Proposal to Develop an Improved Methodology for Wellbore...
Transcript of Proposal to Develop an Improved Methodology for Wellbore...
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DEA 161 Proposal to Develop an Improved Methodology for Wellbore Stability
PredictionWill Standifird Senior Vice President Knowledge systems Inc.
March 22, 2007
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Constructing a Stable Wellbore
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Case Study
Anadarko
Deepwater Gulf of Mexico
Development
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West-East Section
Water Depth > 4500’
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Key Challenges
High Inclination > 65°
• Stress anisotropy in inclined hole creating shear stresses
Down-Dip Drilling w/Bedding Planes
• Lower rock strength
Known Hazards in Well Path
• Depleted sand
• Large fault
• Weak rock zones
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Real-Time Wellbore Stability•Field Deployment for 14 days
•Resistivity, GR and Operational Data used for Analysis
•Resistivity | Synthetic DT for RS Correlation
•Mud Weight Adjusted based on Analysis
•No Formation Fluid Influx
•No Drilling Fluid Loss
•No Wellbore Instability
•$9.1M AFE versus $3.2M Actual
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Wellbore Stability Prediction Current Practice
• Not widely practiced, despite the cost of instability problems
• No industry consensus regarding methodologies
• Hard to select which methods to use under varying geologic conditions
• Lack of training
Different Approaches to WBS Modeling
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DEA 161ObjectiveIdentify and develop best practices for wellbore stability analysis
SponsorMarathon Oil Company
ParticipantsFirms actively engaged in drilling or providing drilling services5 participants minimum…15 target
JIP StructurePatterned after prior KSI-managed JIP initiatives (DEA 119 Deepwater Pore Pressure Prediction, Sub-Salt)
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DEA 161 Overview
• Study 5 World Regions
– ~50 wellbore/region
– Utilize public data/no contribution required
• Participants allowed to submit one dataset per enrollment
for confidential analysis (problem well or field)
• Special pricing for larger confidential project submissions
• Technology Enhancements to Geostress
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DEA 161 Deliverables
• Improved methods, models and procedures for the
prognosis of wellbore stability
• Wellbore Stability Prognosis Manual, printed & electronic
• A Wellbore Stability School for drilling engineers, held in
each of the project’s geographic areas
• Database for future research and study to include testing
new models and methods.
• Wellbore Stability website
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DEA 161 Participants
Enrollment Started in February 2007
– Marathon & Pemex enrolled
– Baker Hughes Inteq and Hess imminent
– Considering Proposal
• ~6 NOC’s, ~10 independents & 3 Super-Majors
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DEA 161 Challenges
Super-Major Participation (XOM, BP, Shell or Chevron)
– Many will not join w/o one Super-Major
– Project deliverables are desperately needed by industry
– Domain experts are not the customer for this project
Kick-Off with 5 participants…
– 15 needed for full budget
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For More Information
281.243.4300
www.knowsys.com