The Breedlove field is in northwest Martin County, Texas, approximately 30 mi north of Midland. The field is only a few miles east of the axis of the Midland basin and on the east flank of the ancient Tobosa basin. Stratigraphically, the field is northeast of the limit of Devonian carbonate deposition and the Silurian carbonate section (major producing zone in the field) has a maximum thickness of 550 ft near the field and thins north and east toward the margin of Tobosa basin--a result of pre-Woodford erosion and nondeposition. The Silurian section is overlain by the Woodford Shale of Devonian and Early Mississippian ages, has an average thickness of 100-120 ft, and is separated from the underlying Ordovician Montoya Formation by the Sylvan Shale that ranges in thickness from 0 to 10 ft.

The field was discovered in July 1951 with the completion of the Pan American Production Company No. 1 Breedlove. This well, 660 ft from the south and 4,620 ft from the east lines of League 258, Briscoe County School Land Survey, tested (flowing) 2,341 b/d of 40° oil at 60°F through a 3/4-in. choke from perforations between 12,078 and 12,118 ft after washing with 600 gal of mud acid. The productive zone is in the upper part of the Silurian.

The Silurian reservoir consists predominantly of white to light-gray, finely to coarsely crystalline dolomite. Production is on an asymmetric anticline which plunges southwest. The accumulation is controlled on the north by a porosity barrier and on the south by the closure of the fold. A stratigraphically controlled, tilted water table is in the field.

Currently, there are 42 wells producing from the Silurian. Through January 1, 1968, these had produced 14,883,391 bbl. Other production in the field includes: (1) Spraberry (6 wells), cumulative production to January 1, 1968, 502,702 bbl; (2) Wolfcamp (2 wells), cumulative production, 41,528 bbl (abd.); and (3) Strawn (1 well), cumulative production, 94,370 bbl (abd.).

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