Abstract:

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.

Key words: hydrocarbon pool, Characteristics, controlling factor, Nanpu Sag