Study on Huagang Formation provenance characteristics and effects onreservoirs in Xihu Sag

In order to find out the controlling factor of provenance on reservoir quality of Huagang Formation in Xihu Sag, the heavy mineral assemblages, rock slice observation, restoration of Paleo-flow and geostatistics technical were used to make clear the influence of material source on high quality reservoir. Results show that the T1 structure was mainly affected by the Diaoyu Islands folding zone. The H3-H4 sand of T2-T5 in the central inversion mainly came from the northwest and Haijiao Uplift. The provenances of Member H1-H2 and the members below Member H4 came from the Diaoyu Islands. The H3-H4 sand of T7-T8 in south of the central inversion belt mainly came from the Haijiao Uplift and the Yushan Uplift. The reservoirs which were sourced from the metamorphic parent in the west have better qualities than those were sourced from the eastern part of the magma parent. Comprehensive research shows that provenance analysis of multi source basin should pay attention to the heterogeneity, finding 4～5 sequence scale source distribution, in order to provide a more accurate prediction of high quality reservoir.