Hydrocarbon transporting system and migration pattern in the buried hill reservoir of Jizhong Depression

Hydrocarbon transporting system in the buried hill reservoir of Jizhong Depression mainly involves faults,unconformity and carbonate rock.Based on the source of oil and gas,the direction of oil drainage as well as transporting type,the patterns of hydrocarbon supply in the buried hill of Jizhong Depression have been classified into two categories of inner-and outer-source supply which are subdivided into 10 types.The study shows that fault and unconformity had served as the main migration pathway in the buried hill reservoir.Most of the buried hill reservoirs had captured oil and gas through unconformity and fault by differential compaction.