Field guide to Muddy Formation outcrops, Crook County, Wyoming

Rawn-Schatzinger, Viola

doi:10.2172/10108850

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…An important component of the research project was to use information from outcrop exposurea of the producing formations to study the spatial variations of reserwfir properties and the degree to which outcrop information can be used in the construction of reservoir models. A report similar to this one presents the Muddy Formation outcrtop data and analyses performed in the course of this study (Rawn-Schatzinger, 1993).…”

Section: Introductionmentioning

confidence: 65%

Data from selected Almond Formation outcrops -- Sweetwater County, Wyoming

Jackson¹,

Rawn-Schatzinger²

1993

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Section: Introductionmentioning

confidence: 65%

Data from selected Almond Formation outcrops -- Sweetwater County, Wyoming

Jackson¹,

Rawn-Schatzinger²

1993

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Overview of the Bell Creek Combined CO2 Storage and CO2 Enhanced Oil Recovery Project

et al. 2013

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Modeling 3D porosity and permeability from GPR data in the Ellenburger Dolomite, central Texas

Harbi

McMechan

2011

GEOPHYSICS

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Three-dimensional porosity and permeability were modeled in an Ellenburger carbonate reservoir analog from 2D crosshole and 3D surface survey ground-penetrating radar (GPR) data. Two-dimensional GPR crosshole velocity tomography, 3D migration of the GPR surface data, and porosity and permeability calibration to GPR attributes results in 3D porosity and permeability predictions that provide a consistent model of the paleocave structures and facies distributions. Picking the maximum instantaneous amplitude of the direct arrival wavelet for velocity tomography reduces uncertainties caused by a low signal-to-noise ratio, uncorrelated noise, and the interference between reflections and critical refractions at the earth/air interface. The GPR velocity is anisotropic with an average vertical to horizontal velocity ratio of 0.93, which is attributed to the dominance of the relatively horizontal orientation of the maximum porosity and permeability. Porosity and permeability trends are influenced by regional northeast-southwest and northwest-southeast striking conjugate fractures associated with the Pennsylvanian Ouachita orogeny and breccia facies generated by three episodes of burial and the resulting paleocave collapses. At depths [Formula: see text] from the present surface, large brecciated dolomite and limestone blocks have low porosity and low permeability. Between a depth of [Formula: see text] and [Formula: see text] irregular fracture orientations and distributions associated with collapse breccias have a higher average porosity and permeability. A deeper zone ([Formula: see text] to [Formula: see text] in depth), has intermediate permeability and porosity. Porosity and permeability could not be calibrated in open voids. Thus, the predictions are applicable to the core-scale to which they were calibrated, but are lower bounds for the whole volume, which contains breccias, karst, and fractures that increase both porosity and permeability at larger scales.

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Field guide to Muddy Formation outcrops, Crook County, Wyoming

Cited by 3 publications

References 3 publications

Data from selected Almond Formation outcrops -- Sweetwater County, Wyoming

Data from selected Almond Formation outcrops -- Sweetwater County, Wyoming

Overview of the Bell Creek Combined CO2 Storage and CO2 Enhanced Oil Recovery Project

Modeling 3D porosity and permeability from GPR data in the Ellenburger Dolomite, central Texas

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