The Development of Wyoming Oil

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The Development of Wyoming Oil Gas Reservoir
Database

• Shaochang Wo

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The Need for A Database of Wyoming Oil Gas
Reservoirs

• Much of the information of Wyoming reservoirs is
  available but has not been collected in a
  database format
• EORI is increasingly receiving inquiries about
  Wyoming reservoirs from both in and out state
  companies
• EORIs own research needs
• It enables quick screening to identify suitable
  EOR methods

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Database Variables (Fields) in Groups

• Field/Reservoir Identification (19)
• Reservoir Description (29)
• Rock Properties (22)
• Fluid Properties (23)
• Cumulative Production (8)
• OOIP Recovery (11)
• Oil Composition (15)
• Trap Type Lithology (9)

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Additional Crude Oil Properties (Jill Buckley)
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Hyperlinked Image Files (Peigui Yin)

• Outcrop
• Core
• Thin Section
• SEM
• XRD
• Outcrop-Core-ThinSection Correlation

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Reservoir Modeling and Simulation

• Tensleep Reservoirs, Wyoming
• Shaochang Wo and Peigui Yin

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Characters of Tensleep Reservoirs

• Bottom (or edge) water driven
• Local compartments
• Often highly fractured
• Mixed wettability
• Large range of oil API gravities
• Decades of production history

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Software and Hardware

• Petrel, GoCad, and Petra
• Eclipse package with BlackOil, Compositional,
  Thermal, and FrontSim models
• Dell and Apple PC workstations
• 15-node HP cluster (Dec. 2006), licensed to run
  the Eclipse Parallel

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Outcrop-based Model
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Petrophysical Facies and Simulation Grids
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Simulated Scenarios

• Water injection versus WAG injection
• Low volume (pressure) injection compared with
  high volume injection
• Changes in injector-producer orientation
• Oils with different API gravities

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Ternary Distribution
2 mon. water 12 mon. WAG
2 mon. water 13 mon. WAG
2 mon. water 12 mon. WAG
2 mon. water 13 mon. WAG
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CO2 Mole Fraction in Oil
2 mon. water 5 mon. WAG
2 mon. water 13 mon. WAG
2 mon. water 48 mon. WAG
2 mon. water 48 mon. WAG 48 mon. water
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