Natural Gas Migration Pathways and Their Influence on Gas Hydrate Enrichment in the Qiongdongnan Basin, South China Sea

2D and 3D seismic data basin simulation were used to investigate the gas hydrate distribution natural migration pathways in Qiongdongnan Basin (QDNB). Hydrate-related amplitude anomalies extensive bottom simulating reflectors (BSRs) mapped within uppermost part. Based on their reflection characteristics, three main types of distributions QDNB identified through high-resolution data. modeling was carried out document efficiency different effects enrichment. The results show following: (1) Diapirs, fault structures, fractures constitute that transport thermogenic from deep shallow layers QDNB. (2) impact enrichment ways. Diapirs faults contribute significantly due higher efficiency. In comparison, fracture systems is lower, with minimal benefit (3) mainly distributed along diapirs generally scattered around system. These conclusions indicate are regionally closely related accumulation.