TERTIARY SEDIMENTARY FACIES AND THEIR CONTROLS ON THE RESERVOIR QUALITY IN THE NINGMING REGION,GUANGXI

The Tertiary strata in the Ningming,Haiyuan and Shangsi Basins,Guangxi can be grouped,from base upwards,into the following four formations;Lower Dazha,Upper Dazha,Ningming and Nonghui Formations on the basis of Hthologic,palaeontological and seismic data coupled with the previous data,and further be assigned to the pluvial fan fa-cies,fluvial facies,lakeshore facies,lacustrine and swamp facies in terms of lithological, sedimentological,grain size and seismic data.The present paper has also described the dis-tribution and controls of individual sedimentary microfacies on the reservoir quality during the different stages of Tertiary time.