Table schema:
CREATE TABLE table_166346_1 (area__km²_ INTEGER, production___bbl__day_ VARCHAR)

Question: What was the minimum area in square kilometers that produced 3,200,000 (12th) bbl/day?
SQL: SELECT MIN(area__km²_) FROM table_166346_1 WHERE production___bbl__day_ = "3,200,000 (12th)"