A geothermal well drilled in 1993, the Alpine Federal #1, encountered oil and vugular porosity in the Supai carbonates. The PetroSun NZ 15-1 has shows of oil and discovered natural gas on the Concho Dome with oolitic and oolmoldic porosity in excess of 30% in the dolomites that contain oil and gas, indicating that reefs are present in the Permian Supai series. The 1959 Pan American on either side of the Manuel Seep also encountered oolitic Supai dolomites containing shows of oil. An Amstrat log cross section from Pan Am 1-A on Concho Dome to Pan Am 1-B on the East Taylor Anticline is included as Figure 5B to show the 40 to 55 foot thickness of the Fort Apache member of the Permian Supai, ,the oolites described in the samples and the live oil shows in the dolomites.
- Based on a high precision gravity and multilevel aeromagnetic survey in the Concho area, there is an area of high density between Mesa Redonda and the Concho Anticline, which has been interpreted as carbonate sequences. That area coincides with the surface anticline across the Manuel Seep, so the structure overlies and may reflect a reef buildup in the Permian Supai. Figure 6 is a map showing the two profiles that were flown across on the Manuel Seep. Since the Manuel Seep is along the edge of the Upper Supai Salt Basin, reefs, beaches and sandbars may all contain oil, natural gas and helium. Oil was encountered in the Permian Supai dolomites in the potash wells between Concho Dome and Manuel Seep. Those mineral tests with multiple oil and gas shows have been added to the map of the Holbrook Basin (Figure 1). On the other side of the Manuel Seep, the East Taylor Anticline had oil shows in the Permian Supai. An oil and gas test south of St. Johns flowed water at the rate of 700 gallons per minute (24,000 barrels per day) from a sand in the Permian Supai. Therefore, the Permian Supai has the potential for prolific production rates from the sands, as well as the vugular dolomites.