关键词: 凤河营潜山, 成藏条件, 成藏模式, 勘探潜力

Abstract: Fengheying buried hill of Langgu Depression has an exploration history of more than four decades. It saw development of two types of hydrocarbon reservoirs - buried hill top and buried hill inner curtain. Exploration degree is high for buried hill top but low for buried hill inner curtain. Based on the study of buried hill?s development characteristics, oil source conditions, reservoir-cap assemblage, oil and gas transportation systems and types of trap, the results indicate that Fengheying buried hill is characterized in early development and shaped in a late period at the peak of hydrocarbon sourcing and expulsion. However, the trap of buried hill inner curtain has the characteristic that it was developed and shaped earlier than the peak of hydrocarbon sourcing and expulsion. A number of sets of oil formation series developed in the buried hill inner curtain that is filled and injected many times and migrated continually. Based on the analysis, Fengheying buried hill has a better potential for exploration. Of that, Jing-101 buried hill has three sets of oil formation series which belong to the two types of buried hill top and inner curtain (Fujunshan Formation and Wumishan Formation). They are the top targets for making breakthrough in exploration of Fengheying buried hill and its inner curtain