CREATE TABLE table_166346_1 (region VARCHAR2, production___bbl__day_ VARCHAR2)

Which regions had a production (bbl/day) of 1,213,000 (21st)?
SELECT region FROM table_166346_1 WHERE production___bbl__day_ = "1,213,000 (21st)"
SELECT "region" FROM "table_166346_1" WHERE "1,213,000 (21st)" = "production___bbl__day_"