SEG-Y Importer in Oasis montaj

Overview

Video Transcript

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(lighthearted music)

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<v ->Hi everyone.</v>

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My name is Sean Goodman.

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I’m a technical analyst in our UK office.

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And what I’m going to be quickly running through today

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is the new SEG-Y Importer in a ways it’s montage

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and I’ll show you how you can link it

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into building some GM-SYS profile models.

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So the new importer is found in a “3D view” menu

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down at the bottom here.

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So it’s “Import SEG-Y”.

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Now, what we can do is we can select

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between 2D or 3D volumes

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and in time or depth as well.

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So here I have a 3D volume as just a SEG-Y file

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and it’s in time.

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What I can now do once I’ve selected

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my file is look at the text header.

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If you are entirely at the mercy of your seismic processes,

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in terms of how well these are filled out,

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and then you can look at the binary header file

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and the Trace Viewer File.

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And what we can do is we can select the buy order here.

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So big-endian or little-endian, trace data format.

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And we can vary through the current traces to see what they

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look like.

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So I’m going to click next now.

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And again, here we come to the, the key field locations.

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We can define the bites order.

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We can look at the samples per trace interval,

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and first sample at,

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again we can select the trace data format,

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but all of this will be standardly filled out automatically.

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So once we get to the coordinate mapping section,

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we can define the coordinate system here.

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Everything else will be automatically filled out again,

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including the Inline and the Crossline coordinate

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X and Y coordinates.

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So I’m going to fill out the coordinate system here

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based on another grid that I have in this project,

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and that will automatically update

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the projection method and data.

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So here I can select the source of the tie points.

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So that’s either calculated from the trace headers

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or user supplied.

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I can define an output survey file and all of this is

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automatically populated again, based on the input files.

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So here I can actually select to a dummy top and bottom

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traces based on a certain value.

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So I’m going to select zero for this one.

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If we’re bringing in a very large 3D volume,

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then we can subsample the volume so that we don’t bring the

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whole thing in and, and spend a lot of time processing it.

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And the output files here. So we can generate a voxel.

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We can select certain slices to generate

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and we can generate database as well.

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So here I’ve got the Voxel ticked

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and I’m going to generate some slices

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and these are preselected.

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So I’ve got some Inlines.

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I can select some Crosslines

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and some Horizontal Z slices,

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and now I just press, “OK”.

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And that will run and load those in.

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So once that’s loaded in, what that creates is the Voxel

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within the menu here,

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and a series of section grids in the grid menu.

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So “IL”

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“XL”

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and “Z”

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So we’ve got,

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Inlines, Crosslines and Z slices within these grids.

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And now what I can do is create a new 3D view so that I can

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have a look at all of these together.

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So I can just drag and drop my 3D Voxel into the 3D view.

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And as you can see the color tool for the Voxel,

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even though it’s seismic is in the

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traditional gravity colors.

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So here, I’m going to select “Color Tool”

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and I’m going to move towards a Seismic Colorbar.

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And then once I’ve done this,

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I’m going to save this as a transform.

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And this means that I’ll be able to apply this to any other

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grids that I add into the 3D view.

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So now I’m going to add in some of those section grids that

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we imported

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and I’ll just go through and select the ones that I want

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from the menu here.

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And what I can go to is my color tool again.

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And I can actually browse for the transform file that I just

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previously created.

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And what this will now do is add that,

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add all of those grids in

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and apply that same color tool to all of the grids at the

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same time,

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without me having to manually go through

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and update each individual one.

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So now we have a seismic sections within the 3D view.

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We can also show our

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voxel

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and what we can do is clip various

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various points.

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So we can clip in the “Z” orientation or from the top.

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We can see how that varies with depth.

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We can clip in the Y orientation and slide through

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and see how the structures vary

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and again in the X orientation.

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So what we can now do,

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if we want to make some GM-SYS Profile Models from those

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section grids, that we’ve just imported,

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we can go to section tools and save those section grids

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to a database.

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Now in this input grid files,

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we can select numerous Inlines and Crosslines and save them

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to a single database here.

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So what this does is for each of those selected lines,

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we now have X, Y and elevation channels defined.

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So this makes it easy for us now to just

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go to GM-SYS profile and create a new time model.

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So we’re going to import from the database line,

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and we’re going to

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we’ve navigated to that, the demo lines one database,

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and we’re going to make a model for Inline 1702.

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So as you’ll now, see, it looks slightly different

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in GM-SYS, this is a result of the 9.8 update.

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So we now have a view manager on the left-hand side.

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What we can actually do is import numerous section grids

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in the depth and time windows. We can also bring,

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we have full format functionality,

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so we can bring things into the plan view window as well.

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So actually what I’m now going to do is add in a new grid.

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One of those section grids for this line,

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this is geo-referenced automatically.

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So I can select that grid file there.

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I can remove the shadow and this,

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this shows me the color that it’s going to use as well.

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And I can select the target pane to be the time section.

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So now that’s immediately brought that in and I can then go

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and digitize any horizons along there and start to build out

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a model as well.

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What I can also do if I’ve got a predetermined image,

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which is geo-referenced within Oasis montage,

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I can now display an image as well.

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So in this example,

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I’ve just drawn some lines over a PNG of Inline 1702,

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and geo-referenced it.

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And now I can bring that into the time section as well,

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and that will overlay that here as well.

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And so I’ve got some interpreted sections on there as well,

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and now I can switch between the two.

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So that’s how you can build out models quite easily

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from the SEG-Y Importer.

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So that’s, that’s all we’re covering off today.

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So, so thanks a lot for watching and good luck.