Modeling - TESSERAL Technologies Inc.
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1. 2012 Tesseral Technologies User Documentation 6 Tesseral 2D User Manual Modeling After defining the medium model and survey layout dialog Framework you are ready to start numerical seismic modeling Button b or menu Run Modeling allows to see Modeling dialog for configuration and executing various types of numerical simulation Please see the dialog s 2 Computation Progress dialog runs together with calculations 2 Tesseral 2 D Elastic Equation Modeling v Pushing the button Pause stops the process process When the process is inactive Pan Emere caption of the button changes to the Point 3 of 6 Terminate Resume Pushing it again activates the 100 RRR RRERRRRRRR ae Overall ov SSFFoon v You can iconize the dialog window by pushing baton Hide or termmhate the Processors cores available 4 licensed 4 used 4 process using button Terminate In case of canceling warning dialog appears Y If computation dialog is hidden you can make it visible by pushing process icon in lower right main window corner or with menu sequence Run Show Computation Dialog You can view current computation results short after their starting v You can change the size and state of the pane during monitoring While monitoring you can see both shotgather and the current snapshot of the propagating wave field You can change the picture properties Vv It takes time to draw the pictures so th2. over the preceding one selected before drawing The most convenient order of their appearance during the model building is from the top to the bottom of the model There may be later modifications of the medium model insertions deletions pasting moving etc of polygons or their parts Additionally Y You can enter the pad image and draw polygons on top of it open the image using the dialog Open Picture Files see its 2 Help v You can also enter acoustic shear and density well logs in the form of LAS format files and use them to build a thin layered model Open Files of type LAS files las see the dialog s 1000 2m 2000 v You can also use created in other packages grid model in SEGY pie menu File Import Grid Model see ne dialog s P 3000 Y You can enter the model data in the text and other formats dialog t Open see the dialog s 2 for creating or completing the Modelbuilder model When you Start the program after the initializing dialogs the Modelbuilder pane is automatically opened and you can start creating draw on screen a new model v The application s main window may be split in several panes 2012 Tesseral Technologies User Documentation 3 Tesseral 2D User Manual Model tes VR e i ee File Edit View pa Scale Magnitude Run Wingo 7 Jk EDLE LELEN EE o Ez Main Menu and Toolbar Color Scale
3. basic ones Please see also in Component About Resulting Data by default are saved in the current model folder Files have extension tgr internal binary format and sgy SEGY format Their names are indexed as lt Model name with version suffix gt Gath Snap Wave Time lt Method gt lt Mode gt lt shot generation number gt tgr e Gath Snap Wave Time corresponds with the resulting information type e lt Method gt coded by I C A E N V letter corresponds to the computation formula vertical incidence scalar acoustic elastic anisotropic viscoelastic e lt Mode gt coded by P S H W letters corresponds with the generation processing mode point source exploding surface exploding reflectors sum e lt Shot generation number gt is present in intermediate results At normal completion of the program they are merged in a common resulting file no number at the end 2012 Tesseral Technologies User Documentation 8 In difference from modeling for surface seismic for modeling of You can obtain the curves of reflection coefficient for selected boundary as a function of incidence angle or amplitudes as a function of offset from the source AVO modeling in a package is carried out in two variants 1 Numerical AVO modeling can be done for 2 2 5D 3 ETTE 2 Tesseral 2D User Manual VSP and Well to well Modeling VSP in the Framework Observation dialog page you ne
4. 3000 Compressional velocity 2500 m s __ K 605 583m Z 629 032 m 4 v Please use toolbar button to get more detailed informationdsja nonyyeHua Oonee OemanbHou UH opmauuu Framework dialog initially appears at creation of anew model It contains a number of pages Cross section Source Signal Observation allowing setting the Survey Layout used in modeling v This dialog may be also called any time by pushing Framework toolbar button or vida Edit popup menu item v Please use at dialogs pages and see provided description Options dialog allows to set general user s Options like selecting measurement units and other defaults used by the package Use toolbar button Options or the corresponding File popup menu item Polygon dialog allows assigning the medium properties velocities density etc for the selected area polygon v At the initialization of a new model this dialog appears for assigning properties for the base initial polygon the area of the base polygon covers the whole model rectangle and has 0 number Over it can be drawn other polygons Y Then this dialog appears in the end of a new polygon drawing or when user double clicks inside of the visible area of already existing polygon It also can be called using toolbar button 8S or right mouse popup menu Drawing Model v Please see corresponding bookmark in the toolbar Help document 2012 Tesseral Techn
5. Multiparameter Numerical Medium for Seismic Modeling Planning Imaging amp Interpretation Worldwide TESSERAL GEO MODELING You can TESSERAL WORKPLACE FLOWCHARF reer 7 CY i Inline Help produce synthetic gathers snapshots of the wave field time field of the incident waves time cross sections and other seismic images AVO dependencies for 1 Full Wave Modeling core Synthetic seismic Most energy Shotgath Arrival time amp 2 AVO Energy Fields Modeling Models of virtually arbitrary complexity including the ones with strong lateral velocity contrast steep boundaries compartmentalization and caustic zones producing the waves of complex ray path including those reflected from the vertical boundaries etc 3 Processing Block SE OP eee p s s u f 5 Seismic Model Models with complex Henshall topography and various near surface conditions including the situation when source receivers are on different elevations traps permafrost low velocity zone of variable thickness by correctly taking into account kinematics and dynamics of surface waves satellite waves refractions etc 4 Time o Depth Conversion Thin layered models that are built on the basis of the acoustic and density well logs Transversally isotropic media models with the tilted symmetry axis which may be complicated by tilted frac
6. e graphical monitoring slows the calculations If you do not need it you can iconize the viewer window When calculation is finished the viewer panel show resulting shotgather and snapshots of the last calculated source position v You can not only stop the execution of the program but continue it even after it was cancelled or crashed If the computation was not finished and you call the Modelbuilder you will see warning message 2 Continue from Recover Point No Cancel Depending on answer there will be such actions v Yes the unfinished computations will continue v No computation is not continued and intermediate results are destroyed Y Cancel program returns to previous before dialog appears state 2012 Tesseral Technologies User Documentation 7 Tesseral 2D User Manual Report Pane Some text information relating to computations and other data manipulations is shown in the Report window v It always opens when the computations start Otherwise use the View menu popup list item ee v Data that was during last session in the Report is stored in the current folder with Tesseral log name for possible later analysis Wave field Components Synthetic data contains number of the seismic wave field components They represent a set of dynamic physical parameters changing with time Most of them are basic analogues of ones that can be measured in the field observations some are derived from the
7. e see corresponding bookmark in the pane menu 2 Help Converting Model in other formats You can use File Convert to menu options Model grids The model prototype consisting from zero polygon defining minimal velocity must be initially created The model rectangle dialog Framework Cross section must be tied to coordinates of the model grid The model grid converted File Import Grid Model to the internal tgr format is placed in one pane Overlay with a model prototype In this case it will be used for calculations along with the model prototype Logically the grid is placed between the zero polygon and all subsequent ones v The zero polygon of the model prototype will fill all gaps in the model grid i e void values presented in the tgr file as zeroes For the non zero grid nodes the background polygon does not take any action Y Polygons with indexes gt 0 i e overlaying the zero polygon unconditionally are overlaying all corresponding grid values i e have higher priority over the grid Using well log data The Modelbuilder model is used as a pad at creation of the model basing on the LAS files In setting the parameters of the model rectangle should be considered that LAS files have absolute binding depths v To download LAS file use dialog t Open Files of type LAS files las v In detail work with well data and building a model for several wells is described in the Help System of the package
8. ed to select Vertical line option for receivers Well to well survey in the Framework Source dialog page choose Vertical line option for sources v Position of wells in which sources and receivers are placed can be easily changed using mouse dragging More exact numeric positioning can be done with Tune position dialog You can also i define a deviated well position and EE SS project receivers or sources on its i trunk described in detail in the wi 2 Mi Hi mM Tutorial see the relevant section ih TRAM i i AVO Modeling models of any complexity To carry it out you have EH at jinn HTT al to use option AVO modeling see dialog saan peat E Modeling At this receivers are positioned at some relatively small distance from the target boundary allowing recording incoming from the source and reflected from the target boundary waves as separate events for further calculation of AVO dependencies For their identification procedure of picking and correlation of these waves is used and then numerically are calculated AVO curves VO o ptions See ees Edt aan wave 5 ar Gamal Correlate I show vertices a ca Analytical 3D AVO modeling realized on the basis of the modernized variant of a solution of the full wave equation by Haskell Thompsen s method for horizontal thin layered stack Unlike 2D modeling here you can set axes of TTl anisotropy in layers in any direction as we
9. k time and depth migration time and depth VSP migration and AVO modeling The source and resulting data in popular file formats can be used or output for further analysis and processing in other packages The software runs parallelized calculations on a variety of hardware platforms including Windows networks and Linux clusters employing latest multicore and GPU technologies User Documentation Consists from a number of Help documents available inline using or F1 or toolbar or dialogs buttons or menu items v Use menu Help User Documentation for introductory information v This User Manual provides overview of the package core functions In other Help documents are described particular blocks and corresponding functionalities of the package v Tutorial Tutorial 2D pdf provides stepwise instructions for getting started Useful information can be found on the company s website www tesseral geo com v Primer provides introductory information about the modeling in seismic and its different applications Y Troubleshooting amp FAQ provides explanations answers and extended presentations to Frequently Asked Questions which may occur at using the package v You can also use training movies http www tesseral geo com support en ph v It is advised to download complementary library of prebuilt models with some templates allowing smoothly start evaluation of the package http www tesseral geo com download en php Tesseral Da
10. ll as a direction and an inclination of fractures For 3D models you have an opportunity to model azimuthal AVO effect from thin layered stack of rock taking into account also coupled refraction splitting of shear waves on fast and slow in case of monotypic and converted waves and to obtain AVO curves for the reflected and transitional compressional fast and slow shear waves There is a capability to analyze separately amplitude and a phase of a wave depending on frequency an azimuth and an incidence angle The given realization allows considering also viscoelastic frequency dependent absorption separately for compression and shear waves v In details please see the description in the Help of Modeling and subsequent dialogs 2012 Tesseral Technologies User Documentation 9 Tesseral 2D User Manual Analyzing Results with Viewer At the end of the simulation two panes show results the left with the calculated synthetic seismogram right with a snapshot of the wave field Viewer Pane has a separate set of tools although it has a lot of common with the Modelbuilder one See Help in the Viewer toolbar Gathers In addition to the internal grid format tgr can be read and used gathers in SEGY format sgy segy of any modification CSP CRP or CMP common shot receiver mid point During sgy gathers loading trace headers are modified At first opening of sgy gather dialog SegY Load Info is produced you can a
11. lso call it using menu Scale Seg Y Ruler allowing additional tuning before its using in the package For more details use dialog s button 2 Visualization Options Viewer allows tuning graphical image of resulting data in different ways for interpretation enhanced picture or and following processing one trace transformations and selections For this purpose use the EY Visualization dialog toolbar button or by double clicking inside of the pane and pop up menu View Data formats conversion between readable by the Viewer standard formats please use menu options File Convert to Seismic Processing o Fie Edt Yew Component Seale Mepis Bun Window Help ws n gt 0o02 OD QAR The package has a number of ET built in procedures for 3 I ao w pe prai IRG processing of the synthetic TEH athers and creating seismic j tf i images Please use Run peoeeannnenTeaNstecaa sere irait i Hian Hi tee ji About for more c A ji et ih iil H Hii iilii information al siti ititi MH iil z HEETE BURSTS Hie fit 2012 Tesseral Technologies User Documentation 10 TES 63 1 6 S 2I4SS704108 kci pa e ci gt 2 v 2 2
12. ologies User Documentation 4 Tesseral 2D User Manual Viewing Model View Options are presented in the View popup menu list Use the About item and see the description Component onent v You can select graphical representation for particular Ira Sea P property component of properties vector using Component ae Cocky menu popup list of available components ensity Shear Velocity v In the status bar you can see name of this component and corresponding value at the pointer position and the pointer coordinates Compressional velocity 2500 m s X 605 583 m 4 Y Color Scale allows you to see the correspondence between the colors filling the model C x and property values v Scale menu allows applying some modifications of the object image scale on the screen You can see the model in isometric same for horizontal and vertical axes or adjusted scale toolbar button HoH v Magnitude menu allows adjusting magnitude of graphical presentation of the property in different ways v You can control view of coordinate grid make print from the active panel or save it in a raster format convert the model in the SEGY grid format v By pushing button G Tune position you can see pointer hairs lines parallel to axes stretching from pointer This mode brings up dialog Tune Position with coordinate values which can be entered manually v You can view up to two Overlain pictures files in one panel Ove
13. rlain can be model and pad bitmap and snapshot or cross section in depth scale and model You can flip upper and lower images using amp toolbar button and tune transparency of the upper image using sane a button v The 2 Help in the pane s menu is providing general description of manipulations with panes Saving Model v The model data is kept as a text file with tam extension v Usually different cross section models and corresponding resulting information are kept in separate folders v To save the data you can push the ll Save button or choose from File menu popup list Save item v To save the model under new name or into another location follow the menu sequence File Save As You can use Create New Folder control er 2012 Tesseral Technologies User Documentation 5 Tesseral 2D User Manual v Ifyou did not save model data the reminder message will appear o By choosing Yes button user will follow through Mezea saving sequence If model is modified and not saved the model name with next version number e g Model 1 tam is proposed o Incase of No the new modified model data will be lost o Cancel button returns to the state preceding this message Loading Model v You can create a new model by clicking New Model on the toolbar or by a sequence of menu items File New v You can open another existing model or other data by pushing t Open toolbar button or by File Open menu sequence v Pleas
14. ta Samples look through overview of prebuilt models http www tesseral gqgeo com documentation en general DataSamples pd Starting by ge v You can start the program using its icon shortcut or pinned to taskbar icon S 42 or by the sequence Start Programs Tesseral Tesseral 2D 2012 Tesseral Technologies User Documentation 2 Tesseral 2D User Manual V The initial model data amp are associated with the Modelbuilder and Ji Computer OS C Tesseral Data _Starting Models seismic data i We Favorites jg E Ma P 3 BE Des tcp E Te B Model tam mouse click on these files from Explorer T Downloads A Modeltes Recent Place calls and executes the Tesseral 2D 2D here an installed variant of the package with relevant data You can run the package also using the method of drag and drop method Open with Tesseral Application l Creating Model A simple and quite flexible scheme of presentation of the modeled cross section area as a set of overlapping polygons is used Polygons allow localizing the distribution of the physical properties inside the chosen area The user normally sees the part of the polygons that is not overlain by others This visible parts are taken for calculations as the actual model presentation WYSWYG what you see what you get Polygons are arranged by the order in which user draws them The next new polygon may be drawn partially or fully
15. turing systems Models with visco elastic properties Q factor additionally allowing simulating the absorption of seismic energy and such wave effects as velocity dispersion Models for porous fluid saturated media Gasman approximation using different tools of numerical Seismic Modeling and prebuilt models allowing smoothly start evaluation and working with the package Model Builder allows the user to quickly build models with any level of rock property and structural complexity Sonic log data in LAS format can be used to input Vp Vs and density values to easily create thin layered models that are accurate representations of actual project reservoirs Fracture Tesseral 2D User Manual systems in up to three zones each with different azimuth orientation both vertically and horizontally can be defined e Viewer interactively presents the results of the modeling in a visual format that enables the viewing of wave propagation movies through the geologic model The movies can be run forward or backward to enable the user to determine the origins of all events and artefacts that are observed on the synthetic shot records Instantaneous flipping between the vertical X and Y direction and pressure wave records enables a full and rich understanding of the value of multi component recording e Seismic Imaging procedures enable the processing of the modeling synthetic data Capabilities include velocity analysis CDP stacking pre stac
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