Reef-bank carbonate reservoirs is one of the important reservoir types in the petroliferous basins around South China Sea.Proved hydrocarbon reservoirs in A region of the Pearl River Mouth Basin are of reef-bank carbonate type.For a long time

the restriction of the low-resolution of seismic data and poor description of the effective reservoirs have seriously influenced the understanding of the distribution of the reef-bank reservoirs.The integration of various techniques such as frequency-expanding processing

sparse-spike inversion

physical property inversion and the 3D visualization made us successfully reveal the spatial distribution of the reef-bank reservoirs

delineate oil-water contact in combination with drilling data

and calculate the recoverable reserves of the reef-bank reservoirs.The appraisal wells emplaced based on the quantitative description results of the effective reservoirs flowed commercial oil and the drilling results coincide well with the reservoir description

confirming the practicability and effectiveness of the methods.Meanwhile

sedimentary faices belt and fresh water leaching dissolution caused by drops of 4

th

-order sea level are also closed related with the development of reef-bank reservoirs.In addition

the direction of wind is another major controlling factor on the heterogeneity of reef-bank reservoirs.