spe workshop surface and wellbore positioning errors ... · surface and wellbore positioning errors...

Surface and Wellbore Positioning Errors Impact Subsurface Models and Reservoir Estimates – How Much and How Seriously?


SPE WORKSHOP

ChairpersonJohn de Wardt

DE WARDT AND COMPANY

Ton Loermans Consultant

Carol Mann Dynamic Graphics, Inc.

Steve Mullin Gyrodata Inc.

Jon Stigant Stigant Enterprises

Edward Stockhausen Chevron

Robert Wylie National Oilwell Varco

Known wellbore position and surface location uncertainties are routinely being ignored in the development of subsurface models leading to unnecessary errors in both the models themselves and the reserves volumes they are expected to contain. Subsurface models can only function optimally when all the input uncertainties are known and understood across the organization. This groundbreaking workshop is designed to bring together engineers, petrophysicists, and geoscientists to understand the size and scale of this issue and develop a way forward to enlighten the industry.

Petrophysical and pressure data are located in three-dimensional models using surface and borehole position surveys. These subsurface geological and reservoir models often contain significant false assumptions about data position uncertainties. While position uncertainties may have little impact on the early exploration stages of an asset life cycle, the understanding of a reservoir can be seriously impacted as the field development matures. There are cases in which this has led to subsurface models significantly impacting the accuracy of reserves estimates as well as the commercial viability of the wells positioned within these models.

A key input to subsurface models is the vertical and lateral position of the wellbores and points at which formation data were acquired in those wellbores. Wellbore positional data contain known uncertainties calculated from well-understood science of the measurement systems. These uncertainties are often not taken into account when building the subsurface reservoir models. This data is exchanged between drilling and subsurface departments in a manner that frequently is poorly managed without including the uncertainty attributes.

COMMITTEE MEMBERS

12 November 2015 The San Luis Resort | Galveston, Texas, USA

11 November ReceptionSPONSORED BY


TECHNICAL AGENDA WEDNESDAY, 11 NOVEMBER 1730–1900 | Welcome Reception

Conferee Lounge

THURSDAY, 12 NOVEMBER All technical sessions are located in Grand Ballroom A/B.

0730–0830 | Registration and Continental Breakfast Grand Ballroom Foyer

0830–0845 | Chairperson’s Welcome and Keynote Address

0845–1015 | Session 1: Locating Data in Three Dimensional Space - It iIs Not Where You Think It Is

Session Chairs: Jon Stigant, Stigant Enterprises Ton Loermans, Consultant

n Presentation 1: It’s 10:30 a.m., Do You Know Where Your Well Locations Are? John Conner

n Presentation 2: Quantifying Survey Accuracy – Understanding and Using Error Models Adrián Ledroz, Gyrodata Inc.

n Presentation 3: Why Drillers Should Be Better Suppliers of True Along Hole Depth Than Petrophysicists Ton Loermans, Consultant

1015–1045 | Coffee Break Grand Ballroom Foyer

1045–1215 | Session 2: Correlating Wellbore Data for Subsurface Models - Uncertainties Driven by Errors

Session Chairs: Carol Mann, Dynamic Graphics, Inc. Steve Mullin, Gyrodata Inc.

n Presentation 1: Borehole Uncertainty Factors and Consequential Geologic Modeling EffectsMerrick Mainster, Apache Corporation

n Presentation 2: Reservoir Pressures - Defining the Volume Metrics Ed Stockhausen, Chevron

n Presentation 3: Geomatics and Well Survey Uncertainties – Reserve Considerations Dan Diluzio, Shell

1215–1330 | Luncheon Presentation: The Mars Climate Orbiter – What We Might Learn From NASA About Improving After Mishaps Grand Ballroom A/B

1345–1515 | Session 3: Panel Debate - Understanding the Scale of Uncertainty Impact From Survey Errors

Session Chairs: John de Wardt, DE WARDT AND COMPANY Robert Wylie, National Oilwell Varco

This cross-disciplinary panel session will debate the connection of the wellbore survey errors to the subsurface model. The understanding this panel creates will determine the scale of the issue and the necessity to improve industry practices. This will be a unique opportunity for the full spectrum of disciplines to understand the input and output effects of survey uncertainty.

1515-1530 | Coffee Break Grand Ballroom Foyer

1345–1515 | Session 4: Forward Progression - What Should Happen Next?

Session Chairs: John de Wardt, DE WARDT AND COMPANY Ton Loermans, Consultant Carol Mann, Dynamic Graphics, Inc. Steve Mullin, Gyrodata Inc. Jon Stigant, Stigant Enterprises Edward Stockhausen, Chevron Robert Wylie, National Oilwell Varco

All attendees will be actively engaged in a process to draw conclusions and develop cross-discipline industry initiatives where appropriate. All of the input from previous sessions will be considered to maximize the opportunity to generate value. All pertinent content from the entire workshop will be captured for assimilation into a summary report for release to participants.


12 November 2015 The San Luis Resort | Galveston, Texas, USA

NOTES: _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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GENERAL INFORMATION

About Society of Petroleum EngineersThe Society of Petroleum Engineers (SPE) is a not-for-profit professional association for members engaging in oil and gas E&P, providing resources for technical knowledge. Income from this event will be invested back into SPE to support many other member programs. Scholarships, certification, the Distinguished Lecturer program, and SPE’s energy education program Energy4me are just a few examples.

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spe workshop surface and wellbore positioning errors ... · surface and wellbore positioning errors...

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