Text (Revised 22.10.2012)
Contents
1. Merge cumes ay EREN 7 14 21 28 35 SP 70 ID pick Time curves count 6 X 11 09 m T 74 ms 21 Easy Refraction File Wiew Time Curves Refraction surfaces Inversion Help A ty Z a L a 1 1 a s jr ee ee i eS al semi es ae A RE ea R a Oe eae Time me ba on 0 a _ Time curves count 7 X 2 70 m T 28 ms Identifying travel time curve fragments related to different layers We need to mark travel time curve fragments related to particular layers Let us do this using the interactive marker Select the Time Curves Marker 1 menu item or press 1 on the keyboard You will see a pink circle of the marker of the fist layer You can change its diameter by rotating the mouse wheel while keeping Shift key pressed Press and hold the left mouse button to mark the travel time curve sections related to the first layer The interpreter selects travel time curve breakpoints and determines the number of layers in the section interpretation model according to the principles described in the literature Linear approximation as well as output of resulting velocity values per travel time curve is done automatically Se ee E S T a File View Iime Curves Refraction surfaces Inversion Help B3 in EN 4 aano 3 F 23 Distance m pick_symmetric z 5 710 vV pick 5 7 11 pick 5 723 pick lt ss ral Q Time ms Distance m Depth m 3 100 Time2. Now we can add Near Surface Geometry Input module to the flow The module is dedicated to assigning geometry to seismic data acquired using different techniques typical for near surface applications including conventional refraction acquisition scheme When the module is added to the flow you will see its parameter dialog as shown below For assigning geometry to seismic refraction data select the Refraction tab of the dialog 11 Near Surface Geometry Input Reflection MASW Refraction Receivers __ a_ First Reciever Position Number Of Channels be Redever Step Sireamer Sources Const Step First Source Position C Variable Step source Step Offset Sources Number of P Number of r Forward Sources Reverse Sources Const Step 1 1 li Variable Step J 2 3 5 Reassign FFID and CHAN trace headers Our sample data was acquired according to the following scheme our receiver streamer contained 48 geophones equally spaced every 1 meter Shots on the streamer were made on channels 1 12 24 36 and 48 0 11 23 35 47 m accordingly Offset shots we made 24 meters ahead of the 1 channel and 23 meters behind the last channel In case of refraction data the module will calculate and assign shot point coordianates SOU_X receiver coordinates REC_X and source receiver offsets OFFSET based on shot point numbers FFID and channel numbers CHAN For correct geometry assignment we will
3. 4 A 93 01226 dT 184 5149 RMS Error 84 04056 maximum deviation pk 0 124 3048 The module allows building composite travel time curves time curves of waves from each refraction boundary This procedure is necessary to obtain a travel time curve covering the dead zone the direct wave tracking area on the direct and opposite travel time curves The head wave travel time curve can be extended into the dead zone using catching up travel time curves direct and opposite The procedure is accessed through the Inversion Composite travel time curves menu item When building a composite travel time curve the program takes into account the times of all travel time curves related to the second layer For example when a composite direct travel time curve is built only the catching up travel time curve will be taken into account in the left part then the average time between the catching up and direct travel time curve will be accounted for and finally the average time between all three travel time curves will be factored in All used travel time curves will be raised or lowered by the time corresponding to the travel time curve located within the array closest to its beginning A composite opposite travel time curve is built in a similar manner The result is shown below 25 Easy Refraction File View TimeCurves Refraction surfaces Inversion Help jjm X A a 2 QQhO gt P23 a Distance m
4. GEOPHYSICAL software company Refraction Seismic Survey Data Processing in RadExPro Using the Easy Refraction Module Practical Guide Revised October 22 2012 DECO Geophysical SC OOO Moscow State University Science Park 1 77 Leninskie Gory Moscow 119992 Russia Tel Fax 7 495 930 94 14 E mail support radexpro ru Website www radexpro com Contents COMENT scare E E E tame onto acca assees sue ccanseccusete res 2 PVT CUO eere E ena tase cts vag ciseaiouaano cutioacad ose neenetss S 2 croot SO Ol Ee E ch seiedieuctsacturtons utemundeorasesmunieunueeeeanners 2 Data loading and geometry ASSIENMENL cccsecccseccsseccescccsncccesceeeeceeneeceneeeeeeeeneeseneeseeceesecteaeeseeseeeeeeeeeees 6 PSE UII AIS ONC I etext asateseains gece caine aletsens caine E ETE 12 Working with the Easy Refraction MOCUIEC cccssscccesecccecccesscecenecccecceeuseceaececeueeeeeneeeegecesenecesseeteggeetes 15 Identifying travel time curve fragments related to different lAayVers ccccceeccceesseeeseeeeeseneeeeeseeseeseeess 17 Automatic Gravel time INVE Olier E 19 Manual travel time inversioOn ssssssssssssssersssesssssersssrrsssrrrssrresssressssresssrrsssrreererressesrrereesessrsrreresererrene 20 BOO IN NE TE SUVS E E EE 23 Introduction This Guide is intended for users making their first steps in refraction seismic survey RSS data processing in RadExPro using the Easy Refraction module The Guide covers all proc
5. Variable density display mode Normalizing Factor E fe Grep C None w Ensembles gap 2 H B Entire screen C Custom Individual Muliple panels i C Hone W Use excursion 20 races Data velocity f Display data C Display velocity RE Show headers Plot headers Header mark Picks polygone settings Save Template Load Template l Click the Axis button and set the following axis parameters 15 Aois Parameters Time m i ds Values ct Te cpu x Different C Interval F Primary lines 00 0 m C Multiple fioo Iw E Secondary lines li 00 0 _ Different eld Interval 100 0 m Multiple Font size 20 Margins Left axis Ta Ul P axle cancel marge 2D ram TOR oji Run the flow and see the data as shown below Gg My project My area Line 1 030 Picking 19 49 09 o x Zoom Common parameters View Tools Exit Stopflow Exi Exit ae 6eedee Ol Ww Tr 172 Sam 505 Amp 0 t 505 0ms 4 Select the Tools New pick menu item and perform first arrival picking After that you can pick first arrivals or extremums Use zoom unzoom buttons on the toolbar to select convenient scale You can select the mode of picking in the Picking parameters dialog achieved through the Tools Pick Picking parameters menu item 16 C Hunt F O Auto Fil Halt treshald 0 2 C Linear Fill C Eraser P Show hunt dire A es ail gt Smoot
6. MB1 Drag module Ctrl MB1 Copy module MB1 DblClick Module Parameters MB2 Toggle module Ctrl MB2 DblClick Delete Select the Run menu item to run the flow The Screen Display window showing the data being entered will open and the data themselves will be read from the file on the hard disk and saved to the database The Screen Display window that should appear on the screen is shown below w AS fia D 4 n w AQ N B Sas hp i z J a M uA i i E is i ni ay WE j ule te ty Ned Now we need to assign the geometry source coordinates SOU_X and receiver coordinates REC_X to the seismic data We will use Near Surface Geometry Input module for that Create a new flow 020 Geometry Input add Trace Input module select the raw_data dataset that we have created before and load all traces in the order they are stored in the dataset for that chose Get all option of the Trace Input 10 Uf RadExPro 2011 3 gt gt gt My project Help Options Database Tools Exit Sort Fields Selection Select from file File Database object Choose Cancel f Get all
7. Removal ___ Bur __________ Ensemble Eaualization _ MB1 Drag module Ctri MB1 Copy module MB1 DbIClick Module Parameters MB2 Toggle module Ctri MB2 DbIClick Delete Geometry Headers Interactive Tools Signal Processing Data Enhancement Vis Now click Run in the menu to execute the flow As a result we will have a copy of the data with geometry assigned First arrival picking Create a new flow named 030 Picking and add the Trace Input module to it After that add the newly created dataset to the Data Sets window and apply sorting by SOU_X and REC_X to the entire selection 14 Trace Input Data Sets Sort Fields da SOU Y Delete Add Delete f Selection n C Select from file C Database object _ Cancel C Getal Then add the Screen Display module selecting trace image scales and amplification factors suitable for first arrivals picking Additional processing procedures such as Bandpass Filtering Hand Static etc can be enabled as necessary However you should keep in mind that filtering especially zero phase blurs first wave arrivals therefore first arrivals picking should be done before filtering In the Screen Display dialog set the following parameters Display parameters WoT display mode From t 0 0 to 511 0 M 6t Scale 0 aT tad Co OWT Number of traces 200 Seale E M vA _ e None W Ensemble boundaries Variable spacing
8. curves count 7 X 0 46 m T 73 ms 22 Similarly select the second marker and mark the travel time curve sections related to the second layer Visualization of individual travel time curves can be disabled by unchecking the appropriate boxes in the left pane of the module f Easy Refraction a 3 se P ee ZA a o File View Iime Curves Refraction surfaces Inversion Help D mm 1 AA A AmA 7 23 Distance m Z pick_symmetric 6 0 6 12 18 24 30 36 42 48 54 3 710 pick 4 11 80 pick 4 23 pick 4 35 pick 60 5 747 pick 5 770 pick Time ms 40 20 0 Time curves count 7 X 13 81 m T 87 ms To exit the marker mode open the Time Curves Marker 2 menu item and left click or press the key on your keyboard to uncheck it Automatic travel time inversion With the Easy Refraction you can invert travel time curves either automatically or manually We will check both methods below For automatic inversion prior layer selection with the marker is required select Inversion Automatic inversion menu command you can also press F5 or click on the green arrow on the toolbar Easy Refraction Ta P o _ n xX File View TimeCurves Refraction surfaces Inversion Help gt im MD i Z Q QP Automatic inversion F5 23 Recalculate grid Distance m pick_symmetric 24 30 36 42 48 710 80 Composite travel time curves pick F 11
9. data load in the same manner as you created the area and the line P RadExPro 2011 1 gt gt gt My Project Help Options Database Tools Exit MB1 DbIClick Default action MB2 Context menu MB1 Drag flow to line to copy Switch to the flow editing mode by double clicking the flow name with the left mouse button This will open the flow editor window where we will now create a flow consisting of the SEG Y Input and Trace Output modules Specify the data reading parameters when adding the SEG Y Input module SEG Y Input File s Sample format Sample interval tT data 100 sqy Clit lat lat A4 Number of traces E data0 sgy M IBM Floating Point data4115 datas 235 et Trace length 024 data325 say J W Use trace weighting factor f Big enidan byte order SEGA standard C Litte endian byte order Sorted by FFID OFFSET Get all C Selection f 30 Survey C 2D Survey Profile ID Remap header value Add Delete Load ist Save ist Cancel After adding the SEG Y Input module add the Trace Output module to the flow This module will save the read data to the database so that they can have geometry assigned to them at a later time Name the object that will contain these data ine 1 raw and place it at the second database level in Line 1 as shown in the picture below Select dataset 23 Object name Objects Location E M Area Be Line 1 ie 010 data load Rename Del
10. specify the following parameters Receivers e First receiver position 0 e Receiver step 1 e Number of channels 48 Streamer sources 12 Let us specify each source position manually Select Variable step option to see the table with the shot point numbers and their coordinates Set Number of sources to 5 and type their coordinates into the table 1 0 2 11 3 23 4 35 5 47 Offset sources Select Variable step option set Number of forward sources to 1 and type in the coordinate of 24 m The same way set Number of reverse sources to 1 and type in the last shot point coordinate of 70 m This data was acquired in such a way that the original field channel numbering is not sequential 1 25 2 26 etc a result of some technical peculiarities of the receiving system However for correct geometry assignment we need the channels and shot points to be numbered sequentially in the order they were acquired in field To correct the numbering we switch on Reassign FFID and CHAN headers option This would recalculate and reassign all shot point numbers and channel numbers according to the order the traces input the module in the flow Finally the dialog shall look as shown below Near Surface Geometry Input Reflection MASW Refraction Receivers First Reciever Position Number Of Channels Redever Step Streamer Sources f Const Step Number of Sources Variable Step Offset Sources Number of r Number of Fo
11. 8 32 36 40 44 Te curves count 6 X 11 26 m T 64 ms You can make a number of manipulations with the time curves here edit nodes smooth them interpolate move etc Refer to User Manual for the details As an example of such a manipulation we will mirror one of the curves When we were picking fist breaks the data from the first shot at 24 m was noted to be of very poor quality so it was difficult to make a reliable pick So now if you have created a pick at the shot point 24 delete it click of the pick in the list of picks in the left pane of the window and press Delete key on the keyboard We will substitute this pick with a mirrored pick from the shot point at 70 m although we need to understand that this is not 100 fair procedure of course For that switch off all time curves except of the one from shot point 70 m select it with the left mouse button and select Time Curves Mirror curve As a result we will have a symmetrical time curve tied to SP 23 m fey Retetion O M File View Time Curves Refraction surfaces Inversion Help ey st x Edit i GO gt 10 c gt Interpolate pick S82 Color mode Distance m 7 14 21 28 35 4 Pp pick 7 Delete SHE 23 Delete all 5 35 Travel bene ieenee SSS Se a ee 4 eens po a C 5 F 47 ae Marker be pick a Shift to zero E Ho Smooth curre Duplicate curve H i H i H i j i Mirror curse I j l Adjust Coordinates
12. V pick v 23 pick 60 7 35 pick 7147 pick v 70 pick 80 Time ms amp me curves count 7 X 10 95 m T 80 ms The results are shown in the picture below the position of the boundary between the first and the second layer has been built in the lower part of the module working window Velocities above and below the boundary are colorcoded 23 eno Eo O 12 CEE OS ction surfaces Inversion Help 474 2ahoO p Distance m 24 Press t key to show hide layer velocity values at the section Manual travel time inversion If necessary all refraction processing stages can be carried out manually with the full controll over the intermediate results The module allows building the difference between two travel time curves To do this select one travel time curve with the left mouse button another one with the right mouse button and open the Time Curves Travel time difference menu A graph showing the difference between the two selected travel time curves will be built in a separate window If diving waves are registered in the first arrival the entire difference graph will be a decay function if head waves are registered the function will decay at first but then will become constant 24 a Travel time difference between 100 0 pick pick PEEN EEN ENEN EEEE SEE ee p EE E eee 3 z z H 4 H
13. a pick _symmetric 24 Time ms SP 47 ID Composite 1L Time curves count 9 X 38 853 m T 69 ms RT 4 437187 d iN T A _ ae According to the reciprocity principle the time of travel from the source to the receiver does not change if you swap the source with the receiver This time corresponds to the reciprocal points on the direct and opposite travel time curves Therefore travel time curves need to be tied at the reciprocal points The module allows viewing the mistie and leveling the reciprocal times Points to be tied are selected automatically when the user selects two travel time curves using the left and the right mouse button Reciprocal time RT mistie between two reciprocal travel time curves is shown in the lower part of the module window To tie the reciprocal times open the Inversion menu and select Reciprocal time leveling This function allows finding the average of the reciprocal times and automatically adapts the travel time curves to that average time Easy Refraction File View TimeCurves Refraction surfaces Inversion Help em X amp 4 i A Aa HCP 23 Distance m pick_symmetric Composite 1R pick 11 pick pick pick pa amp o hm n pick 0 SP 0 ID Composite 1R 12 SP 47 ID Composite 1L Time curves count 9 X 9 04 m T 69 ms RT 4 437187 The module also allows building a tO travel time curve and a residual travel time curve To do this s
14. elect the direct travel time curve with the left mouse button the opposite travel time curve with the right mouse button and open the Inversion Velocity analysis and time depth functions menu The result is shown below 26 Easy Refraction i al View Time Curves Refraction surfaces Inversion Help File BeimixaAe 49 it Fe A 23 2 HO gt Distance m pick _symmetric 0 6 12 18 24 30 36 42 48 0 V Composite 1R D 2 Time ms Composite 1L pick 70 pick 0 SP 0 ID Depth function 11 Time curves count 11 X 26 00 m T 99 ms RT 0 Finally you need to select the velocities of the upper layer and specify parameters of velocity calculation in the lower layer Select the Inversion Refraction Surface menu item to see the following dialog Inversion parameters V1 Estimation V2 Estimation Automatic Y Automatic lb 15 10 Corect values manually Corect values manually OK Cancel Delete existing refraction surfaces V1 Estimation you can specify a constant velocity of the upper layer or make it calculated automatically by linear interpolation between the values estimated at every SP V2 Estimation parameters how to estimate the lower layer velocities from the time depth function Here Window width specify how many nodes of the time curve will be taken into account for velocity estimation at every window position defined b
15. ep is optional data located outside the project can also be read storing the data within the project directory allows the program to use relative file paths rather than absolute ones This makes project migration from one computer to another easier J RadExPro 2011 1 gt gt gt My Projec Help Options Database Tools Exit C MBL DbiClick Defa ult action MB2 Context men u MB1 Drag flow to line to copy The RadExPro database has 3 structural levels The upper level corresponds to the project area the middle level to the line and the lower level to the processing flow Right click the yellow circle select the Create new area option and enter a name for the project area P RadExPro 2011 1 gt gt gt My Project a Help Options Database Tools Ext Create new area The picture below shows the dialog box prompting you to enter the area name New area name In a similar manner right click the yellow rectangle with the area name select Create line and create a new line P RadExPro 2011 1 gt gt gt My Project Help Options Database Tools Exit View map Create line Rename Delete Enter the line name just like the area name Fa 7 Mew line name 2s g t The database allows storing several areas within one project and several lines within each area Each line is processed by several flows Data loading and geometry assignment Create a processing flow named 010
16. essing stages from data loading and geometry assignment to first arrival picking identification of travel time curve sections corresponding to different layers and finally travel time inversion and generation of a layered velocity model of the medium It is assumed that the user is already familiar with the theory behind RSS and the tO method Source data as well as the project that should be generated as a result of completing this tutorial can be downloaded from our website http www radexpro com downloads tutorials Creating a project A project is a combination of source data intermediate and final processing results and processing flows organized into a common database used by RadExPro seismic data processing package Projects are stored in separate directories on the hard disk When a new project is created a project directory is automatically created for it Projects can be moved between computers by simply copying the appropriate directory provided that all used data are stored within that directory Launch the project manager by opening the Windows Start Menu and selecting All Programs DECO Geophysical RadExPro 2011 2 ey DVD ctyana Windows 0 Opera gt Windows Media Center user3 ra Konnekyna rapete paGboyero ctona ie Nporpammel no YMONYAHHHO Jory Ment Npourppipatens Windows Media q Cpeqcteo npocmotpa XPS VBo paxenna ge Pacchi n ckaHMpoBaHnne Windows Miyspika g Llentp obHosnenna Windows ae Mrpe Komnbro
17. ete Also add the Screen Display module to the flow after the Trace Output module for monitoring purposes The resulting flow should look like this Help Options Database Tools Run Flow mode Exit SEG Y Input lt multiple Trace Output gt line 1 raw Screen Display Trace Input Trace Output VSP Data Modeling 3D Data Output Super Gather Lamb Solid Layer Solid modeling JIOTMC SCS 3 Input SEG B Input SEG Y Output 2D Finite Difference Modeling Ensemble Stack Deconvolution Custom Impulse Trace Transforms Nonstationary predictive deconvolution DC Removal Resample Bandpass Filtering Trace Math Transforms Wave field subtraction VSP Display 3D View Velocity Editor 3D Gazer Plotting VSP Migration STOLT3D Curved Profile VSP Migration Trace Math Trace Length Data Input Data Output 3D Data Input SEG D Input GSSI Load Text Trace RAMAC GPR SEG 2 Input SEG Y Input Text Output Asymptotic CCP Binning Predictive Deconvolution Surface Consistent Deconvolution Hilbert Transform Amplitude Correction Butterworth Filtering Zero Offset DeMultiple VSP SDC Screen Display 3D Screen Display QC Analysis Interactive Velocity Analysis Advanced VSP Dispaly T K Migration Stolt F K Migration 2D 3D VSP Migration X Interpolation Trace Editing Stacking Ensembles Deconvolution Signal Processing Interactive Tools Migration Trace Editing Data Enhancement
18. hing Window length 3 points r Drawing parameters Marks only Line style Label A Picking can be done manually Mode Manual or using on of the semi automatic modes Auto fill or Hunt In the Auto fill mode the program automatically tracks selected event between two interpreter pick nodes according to the specified Parameters In the Hunt mode it would try to follow the specified event in either one or both directions from the initial pick until it looses correlation To perform picking click the left mouse button when the mouse cursor is over the selected point An X mark will appear at that point showing a pick node Click the left mouse button once more within the same trace to move the node to a new position or click within another trace to place a new node An erroneously placed node can be removed by right mouse button double click or moved to a new position by drag and drop with the right mouse button B My project My area Line 1 030 Picking 19 49 Lo Zoom Common parameters View Tools Exit Stop flow Exit GAS Gee 6EG6G0 OU we Hunt direction Tr 154 Sam 0 Amp 160 t 0 0ms 4 You need to pick all seismograms To save the pick select the Tools Save As menu item or right click on your pick in the Pick List window and select the same Save As command from the pop up menu 17 This will open a dialog box where you will be asked to enter the pick name and specify which database object the p
19. ick will correspond to by left clicking the appropriate object The program also allows saving travel time curves as text files for further use in other interpretation software Tools Pick Export pick save pick EES Object name pick Objects Sa B Fiename Delete Location E My Area Line 1 010 data load D20 pick D30 refraction 7 Pick headers Cancel F Press Pick headers and make sure that SOU_X is selected in the left column and REC_X in the right column Pick headers e z3 RECHO S_LINE SCOP SECOND SEGDGAIN SEWMO SFPIND SOU_CAL SOU DATUM SOU ELE SOU_H200 SOU_INL SOU RESID SOU_SLOC SOU STAT SOU STAT SOU STATS SOU STATS OFFSET FATH PICK PICK PREAMP R_LINE REC_CRL REC_DATUM REC ELEV REC_H200 REC_INL REC_RESID REC_SLOC REC_STAT REC_STATI REC_STAT2 REC_STAT3 REC UPHOLE Cancel 18 Working with the Easy Refraction module Create a new flow named 004 Easy refraction and add the Easy Refraction module to it Select Browse in the dialog box Choose Easy Retraction scheme ler Browse Cancel This will open another dialog box prompting us to specify the scheme name An Easy Refraction scheme is a combination of travel time curves possibly divided into segments corresponding to different layers generated as a result of boundary processing etc When the user exits the module its current state is s
20. rward Sources Reverse Sources C Const Step 1 24 f Variable Step W Reassign FFID and CHAN trace headers Cancel When the parameters are set click the OK to save your settings Now we will add Trace Output at the end of the flow to save the data with assigned geometry to a new dataset in the project database We will call the new dataset geom_data and place it at the Line 1 level of the database as shown below 13 Select dataset qe Ge Gee ge Object name geometry_data Objects Location raw data E bly area l Line 1 010 Data load 020 Geometry Input Rename Delete The resulting flow shall look as following Z My project My area Line 1 020 Geometry Help Options Database Tools Run Flow mode Exit Trace Input lt raw_data Near Surface Geometry Input Trace Output gt geometry_data Trace Input Trace Output SEG Y Input SEG Y Output SEG D Input RAMAC GPR SEG B Input JIOMC SEG 2 Input GSSI SCS 3 Input Super Gather Load Text Trace Text Output Data Input Trace Header Math Header lt gt Dataset Transfer Header Output Trace Header NMO NMI Screen Display Plotting DC Removal Resample Bandpass Filtering Trace Math Transforms 2D Spatial Filtering Burst Noise Removal Data Output Compute Line Length Header Averager Shift Header Surface Consistent Calibration 3D Gazer Hilbert Transform Amplitude Correction Butterworth Filtering Antenna Ringdown
21. tep laHenb ynpaBneHna Eriti pace RTA ee oe J ye ee a Se p ao Jnistall Kadtx ro di Documentatio YcrpolcTea M MpHHTEpbl d BTO3arpy3Ka lporpammbl 10 YMONYAHHHO de Mrpet d ObcayKMBaHHE a COpabkKa n nopyep ka 4 Hazag Houmu npoepaMMbi U alibi F RadExPro Project Manager Registered projects New project Select project Remove from list Save list Load list Project directory oad Ils Uk Cancel Click the New Project button and select a parent directory on the hard disk where the project subdirectory will be created Another dialog box will appear prompting you to enter a project name New database Title My Project W Create subfolder mea _ _ Make sure that the Create subfolder option is checked and press Ok A subdirectory with the same name as the project will be created in the selected directory The project will also appear in the list of available registered projects RadExPro Project Manager Registered projects New project Select project Remove from list Save list l l Load list Froject directory _ Loadist Ds uisers kateshMu Project OF Cancel Select the project and press OK This will open the main RadExPro window containing the project tree Before starting to work on the project we recommend creating a directory called data within the project directory and copying all data to it Although this st
22. tored in the scheme Choose Easy Refraction Scheme nn J 2s Object name scheme Objects Location E My Area l Line 1 D10 data load U20 pick O30 retraction Rename Delete After entering the new scheme name press Ok and run the flow The Easy Refraction module working window will open 19 j Easy Refraction k p amp File View Iime Curves Refraction surfaces Inversion Help Gy ast FAAC C E Distance m 0 11 22 33 44 55 66 77 88 99 Time ms 0 11 22 33 4 55 66 77 88 99 Distance m 3000 1753 505 Depth rm 0 11 22 33 55 66 77 88 99 Time curves count 0 Press the Load time curves button to load travel time curves This will open the travel time curve selection window Load the necessary time curves and press Ok f My area My area Line L pick Line1 L 010 Data load 7 020 Geometry Input fa 030 Picking 7 040 Easy refraction OK Cancel The module window containing the loaded travel time curves will appear 20 File View TimeCurves Refraction surfaces Inversion Help Gg i A gr N 0 gt 7 0 Distance m pick 0 4 8 12 16 20 24 28 32 36 40 44 4 11 F lt lt D D 2 Q lt D ea V pick Time ms Distance m 0 4 8 12 16 20 24 28 32 36 40 44 0 t i 3000 1909 50 817 T a 274 100 i H H H 0 4 8 12 16 20 24 2
23. y Window step We will keep the defaults here and click the OK to see the following result 27 Easy Refraction sgt ie File View Iime Curves Refraction surfaces Inversion Help ALIR Tai Er A m 3 23 Distance m pick_symmetric 0 4 8 12 16 20 24 28 32 36 40 44 0 Composite 1R v pick 11 pick 23 pick 35 pick 47 Composite 1L pick 70 pick Boundary 1 Distance m 0 4 8 12 16 20 24 28 32 36 40 44 1861 0 0 1324 366 786 a i a 417 249 ross F 1861 Ei 1386 1380 1392 JA 11405 TR 1764 a i 10 E E a a 4 10 Time curves count 11 X 23 96 mT 99 ms RT 0 Exporting the results _ E E l You can export the results of your work by selecting the File Export menu command This will open the file saving dialog box Select what to export and in what format to save it from the File Type drop down list Fa COXpaHHTb Kak Ax it a pe HEegAEHHE OOK YMEHTI r5 Mow QoKYMeEHTbI of 59 Mor H KOMMb ATED 4 J Ma pana E Ceresoe Tan pa na You can export the following data to a text ASCII file 28 X coordinates altitudes velocities and layer depths as one ASCII table Plain text travel time curves Time curves refraction boundary depths Borders velocities Velocities Refraction boundaries can also be exported in the DXF format 29
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