Improving Location Accuracy

Transcript Improving Location Accuracy

Improving Location Accuracy

Update on migrating to NAD 83 and to a newer survey grid version

Yogi Schulz

101100110101

Yogi Schulz Biography

Management Consultants

2       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

3 Presentation Outline  Quick introduction to: • surveying, datums and co-ordinate reference systems • DLS survey grid      Background to the problem/opportunity Strategies for improving location accuracy Benefits & Risks Conclusions & Recommendations Questions & Discussion Bernie needs constant reassurance

A Quick Overview of Survey Datum History

NAD 27

Best fit for North America

WGS 84

Best fit for the whole world Implemented as

NAD 83

Canadian Federal Government Completed NAD 83 implementation in 1996

5 NAD 27 to NAD 83 Differences

6 NAD 27 to NAD 83 Difference Impact UTM Easting/Northing shift 227.98 meters Lat/Long shift 72.49 meters

Calgary Tower moves on a map if location data is not migrated

7 ATS 4.1 DLS Survey Grid Differences Edmonton Why is this important?

  99% of GPS surveys are based on ASCM ASCM = ATS 4.1

Calgary ATS 2.2 vs. 4.1

10 - 40 m 7

8 DLS Grid Version Difference Impact

DLS Grid ATS 4.1 vs ATS 2.2 Difference > 40 m

Impact of Geospatial Data Discrepancies Wells Pipelines +200 m  Seismic -75 m Land   Culture 30 m Grid

1 Bin Grid 20-30 m Location risk increases as exploration targets become smaller

Project Drivers  Minimize risk of producing maps with multiple datums & survey grid versions unknowingly    Implement CAPP recommendation to: Recognize that all new survey data is being acquired and delivered using NAD 83  Respond to new data submission and distribution requirements of regulatory agencies Opportunity to improve the G&G data management environment 10

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 & some software packages

support move to new combination

12 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

13 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

14 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

15 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 challenge Green grid is NAD 27 Gray grid is NAD 83

16 Project Risks  Data quality inadequacies will complexify the data migration   Under-estimating impact of data migration on: • • Computing environment: Applications, Data End-user training  Data not available in new combination from data vendors  Expectation that data migration will fix bumps in the G & G workflow Applications from software vendors not ready to support new combination

17 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 18 Collaboration will: - Improve quality of deliverables - Reduce costs through sharing

19 Please fill out evaluation form Can you help explorationists?

Questions & Discussion