Typical turbidite sandstones developed in the upper part of the third member of Shahejie Formation in the Shang847 block，Huimin sag. The reservoir evolution is not clear because of its complex vertical change and high heterogeneity. Based on data of core，thin section observation and laboratory analysis，the characteristics and main controlling factors of reservoir heterogeneity of the lacustrine deep-water turbidites were studied. The results show that the deep-water turbidity deposition rock in Shang847 block is mostly fine-grained lithic arkose sandstones，moderate sorted，and the grains are mainly sub-angular. The reservoir is characterized by low compositional maturity and textural maturity，poor physical property，and the reservoir space is dominated by secondary pores. The sandstone is in middle diagenetic stage A.Based on the differences of compaction，cementation and dissolution，three diagenetic facies were divided. Sand group2，which has poor physical property，high cement content and weak dissolution，is medium-compaction medium-cementation weak-dissolution facies. Sand group3，which has good physical property，low cement content and strong dissolution，is medium-compaction low-cementation strong-dissolution facies. Sand group4，which has characteristics intermediated between group2 and group3，is medium-compaction medium-cementation medium-dissolution facies.