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Fifteen miles south of Florence, Arizona, preparations for a unique drillhole were completed in late February. The drillhole is unprecedented in its physical dimensions. It will like ly smash the Arizona depth record of 1 2, 500 feet set in 1972 by Exxon, 15 miles southeast of Tucson. The geologic reasoning behind the placement of the well is also unprecedented in its vision of a thrust fault complex of heretofore undreamed of size and displacement that hides oil-bearing rocks under a veneer of barren crystalline granite and metamorphic rocks.
Fifteen miles south of Florence, Arizona, preparations for a unique drillhole were completed in late February. The drillhole is unprecedented in its physical dimensions. It will like ly smash the Arizona depth record of 1 2, 500 feet set in 1972 by Exxon, 15 miles southeast of Tucson. The geologic reasoning behind the placement of the well is also unprecedented in its vision of a thrust fault complex of heretofore undreamed of size and displacement that hides oil-bearing rocks under a veneer of barren crystalline granite and metamorphic rocks.
In late February, 1980, Anschutz Corporation of Denver, in conjunction with its partner, Texoma Production Co., an exploration subsidiary of Peoples Gas Company of Chicago, began drilling their historic and long-awaited oil test.
After two years of exploration, Anschutz-Texoma have located their wildcat well in Section 2, T. 7 S., R. 10 E. of Pinal County, between Tucson and Florence (Figure 1). In January, over 100 truckloads of equipment were scheduled to arrive at the Anschutz-operated site from a former drilling site in Wyoming. A smaller hole has been drilled on the site to supply water for the parent rig. In order to reach the drilling depths expected to be favorable for oil and/or gas, the initial hole diameter at the surface is about three feet in diameter. The initial three foot penetration was drilled by a smaller rig. This “pilot” rig has now been replaced by a much larger rig from Wyoming owned by Parker Drilling Company and capable of a 25,000 foot test if needed. Anschutz-Texoma officials expect to reach favorable rocks in 8-10,000 feet and are prepared to drill to 20,000 feet, and spend twelve million dollars if necessary. Anschutz officials have indicated that a second hole will be started (spudded) while the first drillhole is still in progress. The first hole will take 240 to 300 days to drill. In drillers’ parlance, the drillhole is “well engineered” to handle almost any eventuality, such as blow-outs, and corrosive agents, like salt and hydrogen sulfide.
Fifteen miles south of Florence, Arizona, preparations for a unique drillhole were completed in late February. The drillhole is unprecedented in its physical dimensions. It will like ly smash the Arizona depth record of 1 2, 500 feet set in 1972 by Exxon, 15 miles southeast of Tucson. The geologic reasoning behind the placement of the well is also unprecedented in its vision of a thrust fault complex of heretofore undreamed of size and displacement that hides oil-bearing rocks under a veneer of barren crystalline granite and metamorphic rocks.
In late February, 1980, Anschutz Corporation of Denver, in conjunction with its partner, Texoma Production Co., an exploration subsidiary of Peoples Gas Company of Chicago, began drilling their historic and long-awaited oil test.
After two years of exploration, Anschutz-Texoma have located their wildcat well in Section 2, T. 7 S., R. 10 E. of Pinal County, between Tucson and Florence (Figure 1). In January, over 100 truckloads of equipment were scheduled to arrive at the Anschutz-operated site from a former drilling site in Wyoming. A smaller hole has been drilled on the site to supply water for the parent rig. In order to reach the drilling depths expected to be favorable for oil and/or gas, the initial hole diameter at the surface is about three feet in diameter. The initial three foot penetration was drilled by a smaller rig. This “pilot” rig has now been replaced by a much larger rig from Wyoming owned by Parker Drilling Company and capable of a 25,000 foot test if needed. Anschutz-Texoma officials expect to reach favorable rocks in 8-10,000 feet and are prepared to drill to 20,000 feet, and spend twelve million dollars if necessary. Anschutz officials have indicated that a second hole will be started (spudded) while the first drillhole is still in progress. The first hole will take 240 to 300 days to drill. In drillers’ parlance, the drillhole is “well engineered” to handle almost any eventuality, such as blow-outs, and corrosive agents, like salt and hydrogen sulfide.
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