Hydrocarbon pool of Gao-5 Block is situated at the central part of fault noze structure of the upthrow of Gaobei Fault- in Nanpu Sag

Gaoshangpu area.It was considered to be structural pool controlled by fault block in the past

but it has been proved by drilling and exploration practices that the structure is a complete fault noze structure

the provenance is in the northeast

the thickest oil layer is at the waist of the noze

the curve of oil cumulative production coinsides with the isopachous figure of the oil layer. So it is considered that the pool should be a typical lithologic one controlled by sedimentation

tectonic movement

diagenesis and epigenesis.The most favourable reservoiring zone of the study area is the subfacies zone of fan-deltaic front.