The South-Central Tejon oil field is at the southern edge of the San Joaquin Valley, approximately 1 mi. southeast of the Central Tejon oil field. It was discovered by the Drilling and Production Company in June, 1963. The oil-bearing section is the upper Miocene Reserve zone, which is 90 to 170 feet thick in the field and is composed of several sandstones separated by shale layers. Currently, 5 wells produce from depths of 2,200 feet or less. Initial production of these wells ranged from 25 to 135 BOPD; at present they average 30 BOPD.

The field lies within the Tejon embayment, an ill-defined trough of Tertiary and Quaternary sediments. Trapping results from stratigraphic pinchout across a gentle arch within an essentially homoclinal structure. Minor faults are suspected to be present and may contribute to structural closure.

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Several of the more than 35 exploratory wells and core holes previously drilled in the area encountered substantial oil and gas shows in the upper Miocene Fruitvale and Reserve zones. Several were cased and tested but commercial production could not be sustained. Geological review and modern well completion techniques were mutually beneficial in achieving production.

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