated to write the number of source gain pairs in the source gain file.
Sheet Header field:
Source line number Enter the start column and the number of columns allocated to write source line number in the output source gain file.
Number of rows Enter the start column and the number of columns allocated to write the number of source positions per source line in the output source gain file.
Data header field:
Location number Enter the start column and the number of columns allocated to write the source location number in the source gain file.
Gain Enter the start column and the number of columns allocated to write the source gain in the source gain file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the source gains file.
Usage:
The Source Statics card data item is used to store source statics information in units of milliseconds.
Step Parameter Dialog:
Example
Card Data:
Card
Data Customization Parameter Dialog:
Parameter descriptions:
Number of comment records preceding data: Indicates the number of lines in the output file reserved for writing comment cards. These are the first lines in the file. A minimum of one line is required.
File Header field:
Number of lines Enter the start column and the number of columns allocated to write the number of source lines in the source statics file.
Sheet Header field:
Receiver line number Enter the start column and the number of columns allocated to write source line number in the output source statics file.
Number of rows Enter the start column and the number of columns allocated to write the number of source positions per source line in the output source statics file.
Data header field:
Location number Enter the start column and the number of columns allocated to write the source location number in the source statics file.
Time Enter the start column and the number of columns allocated to write the source static (in milliseconds) in the source static file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the source statics file.
Usage:
The Surgical Mutes card data item is used to store surgical mute data. Mute times are in units of seconds. Surgical mutes may be defined interactively in SeisViewer using the Pick Traces tool located in the Picking menu.
Step Parameter Dialog:
Example Card Data:
Card Data Customization Parameter Dialog:
Parameter descriptions:
Number of comment records preceding data: Indicates the number of lines in the output file reserved for writing comment cards. These are the first lines in the file. A minimum of one line is required.
File Header field:
Number of mute locations Enter the start column and the number of columns allocated to write the number of mute locations in the output mute file.
Sheet Header field:
CMP line number Enter the start column and the number of columns allocated to write CMP line number in the output mute file.
CMP location number Enter the start column and the number of columns allocated to write CMP location number in the output mute file.
Number of rows Enter the start column and the number of columns allocated to write the number of CMP positions in the CMP line in the output mute file.
Sort Enter the start column and the number of columns allocated to write the sort order (e.g. common source, CMP, etc ) of the data file on which the early mute was picked.
Data header field:
Time Enter the start column and the number of columns allocated to write the mute time (in seconds) at a specified offset and trace number in the output mute file.
Offset Enter the start column and the number of columns allocated to write the source receiver offset corresponding to a specified mute time and trace number in the output mute file.
Unique trace number Enter the start column and the number of columns allocated to write the unique trace number corresponding to a specified mute time and source-receiver offset in the output mute file.
Pick order index Enter the start column and the number of columns allocated to write the pick index corresponding to a specified mute time, source-receiver offset, and unique trace number in the output mute file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the surgical mute file.
Usage:
The Tail Mutes card data item is used to store tail or end mute data. Mute times are in units of seconds. Tail mutes may be interactively defined in SeisViewer using the Pick Traces tool located in the Picking menu.
Step
Parameter Dialog:
Example Card Data:
Card Data Customization Parameter Dialog:
Parameter descriptions:
Number of comment records preceding data: Indicates the number of lines in the output file reserved for writing comment cards. These are the first lines in the file. A minimum of one line is required.
File Header field:
Number of mute locations Enter the start column and the number of columns allocated to write the number of mute locations in the output mute file.
Sheet Header field:
CMP line number Enter the start column and the number of columns allocated to write CMP line number in the output mute file.
CMP location number Enter the start column and the number of columns allocated to write CMP location number in the output mute file.
Number of rows Enter the start column and the number of columns allocated to write the number of CMP positions in the CMP line in the output mute file.
Sort Enter the start column and the number of columns allocated to write the sort order (e.g. common source, CMP, etc ) of the data file on which the early mute was picked.
Data header field:
Time Enter the start column and the number of columns allocated to write the mute time (in seconds) at a specified offset and trace number in the output mute file.
Offset Enter the start column and the number of columns allocated to write the source receiver offset corresponding to a specified mute time and trace number in the output mute file.
Unique trace number Enter the start column and the number of columns allocated to write the unique trace number corresponding to a specified mute time and source-receiver offset in the output mute file.
Enter the length of each record in the file in bytes Enter the length in bytes of one line of the tail mute file.
Usage:
The Velocity Function card data item is used to store time-velocity pairs. Stacking velocities may be picked interactively in SeisViewer using the Pick Traces tool located in the Picking menu..
Step Parameter Dialog:
Example Card Data:
Card Data Customization Parameter Dialog:
Parameter descriptions:
Number of comment records preceding data: Indicates the number of lines in the output file reserved for writing comment cards. These are the first lines in the file. A minimum of one line is required.
File Header field:
Number of velocity locations Enter the start column and the number of columns allocated to write the number of velocity locations in the velocity file.
Sheet header field:
CMP line number Enter the start column and the number of columns allocated to write the CMP line number associated with a velocity function in the velocity file.
CMP location number Enter the start column and the number of columns allocated to write the CMP location number associated with a velocity function in the velocity file