Author

Hartwick

Date of Award

5-2010

Degree Name

Master of Science

Department

Geological and Environmental Sciences

First Advisor

Dr. Christopher J. Schmidt

Second Advisor

Dr. David Barnes

Third Advisor

Dr. Michelle Kominz

Fourth Advisor

Dr. John Vrona

Access Setting

Masters Thesis-Campus Only

Abstract

The Lower Jurassic Navajo sandstone and the Middle Jurassic White Throne sandstone compose the primary reservoirs at Covenant Field, located in the Central Utah Thrust Belt. Analysis of the stratigraphic and structural features identified from resistivity image logs along with core and other well data permitted the definition of dune architecture in the eolian sandstone units, description of the fracture network, and estimation of the present day stress field.

The recent assignment of rocks previously known as "Upper Navajo" at Covenant Field to the White Throne sandstone is supported by stratigraphic analyses. Unique fracture populations were identified within the White Throne and Navajo sandstones, however the fractures do not appear to affect production characteristics at this time in the field's life. Based on the results of this study, effective field management practices and secondary recovery efforts should include consideration of unique permeability anisotropy directions in the White Throne and Navajo reservoirs and of the normal fault network that appears to provide inter-well and inter-reservoir communication.

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