Rich carbazole compounds,including carbazole,alkylcarbazole and benzocarbazoles were detected by GC/MS in lacustrine oils from Huqing oilfield.

• 胡庆油田湖相原油成熟度低,多为低成熟原油,生物降解作用轻微,原油中含有丰富的咔唑类化合物。