Geomodeling > Technical Tips > Tip #3 - Making a Lithitic
Technical Tips: Tip #3
Making a Lithitic
When we have our data in and make our synthetics, we have several workflows to help understand which seismic attribute best highlights our reservoir. This tip outlines one workflow. VisualVoxAt includes a full synthetics package. The menus are designed to guide you easily through the process of making a single synthetic, or batch processing all your wells. The synthetic process will be covered in next month's geophysical tip. After we tie our wells to our seismic, we are ready to make a lithitic. A lithitic is similar to a synthetic - it involves cross-plotting well log curves to understand how the geology presents itself to us in the seismic, then deciding which attribute will measure that response. A lithitic is designed to make sure we keep the geology of our area in mind, and it helps us to understand how that geology is presented to us seismically. We can use the cross-plot tool to cross-plot our well logs (Figure 1) so that we understand what is happening in the wells. In this workflow, we use the cross-plot to color our well log display (Figure 2). I displayed the colored log on my seismic so that I can see exactly what I need to measure seismically (Figure 3). Now I can analyze exactly what my reservoir looks like in seismic, so that I can quickly decide which attributes will measure it! Once I determine which attributes to use (the tables in Figure 4 list what the attributes measure, making the decision process easier for you), I run them on a single line to get my parameters. My next step will be to run them on a volume, sub-volume, or strata-grid. I can then cross-plot each volume and quickly pick geobodies that have the same attributes as my reservoir - going quickly from prospecting to prospect! Comments or questions? Please contact us at info@geomodeling.com - we look forward to hearing from you.
