STUDY OF PETROLEUM RESOURCE POTENTIAL APPLING OIL-ACCUMULATING UNITS IN THE JIYANG DEPRESSION

The petroleum system philosophy has great utility for evaluating oil-gas resource potential,understanding the distribution law of hydrocarbon and guiding oil-gas exploration in basins.The petroleum system subdivision is based on the critical process analysis of hydrocarbon from source rocks to traps.In this process,the largest outside boundary of oil-gas migration in a 3-D geological unit can be traced.The research on oil-gas secondary migration plays the leading role in the subdivision.The Jiyang Depression was divided into 28 oil-accumulating units on the basis of the petroleum system philosophy from source rocks to traps in the Eogene petroleum resource evaluation of the Jiyang Depression.Petroleum resources of every oil-accumulating unit were calculated on the bases of basin simulation and the study of hydrocarbon expulsion coefficient and accumulation coefficient.The resource potential was analyzed in the light of the petroleum resource volume and the prospect petroleum resource volume.The abundant degree of prospect petroleum resources and the future petroleum explorative potential in the Jiyang Depression is still great.