m4 2 pillar gridding

7/25/2019 M4 2 Pillar Gridding

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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

m4 2 pillar gridding

Documents