8. Geometrical Property Modeling

Geometrical 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. 8.1 Creating a Bulk Volume Property

To create a bulk volume property, follow the steps:

• Choose Property Modeling item from Process Diagram, • Double click on the Geometrical Modeling process, • A Geometrical Modeling with ‘HAH/3D Grid’ window pops up, • Select Create new property option, see Fig. 8.1, • Change the Select Method option to use for generating the new property to

Cell Volume Method, • From Property template choose the template to use for the new property in this

case use Bulk Volume as property tamplate, as shown Fig. 8.2, • Press Apply, • Click OK. See Fig. 8.3

Fig. 8.1: The Geometrical Modeling with ‘HAH/3D Grid’ dialog box

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Fig. 8.2: Th dialog box e Geometrical Modeling with ‘HAH/3D Grid’

Fig. 8.3: 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 Project Explorer

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8.2 Creating Above Contact Property

To create above contact property, follow the steps:

• In the Geometrical Modeling dialog, reselect Create new property option, • Choose from Select Method option Above Contact as Method option, • Choose the Contact Level option, • Make the value of Constant option = -2010, • Choose the method to ‘By center of the part of the cell above contact’ as

shown in Fig. 8.4. • Press Apply and OK. See Fig. 8.5.

Fig. 8.4: Geometrical Mod

displayed eling displayed in a 3D window while the properties are

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Fig. 8.5: Above Contact property generated under the Properties tab in the Project Explorer in a 3D window

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