Early exploration in Lunpola Basin shows a good exploration potential within the Paleogene Eocene Niubao and Dingqinghu Formations.However

most of the single well test results are low.The poor understanding of hydrocarbon accumulation mechanisms and their main controlling factors affects the early exploration.In order to clarify the accumulation mechanisms and predict play fairways

a comprehensive study was performed by integrating the geological and geophysical data.It is believed that Lunpola Basin has many good reservoir forming conditions such as multiple sets of fan delta front sandstone systems

favorable source-reservoir-cap rock assemblage

inherited palaeohigh(ancient slope)

ste-reoscopic carrier systems and good timing of structure and hydrocarbon accumulation.Hydrocarbon accumulation in Lunpola Basin features in close proximity to the source rocks

multi periods of charging

damage of reservoirs with mid-shallow depth in late stage

in-situ enrichment of hydrocarbons in middle-deep layers.Six play fairways are identified in Lunpola Basin

their resource potential is estimated to be up to several hundred million tons based on calculation with the organic carbon method

and the resource abundance is relatively high

thus it has the potential to form mid-sized oil field.Especially

the Changshan litho-logic play has very favorable reservoir forming conditions and its resource potential is estimated to be up to 100 million tons.In addition

the oil shale is developed in the middle and lower Dingqinghu Formation within the play and its resource volume is three times as large as that of the conventional resources based on calculation with volume abundance method.As a whole

conventional and unconventional plays overlap in the Changshan lithologic zone

thus its exploration potential is huge.