seisee说明书

SeiSee (2.22)[1]User’s Manual ContentsContentsIntroductionStarting the programUsing the programOpen SEG-Y (SU) or CST fileOpen Directory Browser panelOpen file in Recovery mode (SEG-Y only) Selection of traces to be displayedTrace selection by trace number or header item value Trace selection by expressionTrace SortingSaving data to SEG-Y or CWP/SU fileSave trace(s) sample and header values to text file Export trace headers values to the text fileImport trace header values from text fileToggling “Apply Delay Recording Time” mode Display mode selection.“Display mode” and “Wiggle Fill” panels “Colors” panelColor mode palette setupScaling and gain setupScale panelDirection panelChange scale and gain by mouse wheelDirection panelZoom buttons.Default Seismic View ParametersSeismic windowAxes labeling setupScrolling the seismic imageTrace selectionDisplay, edit headers and dataTrace Headers windowHeader Items browsingCustom header items creationТrace SearchingTrace header editingSingle trace header item modificationTrace headers changing by expressionHardcopy windowПечать изображенияЭкспорт изображения сейсмики в формате Windows Bitmap (.bmp) ProcessingProcessing parameters setupProcessing panelBand pass filterAutomatic gain control (AGC)InversionPower Spectrum windowAppendicesExpressionsSpecial variables and header item value functionExpression SyntaxExprEval Internal Functions (by Brian A. Vanderburg II)ExprEval Internal ConstantsApplication Internal FunctionsApplication Internal ConstantsApplication Internal VariablesTrace value, gain and view on screenSimplified SEG-Y file structureSU/CWP filesIntroductionSeiSee program shows seismic data in SEG-Y, CWP/SU, CGG CST formats on screen of your personal computer (Windows-2000, XP, Vista Windows-7, 8, Linux+Wine). Program features:-standard integer (2,4 bytes) and IBM float (4 bytes) sample formats support-nonstandard integer(1 byte), float IEEE (4 bytes) sample formats[2]-CGG Geovecteur disk SEG-Y format (.dat)-various seismic display modes (wiggle, variable area, variable density, color)-import-export color palettes to text file-scaling seismic image, gain control, axes labeling setup-plot seismic to printer (plotter)-image export in Windows Bitmap (.bmp) and PostScript formats.-SEG-Y trace headers display (formats Integer*1,*2,*4, IEEE Float*4,*8, IBM Float*4 are supported)-search trace by header item value-data samples browsing-text header and binary editor-band pass filter, automatic gain control (AGC)-headers consistency check-write whole SEG-Y file or part of it to disk in SEG-Y (IBM-32/IEEE) or CWP/SU format with ability to select data on base of trace index or trace header value or trace header expression and given time interval; reversal trace order is also supported. Processing parameters can be applied to recorded data (filter, AGC etc).-export trace(s) sample and header values to text file-import trace headers values from text file-trace shift according with “Delay Recording Time” trace header value-selection of traces to be displayed by trace index or header value and by expression-trace headers change by means expressions-trace sorting-open and fix files containing wrong data in binary header (Recovery Mode)-single trace header item editing-disc directory browsing-power spectrum calculation and displayStarting the programDouble click program icon by mouse:Main window will be shownUse button to toggle controls panel visibility, and for directory browser. Command line startup mode is also supported. Use first parameter to specify a SEG-Y file name. Using the programOpen SEG-Y (SU) or CST fileSelect menu “File” ® “Open”, or press button:.Standard “Open” dialog appears. Use it for to select file that you want to browseSelect menu “File” ® “Reopen” to open one of previously opened files. Open Directory Browser panelSelect “File” ® “Open Directory” menu. Standard “Open” dialog appears. Use it for directory selection, then select any file in it and press “Open” button.The Browser panel will be shown:(Only “valid” SEG-Y, CWP/SU and CST files will be listed)To display SEG-Y file just select it in the list by mouse.The panel buttons:- Return to the previous directory- Refresh directory list- Open directory selection dialogOpen file in Recovery mode (SEG-Y only)If file has wrong values in “Sample Interval”, “Number samples per data trace for reel” или “Data Sample Code” items of the binary header, the program opens file in Recovery Mode. Only textand binary header will be read. It is necessary to fix the values and reopen the file again.Selection of traces to be displayedTo change the parameters choose “File” ® “Trace Selection” menu, or press button.Choose “By Number” tab, then fill in selection parameters form and press “Select” button, after this the program will start trace selection. When it is done, press “OK” button to display selecteddata or “Cancel button” to discard the selection.Trace selection by expressionSelect “By Expression” tab, then enter expression text, and press “Select” button, after this the program will start trace selection. Expression syntax is described in the “Expressions” appendix. When it is done, press “OK” button to display selected data or “Cancel button” to discard theselection.Trace SortingTo setup sorting select menu “File” ® “Trace Sort”, or press button.The dialog has two lists. “Selected Headers” list contains trace header item names that will be used for sorting, and “Available Headers” list holds all trace headers.Header order in the “Selected Headers” list corresponds precedence of using them in sorting. Назначения элементов управления здесь следующее:Control DescriptionAdd selected header item from "Available Headers" to "Selected Headers"listRemove selected header item from "Selected Headers" listClear "Selected Headers" listMove selected header item in "Selected Headers" UpMove selected header item in "Selected Headers" DownTo select sort mode check suitable item in “Sort Mode” panelControl DescriptionNo No sortingAscending Ascending sortingDescending Descending sortingTo apply selected mode, press “Sort” button, and then press “OK”When sorting is active the “Sort” mark is shown in status bar:Saving data to SEG-Y or CWP/SU fileTo save file select “File” ® “Save As ” menu item or press button.It is possible to save all trace or part of them. Fill selection parameters in the dialog. Selection parameters are the same as described in “Selection of traces to be displayed” chapter.Check “Reversal order” checkbox to save traces in reversal order. Check “Apply Processing” to save data with processing applied.Then press “Save” button. When standard “File Save” dialog appears, use it to specify output file. “Close” button discards dialog.Then press “Save” button. When standard “File Save” dialog appears, use it to specify type andname of output file. “Close” button discards dialog.The following data formats are supportedüSEG-Y – IBM-FLOAT-32 samplesüSEG-Y – IEEE-FLOAT-32 samplesüCWP/SUSave trace(s) sample and header values to text fileProcedure is same as for Saving SEG-Y file, except you need to set “Трасе Samples Text File” file type.To save trace header values together with trace data check “Include Headers (txt)” checkbox.Export trace headers values to the text fileTo export select the following menu items:“File” ® “Export Trace Headers to ASCII file”Check “Write Column info” if column information is needed.Press “Save” to start export. Header values that are selected in the “Trace Headers” window will be exported to output file.Here is structure of the output file:P 0 F 0 Trace index in fileP 9 F 4 * FFID - Original field record numberP 17 F 4 SP - Energy source point number P 21 F 4 CDP ensemble number P237 F14 New Item 1EXPR SP from CDP = +----------+----------+----------+----------+----------+---------- 1 858 1100 1519 0.25 860 2 858 1100 1520 0.5 860.5 3 858 1100 1521 0.75 861 4 858 1100 1522 1 861.5 5 858 1100 1523 1.25 862 6 858 1100 1524 1.5 862.5At the beginning of the file column information will be recorded (if “Write Column Info” is checked):Position Contents Description 1 - 4Pnnn or EXPR nnn – number that shows byte position of header item if value is expression 5space 6 - 8Fnn or three spaces nn – number for the appropriate format if value is expression 9space 10 -text header item descriptionThe next line is column info terminator – line that starts with “+” character.Header item values will be placed after this lineFirst column contains ordinal number of the trace (as it is in file, starting from 1). The following columns contain header values.Import trace header values from text fileFile to be imported should be in the same format as exported file.To import header values from file select the following menu:“File” ®“Import Trace Headers from ASCII file”Press “Load” to start import.Select input file and press “Open”Toggling “Apply Delay Recording Time” modeSometimes time of first trace sample is defined by “Delay Recording Time” trace header value. It is necessary to switch-on “Apply Recording Delay Header” to display seismic line with such traces properly. While working in this mode you can note some file opening delay, especially if file size if big. If you are sure that traces in current file are not shifted than you can toggle this mode off.To toggle the mode select “File” ® “Apply Recording Delay Header” menu item or set check to .Display mode selection.“Display mode” and “Wiggle Fill” panelsThe modes and corresponding controls’ positions are shown in the following tableMode Controls position Seismic sample1Wiggle2Wiggle + Positive Fill(Variable area)3Wiggle + Negative Fill4Variable density (Gray levels)5Color6Color + WiggleDisplay Mode panel controls Description Wiggle Wiggle mode Gray Variable density mode Color Color mode Wiggle Fill panel controls Description None No wiggle fill Positive Positive fill Negative Negative fill“Colors” panel Use this panel to select colors:Colors panel controls Description Wiggle Wiggle color Fill Fill color Selected Selected trace colorColor mode palette setupPress button to popup “Palette” dialog.The following buttons use to control the palette list: Button DescriptionCreate new paletteDuplicate current paletteRemove current paletteCheck all palettes for exportUncheck allExport selected palettes to fileImport palettes from fileBefore export to file check required palettes in the list:When palette is selected in the list, it is applied to the seismic window.Before editing select needed palette in the list.The palette consists of color markers; space between two markers is filled by linear interpolation of color.Originally the palette is made of three markers:#Marker Description1-100%Maximal negative amplitude value20%Zero amplitude level3+100%Maximal positive amplitude valueTo select a marker pick it by mouse in the “Markers/Levels” panel.To choose new color for a marker, use panel of colors in the right part of the dialog. Selected color will be shown “Selected Color” field. To assign the color to the selected marker, press “Assign Color” button.To add a new marker, press “Add Marker” button. New marker will be added between selected and previous markers.To remove selected marker, press “Delete Marker” button.Marker position can be changed by moving marker position control by mouse.To save current changes, press “Update” button, and to cancel the changes press “Reset”. Scaling and gain setupScale panelScale panel controls DescriptionTraces Set trace number per centimeterFit seismic section to window horizontally Time Set time scale (cm/sec)Fit seismic section to window verticallyGain-w Wiggle Gain controlAutomatically adjust current wiggle gain, usingmaximal amplitude values of selected trace (see“Trace Selection article”)Gain-сColor Gain controlAutomatically adjust color mode gain=Check this if you need same gain value for bothmodesTo adjust a value by mouse, move mouse cursor to the corresponding slider (), then press left mouse button, and (keeping it pressed) move the slider. Current value of the parameter will be shown in edit control that is on the right of the slider, and seismic image will be repainted to reflect the changes.Direction panelDirection panel control DescriptionNormal From left to rightReversed From right to left Change scale and gain by mouse wheelMouse Position during Wheel rotating ActionIn the Traces input filed, In the Time Axis Change horizontal scaleIn the Time input field, In the Headers Axis Change vertical scaleIn the Seismic Section window Zoom-In/Zoom-out in both directions It the Gain-w input field Change Wiggle mode gainIn the Gain-с input field Change Color mode gain Direction panel.Control DescriptionNormal From left to right Reversed From right to leftZoom buttons.Button DescriptionFit all the image to seismic window sizeZoom by window. Press this button then draw a rectangle on the seismicwindow (move mouse cursor to first corner of the rectangle, press left mousebutton, and keeping it pressed, move mouse to set desired size). Selected regionwill be zoomed to size of the seismic window.Return to previous zoomZoom in (1.5 times)Zoom out (1.5 times)Direction of scale changing caused by , , buttons depends on the following radio-buttons selection:Button DescriptionScale changes in both directionsScale changes in horizontal directionScale changes in vertical directionDefault Seismic View ParametersSelect menu “View” ® “Set Seismic View Defaults” to set defaults for seismic sectionSelect “View” ® “Set Velocity View Defaults” to set defaults for velocity section (in SEG-Y format)Seismic windowTo show this window select “Seismic” tab.When you move mouse pointer in the seismic window, values corresponding current position will be shown in status bar at the bottom of the main window and in “Mouse Position Header Box”Trc Trace number in the fileTime Time (ms)Smp Sample value (processing is applied!)Axes labeling setupPress button, to popup Axes dialog.The dialog has two tabs. To select headers that should be shown on the top of seismic, click “Trace Axis (Headers)” tab.There are two lists on this tab: "Selected Headers" list contains descriptions of trace header items that will be shown above seismic section, and "Available Headers" list contains all the SEG-Y trace header items.Item order in "Selected Headers" corresponds to its position on axis (higher or lower) Controls on "Trace Axis" tab:Control DescriptionAdd selected header item from "Available Headers" to "Selected Headers"listRemove selected header item from "Selected Headers" listClear "Selected Headers" listMove selected header item in "Selected Headers" UpMove selected header item in "Selected Headers" DownFor each item in "Selected Headers" you can specify start value and step. For example: Select "CDP ensemble number” item, assign start value=10 and step=10 to it. In this case traces with CDP numbers = 10, 110, 210, etc will be labeled.To setup time axis labeling step click “Time Axis” tab.Enter the step value. If time lines are needed set mark in the “Timelines” checkbox.To accept the changes press “Apply” or “OK” button. “OK” also closes the dialog. “Close” button discards any changes and closes the dialog.Scrolling the seismic imageThere are two ways to scroll the image:-using scroll bars-dragging by mouseMove mouse cursor to start point, then press RIGHT mouse button and keeping it pressed, move the image into desired direction.Trace selectionTo switch into selection mode press button. It is the same button that is used to switch into “Pan” mode. Image on button, depict mode that will be selected after the button press. While selection mode is chosen, move mouse cursor to desired trace and press left mouse button. As result, this trace becomes “selected”.Trace header values of the selected trace will be shown in “Bin header” panel (see “Display headers” article).This trace is also used for automatic gain control.To move trace selection some number traces forward or backward use the following controls:Fill edit control with move step valuePress button to move forward, and to move backwardDisplay, edit headers and dataAfter button is pressed, “Info/Headers” panel will be shown in the left part of the seismic window:Contents of the panel depend on which radio-button is checked.Button ContentsGeneral General file informationTrace header Header of the selected traceBin header Binary header of SEG-Y fileText header Text header of SEG-Y fileTrace data Trace data sample valuesSpectrum Power spectrum graphTo change the panel size, move mouse cursor to the right boundary. And when the mouse cursor is changed into , press left mouse button, and holding it pressed move panel boundary into desired direction.Trace header items browsingSelect “Trace Header” tab to show contents of the selected trace header:Besides browsing of known header items (“Items” tab), it is also possible to display trace header as dump of integer values array for nonstandard data analysis (“Dump” tab).SEG-Y file text header editing[3]Select “Text Header” tab to show contents of the text header.Select appropriate line of the header by mouse then enter changes from keyboard.To save the changes press “Update” button, or press “Reset” button to undo all the changes[4]. It is also possible to load text header data from text (ASCII) file. To do this press “From file” button or select menu “File” ® “Load Text Header from File”. To load the data from the previous file, press small button that is on the right of the “From file” button.To save the header into text (ASCII) file select “File” ® “Save Text Header to File” menu item. It is also possible to load text header data from text (ASCII) file. To do this press “From file” button or select menu “File” ® “Load Text Header from File”. To load the data from the previous file, press small button that is on the right of the “From file” button.To save the header into text (ASCII) file select “File” ® “Save Text Header to File” menu item.SEG-Y file binary header editing[5]Select “Bin Header” tab to show contents of the text header.Select appropriate line of the header by mouse then enter changes from keyboard. “Sample Interval”, “Number samples per data trace for reel” and “Data Sample Code” items cannot be changed because they affect to file integrity. If you need nevertheless to edit these items, then check “Allow to edit all items” box.Modified lines are highlighted by blue color. Bad values are marked by red.Program will not update file till all the bad values are corrected.To save the changes press “Update” button, or press “Reset” button to undo all the changes[6].Trace Headers windowHeader Items browsingTo show this window select “Trace Headers” and “View” tabs.Check items in Selection panel that you want to display. Values of selected header items will be shown in Data panel.Pressing to button selects all the items, and clears all selection.The program checks for trace headers consistence. If current trace header value difference with previous trace header is not equal difference with next trace, this value is highlighted by red color.Custom header items creationThe program allows create custom header item description. Use control panel buttons for this.The button creates a new header and shows editing dialog windowThe button shows editing dialog window for current header itemThe button removes the current itemNote: you can edit only custom header items.There are two types of items:•positional: 16 or 32-bit integer, from arbitrary header position •computable: its value is calculated by mathematical expressionIn case of positional item we have the following dialog:Fields:Name Item name: it should be unique, it will be used for header axis labeling in seismic window and for table column labeling in the trace header windowDescription Header item descriptionPosition Byte position (from 1) for this item in trace headerFormat Select needed format from combo box: Integer*1,*2,*4,IEEE Float*4,*8, IBM Float*4You can copy position and format from existing item to “Position” и “Format” fields. To do this, select item in “Available Headers” list and press button.To create a computable item select “Expression” tabEnter an expression that consists from numbers, parenthesizes, operators (+-/*) and special variablesExamples:Expression DescriptionN- current trace number in the fileN*2- same multiplied by 22- just value 2H(21,4)*2- integer*4 from position 21 of trace header (CDP) multiplied by2Тrace SearchingGo to end or beginning of the file• - go to the first trace• - go to the last traceGo to the trace with given indexTo activate this mode click left mouse button over “Trace #” table headerFill in search number (N)Select search condition from the list:•= go to trace index of which is equal of the search number •+ go N traces forward•- go N trace backwardTrace search by header item valueTo activate this mode click left mouse button over needed header item name (like “CDP”)Fill in search number (N)Select search condition from the list:•= find trace where selected header item value is equal N•+ find trace where selected header item value is equal current value + N•- find trace where selected header item value is equal current value - N•≠ find trace where selected header item value is not equal NPress one of the following buttons:• - sequential search forward• - sequential search backward•• - fast binary search[7], it works only on ordered sequence of values (ascended or descended) (≠ is not supported)If file size is big, then search may take sufficient amount of time.Press button to terminate current search.Trace header editingSingle trace header item modificationMove mouse pointer to table cell with header item value that you are going to change and press left mouse button.Name and value of selected item will be shown on screenFill in edit field by new item valueand press Update buttonTrace headers changing by expressionHeaders of selected traces (See: “Selection of traces to be displayed” article) can be changed by means mathematical expressions.To activate modification window select “Trace Headers” and “Change” tabs.Check header to be changed in the selection panel, then in data panel click table header corresponding to it in the data panel:Then fill in “Expression” field with expression text.The following variables have a special meaning:Variable DescriptionN Ordinal trace number in SEG-Y fileL Last trace number in SEG-Y fileFunction that returns arbitrary trace header item value is also defined:Н(p,f), where p – item position in the header, f – format (2-integer*2, 4-integer*4)For example: H(21,4) returns CDP number.Toolbar buttons:Inserts value of item currently selected in the selection panelInserts current trace number in the expressionInsert last trace numberClears expression fieldUpdate file with new valuesUndo the latest file modificationRepeat all above for each item you want to change and then press button.The following dialog will be shown:Press “Update” to change file or “Close” to cancel changes. Hardcopy windowTo show this window select “Hardcopy” tab.Печать изображенияTo print seismic image select “Print” tab.Press “Setup” button to choose printer and page size. Standard “Print setup” dialog will be shown. Use it to setup your parameters. Information about selected printer will be shown in “Printer Info” panel.To select orientation of plot use “Horizontal” and “Vertical” radio-buttons.It is possible only part of seismic section, for that you need to fill in Print Region form: Tmin Minimal Time (ms)Tmax Maximal Time (ms)From tr.Start from this traceТо tr.Stop at this traceUse “min” and “max” buttons to set minimal or maximal possible values.Press “All” button to print (export) whole section, and “View” button to print Seismic View image.To place text label (one string) from “Label” edit control to printout set mark intocheckbox. “File name” button puts current file name into edit control, and “Clear” button empties the control.If image size is bigger then page size then it will be spitted into several parts.Print preview panel shows as image is divided into pages. If you changed display mode, scaling, etc, then current changes also will be reflected in the preview panel.To print the image, press “Print” button. The button label changes to “Abort Print”. Printing progress will be shown in progress bar at the bottom of the window..To cancel printing, press “Abort Print” button.While printing other work with the program is not allowed.Экспорт изображения сейсмики в формате Windows Bitmap (.bmp) Select “Export” tab in “Hardcopy” windowFill “Bitmap Dpi” field with "dot per inch" value for your bitmap imageIn “Color Mode” select image type: 256-color (color 8-bit) or black and white (b/w -1 bit). Then press “Export” button. When standard “File Save” dialog appears, use it to specify output file. “Close” button discards dialog.ProcessingProcessing is applied to trace before it will be shown on screen. Here is the processing modules list:-band pass filter-automatic gain control (AGC)-data inversion (negation)Processing parameters setupTo set the processing parameters press button or select “Processing” ® “Parameters” menu item, after that “Processing” dialog appears. Enter parameters needed. To accept the parameters press “Apply” or “OK” button. “OK” also closes the dialog. “Close” button discards any changes and closes the dialog.Processing panel.Use the panel to toggle corresponding processing.Processing panel item DescriptionInversion Data inversion (Negation)Filter Band pass filterAgc or Norm Automatic gain control or Normalization Weight Use Trace Weighting Factor trace header itemOpen “Processing” dialogBand pass filterEnter filter cut frequencies as it is shown in the picture and check “Use filter”, if you want to use the filter.Original data Filtered dataAutomatic gain control (AGC)In “Use Normalization” mode maximum amplitude value is calculated for trace and each sample is divided to its value.In “Use AGC” mode “Window length” parameter sets AGC window length. AGC module moves the window down the trace sample-by-sample and calculates a scale factor at each location. The scale factor is equal to the RMS amplitude in the window.。