Coring%20Recovering%20rock%20samples%20for:

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CoringRecovering rock samples for

• Delineate rock strata types and composition
• Clays
• Cementation
• Grain relationships
• Mineralogy
• Identify sedimentary structures and texture
• Identify deposition environments to aid
  mapping, and predict reservoir geometry and
  likely areal extent
• Determine porosity and permeability
• Identify presence of reservoir fluids

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Rotary core barrel
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Coring bits are commonly 1.75 to 5.25 inches in
diameter
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Diamond insets on rotary coring bit. The insets
may also be tungsten carbide or PDC
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top
top
bottom
bottom
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Percussion Sidewall Coring gun
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Sidetrack coring system
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Rotary sidewall tool
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Coring protocols
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• Core 3880 and 388 Assignment
• February 18 2009
• Final core description should be typed with two
  columns Core depth, and Description (as
  indicated below).
• 1. Describe both cores using the standard
  protocols
• ? rock type
• ? color
• ? texture
• ? fossils/trace fossils
• ? sedimentary structures
• ? porosity (estimate it)
• ? oil shows
• 2. Identify the principal depositional
  environment (s) of the cored interval in both
  cores. Do this by identifying the principal
  facies i.e. - the distinctive rock types that
  broadly correspond to a certain environment or
  mode or origin (channel facies, marine bar
  facies, tidal facies, open marine facies,
  turbidite facies, etc).
• Interpret the most likely areal distribution
  pattern of each reservoir facies in both cores.
  Use terms like areally extensive, blanket-like,
  narrow, elongate, lobate, etc.