An extensive research has been performed on the lithofacies and carbonate platform types of the Cambrian in the Tarim Basin during the past decades.However

studies on the development characteristics

distribution patterns and high-quality reservoirs of the reef-flat facies are rarely documented because of the deep burial of the Cambrian

the sparse and limited exploratory wells that penetrate and reveal a relatively whole Cambrian as well as the limited quantity

cove-rage and quality of seismic data.Lunshen area located in the center of Lun Nan low salient ais taken as an example to analyze the drilling data and regional stratigraphy based on the previous study.It reveals that the Cambrian carbonate reservoirs have close relationship with sequence stratigraphy which has typical progradation characteristics of platform margin.Under the constraint of sequence stratigraphic framework and in combination with the analysis on seismic facies

a detailed description is performed on the characteristics of the Cambrian sedimentary strata in platform area

platform margin and basin area in different periods.Development characteristics

distribution and location of high-quality reservoirs of reef flat facies on platform margin are confirmed.It is of great significance for understanding the characteristics of deep reef flat facies on platform margin and selecting deep targets in Lunshen area.