The Elliot Oil Field lies in the northeast corner of Vanderburgh County, Indiana. Elliot Field produces from the Cypress Formation that is a sandstone reservoir.The West Baden Group is the lowermost group of the Chesterian Series of late Mississippian age in the Indiana portion of the Illinois Basin. The West Baden Group encompasses, in descending order: Cypress Formation, Reelsville Limestone, Sample Formation, Beaver Bend Limestone, and Bethel Formation.Within the study area, the West Baden Group was mapped with emphasis on the distribution of the sandstones and clarification and correlation of intervening limestone units. The West Baden has been mapped between the overlying Beech Creek Limestone and the underlying Renault Formation. Both upper and lower contacts of the West Baden appear to be sharp. The maps for this report show: structure on top and bottom of the West Baden, isopach of the West Baden, sandstone thickness and percentage in the West Baden and sandstone thickness in the Bethel, Sample and Cypress Formations.in the study area, the West Baden Group ranges from 180 to 235 feet in thickness. The irregularities in thickness of the West Baden result predominantly from variation in the percentage of sandstone. The regional dip of the West Baden beds is to the southwest at a rate of approximately 45 feet per mile. The top of the West Baden lies 1275 feet below sea level within the northeast portion of the study area.The Reelsville Limestone is absent within the study area and the Beaver Bend Limestone is only present in the northwest portion. The deposition of the Beaver Bend is most likely controlled by development of underlying sandstone of the Bethel Formation and by the amount of compaction. The presence of Beaver Bend in the northwest portion of the study area precludes the concept that only a single clastic cycle is represented during the West Baden interval.Sedimentation of the West Baden interval is dominated by the clastic dispersal system of the ancient Michigan River with a predominantly southwesterly trend. The lateral gradation of sandstone bodies into a marine section is evidence for the deltaic origin of West Baden deposits. The intervening limestone units of the West Baden interval can best be explained by the sporadic transgression and regression of a shallow epicontinental sea.Elliot Field has produced more than 640,000 barrels of oil, mostly within the last 30 years. The trapping mechanism is related to a point-bar sand with an updip permeability barrier provided by fine-grained prechannel deposits.
| Identifer | oai:union.ndltd.org:BSU/oai:cardinalscholar.bsu.edu:handle/182365 |
| Date | 03 June 2011 |
| Creators | Behnami, Farhad |
| Contributors | Pierce, Walter H. |
| Source Sets | Ball State University |
| Detected Language | English |
| Format | iv, 50 leaves : ill. ; 28 cm. |
| Source | Virtual Press |
| Coverage | n-us-in |
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