THE COMPARISON RESEARCH OF HYDROCARBON GEOLOGIC CONDITIONS IN THE AUSTRALIAN NORTH WEST SHELF, NIGER DELTA BASIN AND THE CAMPOS BASIN

There are not only similarities but also unique characteristics among Campos Basin,Niger Delta Basin and Australian North West Shelf(NWS).The major unique characteristics are in three areas: 1.The oil and gas of the NWS rich in the rifting sequence,but Campos Basin and Niger Delta Basin rich in the drifting sequence.Its reason is the NWS has a few periods rifting or the others have one period rifting.2.Because the characteristics of hydrocarbon source rocks are different,the distribution characteristics of oil and gas are different in different basins.The NWS is abundant in gas and less in oil,otherwise the others abundant in oil and less in gas.3.The major controlling factors for distribution of oil and gas are different in the three basins,the factors of Campos Basin are the turbidity sands and salt movements,the factor of Niger Delta Basin is contemporaneous faults,the factor of the NWS is structure.