1. East Texas Oil Field (1930) • • Largest “lower-48” field
Unconformity
Unconformity T T
rap
rap W W
est
est
East
East
Sea Level
Sea Level
Reservoir
Reservoir
1,000
1,000
2,000
2,000
Seal
Seal
3,000
unconformity
3,000
unconformity
120°F
Discovered in 1930, the East Texas oil field was located first from surface mapping.  It is a combined structural/stratigraphic trap with an erosional unconformity on one limb of folded strata.
Kitchen
Kitchen • •
Largest “lower-48” field
Largest “lower-48” field • •
More than 5 billion barrels recoverable
More than 5 billion barrels recoverable
American Association of Petroleum Geologists, 1990