塔里木盆地奥陶系多个层段发育碳酸盐岩台地边缘高能沉积相带，但其台缘礁滩体储层性能差 异显著。统计表明，进积-加积型镶边台缘在薄片面孔率、岩样孔隙度及录井异常方面总体超过退积- 缓坡型台缘带。前缘斜坡角度与台缘带储地比之间存在良好的正相关性。斜坡角度大、建隆高的进积-加 积型台缘带礁滩体在准同生期遭受较强的暴露和大气淡水淋滤，且早期存在的孔隙也有利于后期叠加埋 藏溶蚀作用，因而储层厚度较大，储集条件较好；而斜坡角度小的缓坡台缘带需要裂缝、热液和白云石化
作用等额外因素才能形成有效储集体。

Multiple platform margins developed in Ordovician in TarimBasin, but their reservoirs have significant differences. Statistics data show that reservoir performance of high-angle platform margin is much better than lower-angle platform margin in the aspects of thin section, porosity and logging scales. The angle of foreslope has a positive correlation with the reservoir-layer thickness ratio in platform margin reservoir. High-angle platform margin reef-shoal suffered intense exposure and meteoric water leaching and early pores is favorable for later burial dissolution. So the reservoirs in highangle platform margin reef-shoal have the characteristics of larger thickness and good quality. Low-angle platform margin reef-shoal needs additional conditions to develop good reservoirs, such as fracture, hydrothermal fluid and dolomitization.