Benefits of Capturing Geopressure and Geomechanical DataInformationKnowledge in an NDR

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Benefits of Capturing Geopressure and
Geomechanical Data/Information/Knowledge in an
NDR

• Cary Purdy

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Is this a database problem?!
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Outline

• NPT
• Cost of NPT
• Major causes of NPT
• Can we do anything about it?

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Non-Productive Time (NPT)

• stuck pipe
• lost circulation
• well control
• tool failures
• rig downtime
• wellbore instability
• sloughing shales
• Kick
• flows

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Direct Financial Cost of NPT

• Forty-one percent of non-productive drilling time
  is caused by wellbore instability and pore
  pressure problems. (10 year, several hundred well
  GOM study by Dodson, published in 2004)
• Problems in these areas are estimated to cost the
  industry 8 billion (USD) per year.

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8 Billion (USD) in Perspective

• gt 2 times GNP of Malta
• Total non-oil exports for Iran in 2003
• Money spent yearly in the US on cosmetics
• David Archers bar tab from last POSC meeting

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Indirect Cost of NPT

• Human Impact
• causalities, real or perceived,
• real or perceived public safety concern,
• public disruption (evacuations, closed roads,
  railroads, air traffic)
• Environmental damage, wild life casualties.
• Asset Loss
• Loss of rig
• loss of high cost well
• large loss of hydrocarbons
• irrecoverable damage to reservoir

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Indirect Cost of NPT

• Business disruptions
• Reallocation of resources (human and material)
• domino business disruptions,
• loss of sales, contract problems
• litigation
• drop in stock value
• cash flow disruptions
• Public Image Impact
• local government problems
• real or perceived liability claims

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What Causes Wellbore Instability and Pore
Pressure Problems?

• high tectonic stresses
• chemical interaction with the drilling fluid
• Incorrect mud weight (imbalance of annular
  pressure with formation pressure)

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Is it Reasonable to Expect to Eliminate NPT Due
to Wellbore Instability and Pore Pressure?

• Better data
• Better data handling
• Better data filtering
• Improved processes
• Improved communication between domains and domain
  experts
• Right information at the right time

Better data/information/knowledge capture
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In general, necessary information and knowledge
is not retained

• Not sure what to capture
• it is not standard
• Important to capture the good news with the bad
• People dont want to publish their mistakes
• Oil Companies
• Drilling is a competitive advantage (real or
  perceived)
• Service Companies
• Lack of business case the market is not large
  enough
• Diminished service revenue
• NDRs
• Uneasy to require oil companies to give away
  their competitive advantage (real or perceived)
• Interpretations vs. data

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Getting Unstuck (pun intended)

• Define the types of data necessary and make those
  mandatory
• Add necessary elements to the NDR data model
• Standardize interpretation practices
• Calibration data (e.g., lot, dst, rft, mdt, etc.)
• Pore Pressure, Fracture Pressure, Overburden
  Gradient, Seal Failure Gradient
• Eliminate the perceived competitive advantage
• In new areas, all operators are starting from
  scratch
• Require Pore Pressure Analysis, cost of which is
  recoverable against production revenues (Specify
  what analysis should include or how it should be
  done)
• Share Geopressure and Geomechanics information so
  that all operators are working with the same
  information
• Post/Share results of regional studies

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Summary
8 Billion USD is a lot of money!
(Maybe David Archer drinks too much?)
Improved safety
Improved public image
Reduced NPT could translate to 10 20 more
wells for the same cost
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Hey! It IS a database problem!!