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Reservoir Compartmentalization of the Rose Run Previous HitSandstoneNext Hit (Upper Cambrian) in Eastern Ohio

Mihir Pradip Shah and James E. Evans
Department of Geology, Bowling Green State University, Bowling Green, Ohio, 43403 United States
[email protected]

This study is focused on the sedimentology, stratigraphy, and architecture of the Rose Run Previous HitSandstoneNext Hit (RRS) in eastern Ohio. This unit is a potential petroleum reservoir and has been recently considered as a potential reservoir for CO2 sequestration.

The goal is to evaluate reservoir compartmentalization in the RRS on various scales. To understand compartmentalization at field scale, a geophysical log model will be utilized to make Isopach, Sand-Isolith and Structure contour maps Previous HitfromNext Hit around 25 wells located in eastern Ohio. Geophysical log modeling will help bring out trapping mechanisms, depositional trends, facies distribution, and geometry of individual sand units within the RRS in the study area. Small-scale compartmentalization will be evaluated by carrying out microfacies analysis Previous HitfromNext Hit thin sections to understand heterogeneity of the RRS by investigating their textural, mineralogical and diagenetic history. Cathodoluminescence will be used to identify cement types. Thin section study will also involve porosity Previous HitestimationNext Hit and mineral composition using point counting method.

Preliminary results Previous HitfromNext Hit 4 cores suggest micro-scale compartmentalization in the RRS is controlled by variation in dolomite cements and by clay content, which influences porosity and Previous HitpermeabilityTop. Interlaminated clay/mud baffles are common small-scale features. Textural and mineralogical variability caused by different grain size may influence reservoir quality. Presence of Herring bone cross-stratification indicates tidal influence in deposition of RRS.

 

AAPG Search and Discovery Article #90157©2012 AAPG Foundation 2012 Grants-in-Aid Projects