What is the lowest CPC Blend Kazakhstan number when Draugen North Sea is 17?
CREATE TABLE "typical_heavy_naphtha_feedstocks" (
  "crude_oil_name_rightarrow_location_rightarrow" text,
  "barrow_island_australia" real,
  "mutineer_exeter_australia" real,
  "cpc_blend_kazakhstan" real,
  "draugen_north_sea" real
);
SELECT MIN("cpc_blend_kazakhstan") FROM "typical_heavy_naphtha_feedstocks" WHERE "draugen_north_sea"=17;