EORI Geologic Component

1
EORI Geologic Component

• Reservoir Characterization
• for Reservoir Modeling,
• Simulation, and EOR Practice
• Peigui Yin

2
Reservoir Characterization

• Reservoir heterogeneity caused by
  post-depositional diagenesis.
• Cementation, dissolution, and diagenetic history.
• Petrophysical properties.
• Porosity, permeability, relative permeability,
  saturation, and capillary pressure.
• Characterization of Rock Properties.
• Mineral, chemical, and pore network.

3
Is a reservoir like this?
4
Reservoir and Barriers
A Dolomite
A Sandstone
B Dolomite
B Sandstone
C Dolomite
Tensleep sandstone reservoir in Wyoming.
5
Reservoir Heterogeneity
Caused by depositional structure
Caused by diagenetic modification
Tensleep sandstone in Wyoming (modified from
Dunn, 1995).
6
Cementation in Tensleep Sandstones
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Heterogeneity in Tensleep Sandstones
A Ss
B Ss
Porosity
Permeability
Marine Carbonate
Detrital Dolomite
Anhydrite/Gypsum
Eolian Sandstone
Evaporative Lagoon or Sabkha
8
Frontier Reservoir Sandstones in Wyoming
Outcrop
Simulation
From Dutton et al., 2002.
9
Reservoir Characterization

• Reservoir heterogeneity caused by
  post-depositional diagenesis.
• Cementation, dissolution, and diagenetic history.
• Petrophysical properties.
• Porosity, permeability, relative permeability,
  saturation, and capillary pressure.
• Characterization of Rock Properties.
• Mineral, chemical, and pore network.

10
Tensleep/Minnelusa Sandstone in Wyoming
11
Frontier Sandstones in Wyoming
12
Muddy Sandstones in Wyoming
13
Almond Sandstones in Wyoming
14
Reservoir Characterization

• Reservoir heterogeneity caused by
  post-depositional diagenesis.
• Cementation, dissolution, and diagenetic history.
• Petrophysical properties.
• Porosity, permeability, relative permeability,
  saturation, and capillary pressure.
• Characterization of Rock Properties.
• Mineral, chemical, and pore network.

15
Characterization of Minerals
62.5 m
62.5 m
width293 m
width88 m
16
Characterization of CEC and Surface Areas
Width 0.125 mm
Width 3.3 mm
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Characterization of Fluid Distribution
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Characterization of Pore Network
Micro X-ray CT Image
Courtesy of Mark Knackstedt Australia National
University, Canberra