Geological data and various logging data were integrated to perform geologic interpretation of 3D seismic data of 4 sags in Beibuwan Basin.Characteristics of tectonic transport in this basin were discussed based on analyses of spatial distribution of the major boundary faults of each sag

fault throw at different stages and the transport of depocenter and subsidence center in the basin at different stages.The influences of tectonic transport on hydrocarbon accumulation was also discussed.The tectonic transport of Beibuwan Basin is characterized by wave-like directivity and convergent bias-symmetry.Tectonic transport resulted in present tectonic framework of the basin

controled the source-reservoir-caprock assemblages within the basin

changed temperature and pressure fields

accelerated source rock maturation and evolution

and hydrocarbon migration and accumulation.Because of the influence of tectonic transport

the source rock richness are different from sag to sag in the basin

the Weixinan sag has the richest source rock followed by the Wushi sag

Haizhong sag and Maichen sag.