M6_Volumetrics

7/25/2019 M6_Volumetrics

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Module 6

Volume Calculations


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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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Make Contacts/Volumetrics

Objectives

Define fluid contacts

Visualize fluid contacts

Create a fluid contact property

Principles of Volume Calculation

Create a new case

Create and use outputs.


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Make Contacts Overview

TheMake contactsprocess facilitates the use of contacts inside a

3D grid. These contacts can be visualized and used for making a

contact property.

Make Contacts Volumetrics


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Make Contacts Process

Make Contacts Tab

Make contacts is the last process under Corner Point Gridding.

1. Append the number of contacts.

2. Define the contact type.

4. Define thecontact level options:

By zones

By regions property

3. Type in a unique contact name.

5. By all zones or segments: Define a contact with a

constant or a surface.

6. Use region property: Regions can be defined using any

discrete property.

5

6 By segments

Fixed for all zones and segments.


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On the Make regions property

tab, regions can be created

using any discrete property.

They also can be modified

using these options:

Merge regions

Add regions from property

Add region from polygon.


Make Regions Property Tab


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Make Regions Property Tab


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Visualize Contacts

2. Click the Styletab under Settingsfor theFluid Contacts folder

to control visualization settings.

1. After running the Make contacts process, the new contact set is stored in aFluid Contacts folder in the 3D grid.

Note: It is possible to convert contacts to surfaces and point sets stored in the Inputpane.


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Make a Contact Property

1. Contacts are stored in a Contact Set folder in the3D grid.

2. Click the Operationstab under Settingsfor the

Contact Set folder to make a property.

3. Select the appropriate fluid codes above/below

contacts and click the Make Property button. The

contact property is stored in the 3D grid >

Propertiesfolder.

4. Use value filter for the property.


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Make Contacts/Volumetrics:

Volume Calculation Objectives

Principles of Volume Calculation

Triangulation and Exact Volume calculation

Cases pane and Results pane,

Create a new case using these inputs:

Contacts and General properties

Oil and Gas properties

Filters and well boundaries,

Create and use outputs

Volume properties Reports

Volume maps.


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Volume Calculations

Data you can use:

Boundary, license block

Zones, Segments

Properties (Net/Gross, porosity, Sw)

Constants (Bo, Bg, Rs, Rv)

Contacts (GOC, OWC, GWC)

Recovery factors (REC).

The Volume calculationprocess accurately calculates the various volumes

(bulk, pore, and fluid) in a 3D grid.

Exact volume calculation

Each side of the cell is triangulated. Cells are split exactly where they are cut.


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Generating Cases and Results

Cases Pane

Running a volume calculation creates a case,which will

have a volume case icon in the Casespane. This must

be toggled for viewing results stored in the Results

pane.

Results Pane

Acts as a filter for outputs of the Volume Calculation.

Standard parameters are calculated for all volumecalculations if the appropriate input is supplied.

Note:Simulation cases also are stored in the Casesand Results panes.


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Calculate Volumes in a 3D Grid (1)

2. Create a new case or update an existing one.

3. Choose a 3D grid (from the drop-down list) on which you will run

the Volume calculation.

4. Define the Hydrocarbon intervals to use. Choose contacts from

the Fluid Contacts folder and drop them using the Blue arrow.

First, define one consistent representation of reality - a case.

The Propertiestab holds all the input data for the volume calculation.

1. Double-click on the Volume calculation process.

5. Browse through the Propertytabs and choose either a property

model or a constant for each input.

7. Click Applyto store,then click Run.

6. Specify the outputs to generate in the Settingstab.


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Specify the Properties for the Case

5.1 Define Oil and Gas properties. Use either an

existing property (drop-down list) from the grid or

select the Constant propertybox and enter a value.

5.2 On the General Propertiestab, activate N/G and

Porosity properties or use constants.

Choose a constant value or a property from a drop-down list of the

appropriate properties (template dependent) in the chosen 3D grid.

5.1

5.2


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Specify the Results of a Volumetric Case

6.1 Choose to create a 3D property.

The Settingstab controls the outputs that will be created and allows you

to create extra filters for separating results.

6.2 Create a volume height map of any of the parameters.

6.3 Output the results to a spreadsheet.

Note: When Volume calculationis run, the

properties are stored in the Properties folder

of the selected grid and the maps are stored in

a Volume Maps folder in theInput pane.


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Filters in the Volume Calculation Results

. Specify a discrete Facies property. This allows you to

categorize the volume results into various rock types

modeled in the 3D grid

2. Use the property filter in the volume calculation or filter

the volume calculations based on polygons:

a. Boundary polygons (drop from the Input pane

using the blue arrow)

b. Well boundaries (specify the influence radius)


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Generate a Report

1. Filter settings are stored in the Results

pane. Right-click on the Volumetricfolder

> Settings.

2. Choose the Propertiesto display in the

report.

4. Specify the Detail level on the Formattab.

5. Click Make Report.

6. View the report and copy or save it

to a text editor.

3. Choose single/multiple cases.


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Change Units in the Report

1. Go to the Volume templates folder

in the Templatespane.

2. Open the Settings of any of the

templates (here: STOIIP).

4. Check Customizenext to the units.

Choose the units and set the

number of decimals to use.

3. Click the Infotab.

5. Click Apply. Generate a report

again: Click the Resultstab and

open the Settings for Volumetrics.


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Visualize the Output: Volume Maps

Volume Mapsare stored in the Inputpane.

1. Maps can be displayed in a Map window (e.g., STOIIP).

2. Volume maps also can be shown in a 3D window

draped over a topographic surface.

a. Output a depth Surface from Horizon.

b. Right-click and select Copythe STOIIP map as a

surface attribute.

c. Right-click and paste it onto the depth surface.

d. Expand the surface and choose the attribute to

visualize.


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EXERCISE

M6_Volumetrics

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