中扬子西部上震旦统灯影组具有较好的勘探前景，但勘探程度极低。以地表露头资料为基础，通过储层特征综合研究．认为白云岩为区内的主要储集岩，白云岩储层孔隙类型主要有晶间孔、溶孔、砾间孔洞；空隙结构分为粗孔中喉型、粗孔小喉型和微隙微喉型3类，其中以粗孔小喉型为主。对储层进行分区评价， 结果表明张家界三岔地区储集条件最好，其次为宜昌莲沱一重庆彭水地区，永顺王村一石门杨家坪地区储集条件最差。

The Dengying Formation of Upper Sinian in western middle Yangtze is characterized by preferable exploration prospect and low degree of prospecting．Based on the SUl~aae outcrop，the reservoir characteristics are studied．The result shows that dolomite is the main reservoir rock in the study area．The pore types of dolomite reservoir are mainly intercrystal pore，dissolved pore and intra-gravel pore．The pore structure can be divided into three categories：large pore and medium throat，large pore and small throat，microcrack and microthroat，an d among them the large pore and small throat is the main type．The reservoir zoning evaluation result indicates that the reservoir condition in Zhangjiajie— Sancha area are the best，followed by Liantuo inYichang-Pengshui in Chongqing areas，and it is the worst in Wangcun of Yongshun—Yangjiaping in Shimen areas．