Application of source to sink system analysis in large reservoir research: a case study of Huagang Formation, Central Inversion Belt, Xihu Depression

Detrital zircon U-Pb dating, heavy mineral assemblage, imaging logging and seismic interpretation were applied to analyze the source to sink system in the Central Inversion Belt of the Xihu Sag. The formation process of large reservoirs in the Central Inversion Belt was studied. During the depositional period of the Huagang Formation, there were three provenance areas in the Central Inversion Belt, including the Hupijiao Uplift in the north, the Haijiao Uplift in the west and the Diaoyu Island Transitional Belt in the east. Three source channels for sand import developed in the Central Inversion Belt, including the large axially channels, the incised valley channels in the west and the channels in the Diaoyu Island Transitional Belt in the east. The Central Inversion Belt has three different large sand body convergence areas in the north, center and south. On this basis, the long-distance transportation of source sand in the Hupijiao Uplift in the north and the point source input in the Haijiao Uplift in the west and the Diaoyu Island Transitional Belt were comprehensively determined.