improving 101100110101 location accuracy...…the business driven standard improving location...

… the business driven standard

Improving

Location Accuracy

Update on migrating to NAD 83

and to a newer survey grid version

101100110101

PPDM AssociationData Management ConferenceNovember 1st and 2nd 2006

Yogi Schulz

Copyright 2006, PPDM Association. All Rights Reserved2

Yogi Schulz

Biography

� President of Corvelle Management Consultants

� Information technology related management consulting

� Project management and systems development

� Computing Canada & Calgary Herald columnist

� PPDM Association board member

� Industry presenter:

• Project World - 4 years

• CIPS Informatics - 7 years

• PMI Information Systems SIG - 2 years

• Convergence - 4 years

• PPDM Association - several years

Management Consultants


Presentation

Outline

� Quick introduction to:

• surveying, datums andco-ordinate reference systems

• DLS survey grid

� Background to the potential problem

� Strategies for improving location accuracy

� Benefits & Risks

� Conclusions & Recommendations

� Questions & Discussion

Bernie needs constant reassurance


A Quick Overview

of Survey Datum History

NAD 27

NAD 83

WGS 84

Canadian Federal Government

Completed NAD 83 implementation in 1996

Best fit for

North America

Best fit for

the whole world

Implemented as


NAD 27 to NAD 83 Differences

60 – 90 meters

0 – 25 meters


NAD 27 to NAD 83 Differences


NAD 27 to NAD 83 Difference Impact

Lat/Long shift72.49 meters

UTM Easting/Northing shift

227.98 meters

Calgary Tower moves

on a map if location data

is not migrated


Calgary

Edmonton

Why is this important?

� 99% of GPS surveys

are based on ASCM� ASCM = ATS 4.1

10 - 40 m

ATS 4.1 DLS Survey Grid Differences

8

ATS 2.2 vs. 4.1


DLS Grid Version Difference Impact

DLS Grid ATS 4.1 vs ATS 2.2 Difference > 40 m

Grid

Culture

Land

Seismic

Pipelines

Wells

Location risk increasesas exploration targets become smaller

+200 m

�

-75 m

�

�

30 m

Impact of Geospatial Data Discrepancies

1 Bin Grid20-30 m


Project Drivers

� Minimize risk of producing maps with multiple

datums & survey grid versions unknowingly

� Respond to new data submission and

distribution requirements of regulatory

agencies

� Implement CAPP recommendation to:

• Interchange data using NAD 83 in 2Q 2008

• Upgrade to the new DLS survey grid version

� Recognize that all new survey data is being

acquired and delivered using NAD 83

Growing momentum for oil & gas industry

to move forward


Migrating to a new datum

& to a new survey grid version

Current combination:

� NAD 27

� ATS 2.2 or ATS 2.6

� STS 1.0 or STS 2.5

� MAN 1.0

� PRB 1.0

New combination:

� NAD 83

� ATS 4.1

� STS 2.5

� MAN 1.0

� PRB 1.0

PPDM modules

support move to new combination


Strategies for Migrating to NAD 83

and a new DLS survey grid version

� Do nothing

� Use either current or new combination

on a product-by-product basis

� Use either current or new combination

on a project-by-project basis

� Continue to use current combination

throughout the company

� One-time data migration of current to new

combination throughout the company

Lowest risk approach requires use

of a single combination company-wide


One-time data migration

Scope Choices

� Upgrade DLS version

� Corporate PPDM databases

� SEG P1 database(s)

� All active project datastores

� Project datastores with

anticipated longevity

� Inactive projects

� Legacy data:

• Reels of seismic SEG Y data

• Printed & Mylar maps

Increasing

Cost

Complexity

Schedule

Benefit


Project Benefits

Risk Reduction

� Ongoing confirmation of the actual datum &

survey grid version creates risk of error

� The errors can lead to:

• Misplaced wells that miss their reservoir targets

• Missed exploration opportunities through

misinterpretation


Project Benefits

Effort Reduction

� The project benefits include reduced:

• Confusion about datums

• Confusion about survey grid versions

• Data management effort

• Data conversion effort

Value of the benefits

relative to cost

of data migration project

is subject to challengeGreen grid is NAD 27

Gray grid is NAD 83


Project

Risks

� Data quality inadequacies

complexifying the data migration

� Expectation that data migration

will fix bumps in the G & G workflow

� Under-estimating impact of data migration on:

• Computing environment: Applications, Data

• End-user training

� Data not available in new combination from

data vendors

� Applications from software vendors not ready

to support new combination


Conclusions

� Migration projects respond to trend of

widening use of new combination in the

oil & gas industry

� Migration projects position companies for

survey requirements of unconventional

production projects

� Every company will have to address the data

migration sooner or later

Data migration projects

pay for themselves with one dry hole


Recommendations

� Build datum & survey grid awareness

through education

� Use PPDM to manage the data migration

to the new combination

� Participate in the NAD 83 best practices

workgroup

Collaboration will:

- Improve quality of deliverables

- Reduce costs through sharing


Questions &

Discussion

Can you helpdata managers?

Please

fill out

evaluation

form


1800, 250 - 6th Ave. S.W.Calgary, Alberta Canada T2P 3H7

Telephone: (403) 249-5255E-mail: [email protected]

Web: www.corvelle.com

Information technology related management consulting

Project management and systems development

Computing Canada & Calgary Herald columnist

PPDM Association board member

Improving Location Accuracy

Management Consultants


Likely Software List

required by all energy companies

� PPDM datastore migration *

� Project datastore migration for:

• Landmark OpenWorks

• Paradigm SeisX

• Schlumberger GeoFrame and Petrel

• Zokero SeisWare

� Sequential file data migration

� SEG P1 * & SEG Y data migration

� GIS SDE layer migration

* May be handled by data management vendor

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