Summary

Zhu I sag is a prolific sub-basin in the Pearl River Mouth basin, the enrichment of hydrocarbon in and around it is controlled by several factors: well-developed lacustrine source rock in Paleogene rifting stage, regional deltaic and littoral sandstone as reservoir and conduit for migration in early post-rifling stage (late Oligocene—early Miocene) and thick marine mudstone in middle post-rifting stage (late Early Miocene— early Middle Miocene) as a regional seal.. With high geothermal gradient, the source rock began its main generation / expulsion phase in Early—Middle Miocene, meanwhile, many preexisting and relative complete traps on high place and in the direction of migration became favorable accumulation sites for hydrocarbon.

AAPG Search and Discovery Article #90928©1999 AAPG Annual Convention, San Antonio, Texas