Abstract:

A correlative study was carried out on the crude,oil sands,and source rocks in Huqing oilfield by adopting the 3D fluorescence analysis method and integrating the analysis result of aromatic fractions of crude oil.The result shows that crudes in Huqing oilfield can be divided into 5 types and the source rocks can be classified into 3 types according to their spectrum characteristics.The dominant fluorescence wavelengths of the crude oil samples from all the reservoirs are lower than that of the type C source rocks,but higher than that of the type A and type B source rocks.It is therefore suggested that crudes widely distributed in various fault blocks of Huqing oilfield are the mixture of low-mature and mature oil generated during the early hydrocarbon generating cycle.

Key words: 3-D fluorescene spectrum, fingerprint technology, oil source, Huqing area, Dongp Depression