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Module 4
3D Grid Construction
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Petrel Workflow Tools
3D Grid
Construction
Structural Gridding
Stratigraphic
Modeling
Pillar Gridding
Well Log
Upscale
Facies &
Petrophysical
Modeling
Make contacts &
Volume Calculation
IntrotoPetrel
Interface
Workflow
Editor
Property Modeling
Make HorizonsZones & Layering
3D Grid Construction: Structural Modeling
Studio
3D Grid
Construction
Structural
Framework
Fault Modeling
Introduction Surfaces and
Data edit
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Pillar Gridding
Objectives
Understand Basic Terminology/ Concepts Boundaries
Segments
Directions
Trends.
Define the process of Pillar gridding Define boundaries
Settings tab
Set directions and trends
Define segments
Refining grid.
Discuss Editing Options: Edit the fault model
QC of Skeletons: Intersections and segments
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Processes used for 3D Grid Construction
3D Grid Construction
Structural FrameworkCorner Point Gridding
Fault Framework
Modeling
Fault Modeling
Structural Gridding
Make Horizons/Zones/Layers
Fault Framework Modeling
Horizon Modeling
Make Simple Grid
Structural Gridding
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Pillar Gridding Process
Fault modeling Pillar Gridding Make Horizons Make Zones Layering
Structural Modeling
Based on the previously generated key
pillars, normal pillars are now established
throughout the reservoir from set
parameters including, e.g., the boundary
and grid increment.Preview skeleton based on
mid-points of Key pillars
Output skeletons established from top,
mid, and base points of the key pillars
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Pillar Gridding Process
Fault modeling Pillar Gridding Make Horizons Make Zones Layering
Structural Modeling
Based on the previously generated
key pillars, normal pillars are now
established throughout the reservoir
from set parameters including,
e.g., the boundary and grid increment. Preview skeleton based onmid-points of Key pillars
Output skeletons established from top,
mid, and base points of the key pillars
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Overview
Pillars:Lines that define the corners of 3D
cells. In the Pillar gridding process, they are
still virtual until the process is completed.
Pillars
Pillars+
Edges
Pillars
+Edges
+
Base & Top
=
Cells
Note: This illustrates the concepts of cells but skeletons do not define
physical cells yet .
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Terminology
Boundary
Polygon, boundary segment ,or part of
boundary.
Trends
Guidance for the grid cell shape andorientation. Can be used as segment divider
where there are no faults.
Directions
Guidance for orientation of cells along faults.
Segments
Faulted compartment closed by faults and/or
trends and/or grid boundary.
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Directions and Trends
I-direction
I-trend
J-Trend
J-direction
Arbitrary
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1. Start the Pillar gridding process.
2. Define the boundary.
3. Define grid name and increment.
4. Build mid-skeleton grid and click
Apply.
5. Tune mid-skeleton grid.
6. Extend pillars to top and base
skeletons and click OK.
Workflow: Pillar Gridding
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Results/QC
After clicking OKin the Pillar Gridding dialog,Petrel generates a new 3D grid in the Models
pane containing three skeleton grids.
To QC the skeleton grid, use the Intersections
found under the Intersections folder. Highlight
one of the intersections, toggle ON ShowPillars and use the Grid player to move in
the I or J direction to look for poorly truncated
pillars or spikes in the skeleton grid.
Top skeleton
Mid skeleton
Base skeleton
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Segments
2. Check segments: Use the Segment Filter to select on/off or
make a visual display of segments as a legend by right-clicking
on the Segment filter, selecting Insert/update template, and
toggling it ON from the Templatespane.
1. Change the style settings for the skeleton: Double-click on theSkeletonfolder and on the Styletab, Solidsubtab, select
Show Solid: As Segments.
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EXERCISE