Seismic Visualization_2009

Well Correlation Petrel Workflow Tools 5 Day Introduction Course Fault Modeling Pillar Gridding Zonation and Layering Facies Modeling Petrophysical Modeling Well DesignVolume Calculation Plotting Data Import In tr o t o P et re l E d it In p u t D at a Im p o rt d at a W o rk fl o w E d it o r Seismic Seismic – Data Visualization Objectives Visualize data in 3D, 2D (Base Map) and Interpretation windows Digitize a random lines Create arbitrary and aligned seismic random lines Crop a volume Realizing a cube Create a well intersection fence Tile windows Volume rendering 3D Window 2. To display a seismic line in the active display window click on the check box in front of a seismic line. 1. Display seismic: Open the seismic cube folder. An In-line and Cross-line are available. Add other seismic line types by right- clicking on the seismic cube folder and select the seismic intersection(s). ‘Base Map’ (2D) Window A Petrel 2D window is used as a seismic base map, allowing you to display and manipulate seismic lines as well as displaying other data (such as wells or interpretations). To create a seismic base map: 3 3. Under the Style tab specify the Base Map annotation settings. 1. Open a 2D window. Rename to Seismic Base map 1 2. Double-click on the Survey folder to open the Settings dialog. 2 4. Select the check boxes in the Input pane to display seismic lines. 4 Selecting Seismic Lines Method 1 A. Activate the Seismic Interpretation process and activate the proper cube (bold). B. Use the icons in the Function bar. Select line (in-line, cross-line, random line) using the left mouse button. Select in-line. Scroll with the mouse, click with left mouse button to select. Select cross-line. Scroll with mouse, click with left mouse button to select. B Step through volume Play through volume Go to end Set step/play incrementStop D Method 2 C.Activate line (in-line, cross-line, random line etc.) in Input pane. D.Use the player at the bottom of the window. Method 3 E. Click Manipulate Plane icon. F. Drag in window using Left mouse button. Note: these methods work for both 2D and 3D windows. A Create an Interpretation Window You can interpret in a 3D window or an Interpretation window. There are 2 ways to create an Interpretation window: B A Method 1 A. Right-click on a seismic line and choose Create Interpretation window. B. The line will automatically be displayed in the window. D Method 2 C.Go to the Window menu on the top toolbar and select New Interpretation Window. An empty Interpretation window will appear. D.To display a seismic line in the Interpretation window toggle on the check box in front of a seismic line C Interpretation Window 1. To Pan, position cursor on the lower, right white bar (horizontal/vertical movement) or anywhere else in window (free movement) - move using the left mouse button. 2. To Zoom, position cursor between the white and the grey lower/right area in the bars and move using left mouse button (or use Left mouse+Ctrl+Shift) 3. To Squeeze, hit the line between the grey/white area. Use Shift key + left mouse button to stretch/squeeze Note: It is also possible to zoom using the Magnifying glass in Function bar Drag a square using the left mouse button. To un-zoom use Shift+Z. 1. Automatically. Similar to an in-line or cross- line in that it is a vertical intersection extending through the seismic volume without any bends or turns. 1 Random/Arbitrary Seismic Lines In addition to displaying In-lines, Cross-lines and Time slices, you can create random or arbitrary lines through a seismic volume. There are five methods: 2 2. Using an arbitrary polyline intersection. In a 3D or 2D window, you define the desired path of the line. 3 3.Using a seismic aligned polyline intersection. Similar to an arbitrary polyline intersection, you define the desired turning points but the path between points is snapped to either the in-line or cross-line direction. Crop a volume 1. Select Insert virtual cropped volume from the right click menu on the seismic cube of interest 2. A new virtual seismic cube (identical to the original) is put under the original seismic cube folder in the Input pane denoted with [Crop] 1 behind the original name 3. The virtual seismic cube can be cropped manually by (a) activating Select/pick mode then drag the green handles or by (b) specifying cropping parameters in the Cropping tab under the Settings dialog. 2 1 3a 3b Note: A continuous readout of volume size is found in the lower right corner when graphically cropping down the cube Realise a volume 1. To make a new physical cube in the ZGY bricked seismic format, go to the Operations tab in the Settings dialog, Realize sub-tab 2. Select the Source amplitude range and realization quality 3. Click on Realize. The process is asynchroneous and its status found in the Task manager 4. The new realized cube will be put under the seismic survey folder in the Input tab 1 3 4 2 Note: If the values in the Source amplitude range has a ~ (tilde) in front, the range is estimated based on a smaller part of the seismic object. By clicking on the Scan button, the entire volume is scanned and the true amplitude range is defined. Wells – Displaying Data in Time 1.Load velocity data for wells (e.g. check shots, sonic logs, etc). In order to display well data in time, a time-depth relationship for each well is required. The general procedure is: 2.Create time log for each well. This will determine the time-depth relationship to use for displaying well data in time. 3.Display well bores. 4.Set domain and display picks and fault cuts. Wells – Import Check Shots 3.Adjust parameters if necessary and click OK. 1. Import check shots by right-clicking on the main Wells folder and select Import (on Selection). 2. Select file(s) and format and click Open. Wells – Create time logs 3. A time log will be created for each well. 1. Double-click on Wells folder to open Settings dialog. 2.Go to Time tab. If there are multiple entries, make sure the preferred time-depth relation is first on the list, toggle on and Run,click OK. Wells – Display Boreholes in Time 1. Toggle on the check box next to the Wells folder to display all wellbores. Alternatively, expand the Wells folder and toggle on individual wells. 2. Adjust display parameters by double-clicking on the Wells folder and going to the Style tab. Wells – Display Well Tops in Time 1. In the top toolbar, change the domain to TWT. 2.Toggle on the check box next to the Well Tops folder. Expand the Attributes folder under the Well Tops folder. 3.Toggle on TWT Auto attribute. Random Lines – Well Section Fence How to create a Well Section Fence 1. Open a new Well Section Window from the windows menu. Go to the Wells folder and toggle the wells you want to include. 2. The Well Section Fence is placed in the Well Section folder in the windows pane, only active when 3D window is open. 3. Click on the blue button: Toggle visualization on plane. 4. Click on the blue check box in front of the Seismic 3D cube. 1 2 3 4 Tile Windows Tile the 3D, Interpretation and 2D windows for better overview. Interpretation is updated dynamically between windows. EXERCISE Seismic Visualization