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Stratigraphy, Exploration and EOR potential of the Tensleep/Casper Formations, SE Wyoming
Project Media:
Study Year: 2016


There are two main themes of this poster. The first theme is to provide an update on the stratigraphy and sedimentology of the Tensleep/Casper Formation of Southeast Wyoming (and parts of Northern Colorado), and oil production from these rocks. We incorporate new measured sections, stratigraphic analysis and petrographic work undertaken by the authors. To this end we created a new database in ArcGis (geographic information software) of tops and other information that updates the historical well database of the Wyoming Oil and Gas Commission archived in Casper. This new database has been used to create Common Risk Segment (CRS) maps of the Upper Tensleep oil play in Southeast Wyoming. These CRS maps indicate trends in Tensleep reservoir, charge and trap that are useful in planning further exploration. It is possible that use of advanced seismic techniques applied over the complex structural terrains in the identified high potential areas of SE Wyoming will produce new leads and ultimately, new discoveries.

Field Guide to the Minnelusa Formation
Project Media:
Study Year: 2014

Purpose of Field Trip

The purpose of this field trip and the lectures is to acquaint participants with the sedimentology of the Middle and Upper Minnelusa Formation, using outcrops in the Black Hills of Wyoming and South Dakota. The trip provides a good opportunity to examine in outcrop many of the sedimentary facies that strongly control oil production in the nearby Minnelusa oil play. Along with study of the outcrops, we review important principles of oil and gas production from eolian reservoirs using modern and ancient oil field and outcrop examples. These ideas may be useful in analyzing eolian reservoirs for secondary or tertiary recovery operations, or understanding past reservoir behavior.

Core evaluation and clay analysis of the Newcastle Sandstone
Project Media:
Study Year: 2013

Executive Summary

Osage Partners, LLC. a Wyoming based operator contacted EORI and requested the institute’s assistance regarding their Muddy/Newcastle assets. The operator provided EORI with core from four wells and associated data related to the Osage field in the Powder River Basin. The operator requested that EORI characterize the clay mineralogy of the pay sands using XRD, SEM, and CEC analysis of samples from the provided core.

Acknowledgements & Credits: University of Wyoming School of Energy Resources • EORI
Ash Creek Simulations
Project Media:
Study Year: 2016

Background and objective

How do the high K strikes in core data possibly impact oil production Ash Creek field in Pilot 3?


  • Introduction & model settings
  • Comparison of the simulation results
  • Primary analysis of Ash Creek data
  • Conclusions

Acknowledgements & Credits: The software, Petrel & Eclipse used to accomplish this work are donated by Schlumberger, Inc. • Nick Jones, Enhanced Oil Recovery Institute • Jessica Barhaug, Enhanced Oil Recovery Institute • Marron Bingle-Davis, Sunshine Valley Petroleum Corporation
ROZ in the Tensleep Formation
Project Media:
Study Year: 2011-2012

EORI Tensleep ROZ Study Summary 2011‐2012

Nick Jones of EORI explores the application of Permian Basin ideas to the Bighorn Basin through the use of cores, cuttings, well logs, PI cards, and more.

Acknowledgements & Credits: • Enhanced Oil Recovery Commission • Wyoming Oil & Gas Conservation Commission • Wyoming Geological Association • Wyoming Pipeline Authority • University of Wyoming School of Energy Resources • Peigui Yin • Matt Johnson • Steve Fryberger