The Doswell oil field lies near the geographic center of the San Juan basin, in the northern portion of Township 26 North, Range 6 West, Rio Arriba County, New Mexico, approximately 42 miles

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southeast of the town of Farmington. The field was discovered by the late Thomas W. Doswell and the late Todd M. Pettigrew and is now controlled by Lowry et al. Previous to the discovery, two non-commercial tests were drilled into the Morrison formation.

The discovery well, Doswell-Pettigrew No. 2 Scott-Federal, NW/4 SE/4 of Section 9, Township 26 North, Range 6 West, was completed in July, 1951. It was drilled to a total depth of 6,700 feet, through the Tocito, and completed for an initial production of 404 barrels of oil daily, flowing through 12/64-inch choke.

Average daily production from the No. 2 Scott-Federal to January 1, 1952, was 390 barrels of oil, and the Lowry et al. No. 4-13-132 Federal, the second producer, NE/4 NE/4 of Section 9, Township 26 North, Range 6 West, has averaged 186 barrels of oil daily since completion. Cumulative production of the field to January 1, 1952, was 64,054 barrels of oil.

The limits of the field have not been defined; however, one mile south and updip from the discovery well, the Doswell-Pettigrew No. 1 State found the Tocito sandstone to be tight and shaly.

The Doswell field probably represents a stratigraphic trap with no apparent structural uplift; however, subsequent drilling may indicate the presence of a structural trap, and sand conditions are the determining factor for oil accumulation.

The producing formation, the Tocito sandstone lentil of the Mancos formation of Upper Cretaceous age, has been correlated with the Gallup sandstone, a tongue of the lower Mesaverde formation. The Tocito sandstone of marine deposition lenticular, and cross-bedded, has good development in the upper and fair development in the lower part.

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