Structure of unconformity and its control on hydrocarbon accumulation;

Method of identifying unconformity by using logging data.;

Application of logging data in identifying the depth of unconformity.;

Role of surface of unconformity in formation of oil or gas reservoirs;

The combination of fault transport system and connected sandbody, surface of unconformity transport systems form the compound transport systems of fault - connected sand body, fault -surface of unconformity and fault - connected sandb.

The Pb-Zn deposit in Northeastern Guangxi are occurred under the surface of unconformity between the Cambrican-Ordovician and the lower Devonian ,and were formed under complex conditions.

This method is well applied in plotting unconformable surface,identifying fault,analysing sedimentary microfacies and judging palaeocurrent direction.

Chengdao area is abundant in multifarious migration pathways as fault,sand body and unconformable surface, which compose a solid migration pathway.

Control factors for hydrocarbon migration along unconformity surface,faults and sandbody in Hailaer burial hill reservoirs;

The unconformity surface in the Permian of Junggar basin and the characters of oil-gas migration and accumulation;

For the different fracture systems and reservoir forming conditions between Trertiary system and pre-Tertiary system,Chezhen sag has binary geologic structure,and the hydrocarbon accumulation and reser- voir-forming were chiefly controlled by the widely dis- tributed Yanshan unconformity surface.