Mid-Continent Section

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Short Junction Field core description and petrophysical analysis of the Hunton Group, Cleveland County, Oklahoma


The Short Junction field in northeast Cleveland County, Oklahoma, has produced approx.22 million barrels of oil since 1948 from two units in the Hunton Fm. of an estimated 250 million OOIP. The less than 9% recovery even after a secondary water flood leaves a sizable target for a revitalized field. Trey Resources, Inc. cored the Hunton in the WSJU 109H and acquired a full petorphysical suite including image logs. In 2008, the WSJU 109H, was recompleted as a horizontal lateral and included borehole imaging logs. These data were used to model the Bois d'Arc. The core was oriented to determine principle stress direction and structural position. Additional whole core samples were analyzed for directional permeability and plugs samples were measured permeability in the east west direction. Three plugs were selected for conventional CT scan analysis to help determine electrical properties. Advanced interpretation techniques were applied on the acquired borehole images and correlated with the core results. The objective was to characterize the heterogeneities present in the formation. With the creation of full borehole images it was possible to better identify various heterogeneities and classify them as connected or isolated vugs, fractures connecting vugs or heterogeneity developed along bed boundaries. Matrix versus vuggy porosity type was compared across these intervals.