Based on above analysis,puts forward some effective measures,including establishing risk early-warning system on this foundation,strengthening the explore of resources at home and abroad,building the petroleum lays to separate the petroleum risk and strengthening the macro view management which works to moderate and the stanza oil to guarantee the safety of nation petroleum.

Use AHP method based on expert\'s reliability, acquired the weight distribution of oil spill risk influencing factors which based on the expert\'s reliability.

It has been proved by exploration that alluvial fan deposition tends to form effective reservoirs which have self-protection ability; an alluvial fan is likely to have fan-anticline reservoirs in its overlying formation or weathered crust reservoirs in underlying basement.