--> Abstract: Depth Relationships in Porosity and Permeability in the Mount Simon Sandstone of the Midwest Region: Applications for Carbon Sequestration, by Cristian R. Medina, David A. Barnes, and John A. Rupp; #90084 (2008)
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Depth Relationships in Previous HitPorosityNext Hit and Previous HitPermeabilityNext Hit in the Mount Simon Previous HitSandstoneNext Hit of the Midwest Region: Applications for Carbon Sequestration

Cristian R. Medina1, David A. Barnes2, and John A. Rupp1
1Indiana Geological Survey, Bloomington, IN
2Western Michigan University, Kalamazoo, MI

A comparison of Previous HitporosityNext Hit and Previous HitpermeabilityNext Hit values (conventional core analyses data) from the Upper Cambrian Mount Simon Previous HitSandstoneNext Hit indicate a predictable relationship with depth owing to diagenetic changes in the pore structure. This predictive relationship is useful for evaluating and quantifying the geological carbon sequestration capacity in Indiana and Michigan. Image analyses of thin sections and Previous HitporosityNext Hit logs from wells in the study area provide additional sources of petrophysical data. The regional trend of decreasing Previous HitporosityNext Hit with depth is described by the equation: φ (d) = 12,789,166 * d-2.1978, where φ equals Previous HitporosityNext Hit and d is depth in feet. This equation indicates that Previous HitporosityNext Hit typically falls below 5 percent below 7,000 ft. The correlation between burial depth and Previous HitporosityNext Hit is useful for Previous HitpredictionNext Hit of the petrophysical character of the Mount Simon in more deeply buried and largely undrilled portions of the basins. Understanding the relationship between Previous HitporosityNext Hit, Previous HitpermeabilityNext Hit, and depth also provides information that can be used in numerical models that simulate supercritical carbon dioxide flow within the Mount Simon. The fundamental relationship of decreasing Previous HitporosityNext Hit and Previous HitpermeabilityNext Hit with depth generally holds true on a basinwide scale, but localized stratigraphic and areal variations in sedimentary facies also affect reservoir quality of the unit such that, in some areas, a reversal in the Previous HitporosityTop/depth relationship is observed. Careful documentation of the mineralogical and sedimentological characteristics of the reservoir are critical to successfully predict the petrophysical attributes of deep saline aquifer systems and how they will perform at a given locality. This work is part of the regional carbon sequestration assessment being conducted by the MRCSP.

Presented AAPG Eastern Section Meeting, Pittsburgh, Pennsylvania 2008 © AAPG Eastern Section