Schlumberger Public Page 1

“Petrel 2010: Customize Native XY units of a

Coordinate Reference System using the

Coordinate System Manager”

Schlumberger Public Page 2

Table of Contents

1. Context .............................................................................................................................................................. 3

2. Creation of a Customized Coordinate Reference System in Petrel .............................................................................. 4

3. Providing access to the Customized CRS to other users ........................................................................................... 10

Settings ................................................................................................................................................................... 10

Conclusions .................................................................................................................................................................. 14

Appendix A – Coordinate System Manager Installation ............................................................................................... 15

Appendix B – Transformation and projection files ........................................................................................................ 16

Reference ..................................................................................................................................................................... 17

Schlumberger Public Page 3

1. Context

In Petrel 2008 and Petrel 2009, the user can customize the surface unit (XY unit) independently of the native surface

unit of the Coordinate Reference System (CRS). In this case, the user used the following Coordinate Reference

System “WGS_1984_UTM_Zone_20N” in which the native surface unit is in Meter and customizing this unit to US

Feet.

Petrel 2010.1 requires the consistency between the surface units (XY unit) and the native surface units of the CRS

from ESRI catalogue and does not allow the customization as in previous version.

The solution for this user case is to customize the CRS in Petrel catalogue to be able to upgrade to the new Petrel

version.

This document describes the procedure to create a customized coordinate system for this specific case:

“WGS_1984_UTM_Zone_20N” with a native surface unit in US Feet.

The next sections of the document are:

Section 2- describes the procedure to create the CRS using the Coordinate System Manager of Petrel 2010.1

Section 3- describes the procedure to give access to other users to use the Customized CRS

Appendix A- presents the installation description of the Coordinate System Manager (CSM)

Appendix B- presents the transformation file and the projection file

Schlumberger Public Page 4

2. Creation of a Customized Coordinate Reference System in Petrel

The coordinate system information provided is described as follows:

Geodetic datum = WGS84

Projection UTM Zone 20

Hemisphere = North

X, Y coordinate units = US feet.

The Coordinate System Manager is a tool that helps geodetic experts to customize an enterprise Petrel Catalog for

Petrel users so that these users can easily find and select the appropriate coordinate reference system for their Petrel

projects. (To install the tool please see Appendix A)

A geodetic expert uses Petrel Coordinate System Manager to manage the following items for the enterprise Petrel

Catalog:

• Coordinate systems (geographic coordinate reference system or projected coordinate reference system)

• Transforms

• WGS84-based coordinate reference systems (default coordinate reference systems and conflation policies)

1. Start Petrel 2010.1 Coordinate System Manager located in Start>Programs>Schlumberger>Petrel 2010>CSM

2. In the lower part of the Coordinate System Manager called “Transforms”.

The Transforms table lists all transforms in the enterprise catalog. Each conflation policy that you create

consists of a coordinate system and a transform that converts it to a WGS84-based coordinate reference system.

The Transforms table allows geodetic experts to manage the transforms used in your conflation policies.

3. Select “Import coordinate system from file” option, as showed in the figure below:

Schlumberger Public Page 5

Figure 1 Import transform file in the Coordinate System Manager

4. In Open File Window, select the file “W84_Transformation.gtf” (See Appendix B, this file was sent with the

report)

Figure 2 Opening the transformation file

5. In the “New Transform” window, type a description. It’s a good practice to have company name to easily

find client customizations. Once done, verify that the transform creation was performed in the “Message

Log” part of the CSM. See Figure 3:

Schlumberger Public Page 6

Figure 3 Creating new Transformation and verifying the action performed

6. In the upper part of the Coordinate System Manager called “Coordinate systems”, select “Import coordinate

system from file” option, as showed in the figure below:

Figure 4 Importing the Coordinate System File

7. In Open File window, select the file “WKT_WGS84_UTM_20_N_Units_US_foot.prj” (See Appendix B, this

file was sent with the report)

8. In the “New coordinate system” window, type a description, to easily find this projection system. See Figure

3 as example:

Schlumberger Public Page 7

Figure 5 Creating a new Coordinate System and verifying the performed action in the CSM

9. Go to the Geodetic catalog tab and select the bottom “Create new conflation policy” to insert a conflation

policy. A conflation policy consists of a coordinate system and a transform that converts it to WGS84.

Figure 6 Creating a new conflation policy in the Geodetic Catalog Tab

10. Enter a name and description for this conflation (they will be exposed in the Petrel interface), use the

descriptions filter to find the previous inserted transformation and CRS. Select the new CRS and the

associated datum transformation:

Schlumberger Public Page 8

Figure 7 Associating the Coordinate System with the Datum Transformation and verifying the performed action

11. Using the same account and workstation open Petrel 2010.1 and in the Coordinate System Units option,

select this new CRS that has XY units in feet.

Figure 8 Selecting the Customized Coordinate Reference System in a Petrel 2010.1 Project

Schlumberger Public Page 9

12. If the Petrel Unit System was in Meter when you selected the new CRS (Native XY units in US Feet), a

message indicating that the consistency will be applied.

Figure 9 Message indicating that the consistency between Surface XY units and the Native XY units of the CRS is

applied

Note: when a Customized Coordinate System is selected for a Petrel project, the full information is contained in the

Petrel Project Configuration Settings. Therefore, any other user with a different account or workstation will have

access to this project and will see the Coordinate System with the Customized CRS without any problem.

Schlumberger Public Page 10

3. Providing access to the Customized CRS to other users

The description and procedures must be carefully done by the Geodesy Specialist Administrator of the Client

Company. This procedure also explains how users can easily import the customized coordinate systems created by

the Geodesy Specialist Administrator.

Settings

Petrel 2010.1 uses 2 files containing geodetic information:

• CoordinateCatalogEnterprise.ctl = list of major coordinate reference system, usually the default Petrel

factory list

• CoordinateCatalogExtensions.ctl = list of additional Coordinate reference system

Users in Petrel access all coordinate systems defined in these two control files, which by default are stored in the

following paths:

%APPDATA%\Schlumberger\Petrel\CRSCatalogConfiguration\2010.1\CoordinateCatalogEnterprise.ctl

%APPDATA%\Schlumberger\Petrel\CRSCatalogConfiguration\2010.1\CoordinateCatalogExtensions.ctl

Where % APPDATA% is a system variable, corresponding to (default):

Windows XP: C:\Documents and Settings\<USER>\Application Data

Windows Vista: C:\Users\<USER>\AppData\Roaming

, and therefore both files are user dependant.

Schlumberger Public Page 11

Figure 10 Geodetic file location in Petrel 2010

The location of the CRS control file, called “Coordinate Catalog Configuration”, is located in Petrel baseline:

D:\Program Files\Schlumberger\Petrel 2010\xml\ CoordinateCatalogConfiguration.xml

Figure 11 Coordinate Catalog Configuration file location in Petrel 2010.1

The Geodesy Specialist has to update the geodetic catalog “CoordinateCatalogExtensions.ctl” using Coordinate

System Manager as explained in Section 2. Then, the Geodesy Specialist will save this file in a disk accessible by

Petrel users.

Schlumberger Public Page 12

The user that needs the additional Coordinate Reference Systems has to open and read the coordinate catalogue

created by the Geodesy Expert. The procedure to import this file is as follows:

1. In Tools> System settings window> Company Profile Tab

2. There are two options:

“Import enterprise coordinate catalog”: the standard catalog will be replaced by the content of the selected

Client_Coordinate file (.ctl).

“Import extension coordinate catalog”: the part of geodetic system extension is replaced by the content of the

selected Client_Coordinate file (.ctl), so added to the standard catalog.

3. Import the Extension coordinate Catalog created by the Geodesy Expert, select “Import extension coordinate

catalog” and from the “Select Extension CRS Catalogue File” window opens the file Client_Coordinate file

(.ctl).

Figure 12 Importing the Coordinate Catalog Extension File in Petrel User Project

4. Petrel Message log will pop up with a successful message.

Figure 13 Petrel Message Log indicating performed action success

Schlumberger Public Page 13

5. Select the Customized Coordinate System from Coordinate & Units tab of Petrel Project Settings.

Using this import option will update the official files as setup in the xml configuration file. The user catalogs (the one

stored locally on user’s computer) are getting synchronized with the corporate one. The user can also work off-line

because they are store locally.

The geodetic expert can make changes on his local extension catalogs and push them over to the network, so the

user’s catalogs are getting updated as soon as they are connecting Petrel with the network.

As result, for any CRS customization of a new User Petrel Project will see the catalog created by Geodesy Expert.

The Geodesy Specialist must be carefully modified the company catalog file and be sure that any Petrel user is

accessing them at the same time.

Schlumberger Public Page 14

Conclusions

A client using a Coordinate Reference System that has Native XY units different of the XY surface units has to create

a Customized Coordinate Reference System.

Petrel 2010.1 requests consistency between the XY surface units and the Native XY units of the Coordinate

Reference System. Petrel 2010.1 has the Coordinate System Manager to customize client’s CRS and provide

appropriate solutions for the reference systems.

The CSM is a tool for managing the coordinate reference systems in the enterprise Petrel catalog. This tool must be

used by Geodesy Experts in the company.

Clients can create a Customized Coordinate Reference System using the Coordinate System Manager following the

procedure described in this document. This and other business units will benefit in the customization of the company

coordinate reference system and be able to upgrade to Petrel 2010.1 while keeping consistency between the units

and the CRS.

Schlumberger Public Page 15

Appendix A – Coordinate System Manager Installation

1. Run Petrel2010setup.exe. The InstallShield Wizard message appears while the Petrel 2010.1 installer is

extracted.

2. Click Next on the Petrel 2010.1 - InstallShield Wizard Welcome panel.

3. Select Modify and click Next.

4. Select Coordinate System Manager and click Next.

This product is for managing the coordinate reference systems in the enterprise Petrel catalog. Refer to the

Petrel Coordinate System Manager online help for information on using this product.

5. Install the Coordinate System Manager.

Schlumberger Public Page 16

Appendix B – Transformation and projection files

FILE “W84_Transformation.gtf”

GEOGTRAN["GEOD_W84_TO_WGS_1984_T1",

GEOGCS["GEOD_W84",DATUM["W84",SPHEROID["W84",6378137.0,298.2572236]],

PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],GEOGCS["GCS_WGS_1984",

DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],

PRIMEM["Greenwich",0.0,AUTHORITY["EPSG",8901]],

UNIT["Degree",0.0174532925199433,AUTHORITY["EPSG",9102]],AUTHORITY["EPSG",4326]],

METHOD["Geocentric_Translation",AUTHORITY["EPSG",9603]],

PARAMETER["X_Axis_Translation",0.0,AUTHORITY["ESRI",100040]],

PARAMETER["Y_Axis_Translation",0.0,AUTHORITY["ESRI",100041]],

PARAMETER["Z_Axis_Translation",0.0,AUTHORITY["ESRI",100042]]]

FILE “WKT_WGS84_UTM_20_N_Units_US_foot.prj”

PROJCS["WGS_1984_UTM_20N_Foot_US",GEOGCS["GEOD_W84",DATUM["W84",

SPHEROID["W84",6378137.0,298.2572236]],

PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],

PROJECTION["Transverse_Mercator",AUTHORITY["ESRI",43006]],

PARAMETER["False_Easting",1640416.667,AUTHORITY["ESRI",100001]],

PARAMETER["False_Northing",0.0,AUTHORITY["ESRI",100002]],

PARAMETER["Central_Meridian",-9.0,AUTHORITY["ESRI",100010]],

PARAMETER["Scale_Factor",0.9996,AUTHORITY["ESRI",100003]],

PARAMETER["Latitude_Of_Origin",0.0,AUTHORITY["ESRI",100021]],

UNIT["Foot_US",0.304800609601219]]

Schlumberger Public Page 17

Reference

− Petrel Help Manual

− Petrel Coordinate System Manager Tool Manual