Chapter 14 – Property Modeling3D Geological Modeling

Geometrical Property ModelingGeometrical Modeling is the process where you can use some pre-defined functions to generate properties (e.g. Bulk Volume, Depth, Height above Contact, and more). This section will describe general things about the property modeling, such as using filters and the property player. The distribution of properties in 3D, based on up-scaled logs, will also be described in general. Geometrical properties are properties created by using pre-defined system variables such as Cell Height, Bulk Volume, Depth and Above Contact. Each cell will get a numerical value corresponding to the selected system variable. These properties can be important in volume calculations and in mathematical operations between petrophysical properties (e.g. for Sw transforms). Geometrical Modeling is not restricted to simple geometrical properties such as bulk volume or volume above a contact level but also covers more complex property distributions such as: Random, Normal Distribution, Zones, Segments, Zones/Segments, Faults, Faults/Segments, Seismic, Connected Volumes.

Creating a Bulk Volume PropertyTo create a bulk volume property, follow the steps:1. Choose Property Modeling item from Processes Pane.2. Double click on the Geometrical Modeling process.3. A Geometrical Modeling with Top Tarbert window pops up. Select

Create new property option, see Fig. 14.14. Change the Select Method option to use for generating the new

property to Cell Volume Method.5. case use Bulk Volume as property template, as shown Fig. 14.26. Press Apply.7. Click OK. See Fig.14.3.

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Chapter 14 – Property Modeling3D Geological Modeling

Fig. 14.1: The Geometrical Modeling with Top Tarbert/3D Grid’ dialog box

Fig. 14.2: The Geometrical Modeling with Top Tarbert/3D Grid’ dialog box

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Chapter 14 – Property Modeling3D Geological Modeling

Fig. 14.3: Geometrical Modeling displayed in a 3D window along with the Pillar Gridding and zones while the Bulk volume is shown under the Properties tab in the Model Pane.

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Chapter 14 – Property Modeling3D Geological Modeling

Creating Above Contact PropertyTo create above contact property, follow the steps:1. In the Geometrical Modeling dialog, reselect Create new property

option.2. Choose from Select Method option Above Contact as Method

option.3. Choose the Contact Level option.4. Make the value of Constant option = -20105. Choose the method to ‘By center of the part of the cell above

contact’ as shown in Fig.14.4.6. Press Apply and OK. See Fig. 14.5.

Fig. 14.4: Geometrical Modeling displayed in a 3D window while the properties are displayed

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Chapter 14 – Property Modeling3D Geological Modeling

Fig. 14.5: Above Contact property generated under the Properties tab in the Model Pane in a 3D window

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