I could smell someone's curry flavoured instant noodles.
Someone was eating a cup of curry flavoured instant noodles at work and the smell was really strong.
この場合、次のような言い方ができます。
ーI could smell someone's curry flavoured instant noodles.
「(誰かの)カレー味のインスタントラーメンの匂いがする」
ーSomeone was eating a cup of curry flavoured instant noodles at work and the smell was really strong.
「誰かが職場でカレー味のカップ麺を食べていてすごく匂いがした」
ご参考まで!