Abstract: The microlayer correlation of oil beds is presented as an important technique for the development of oil fields.The Jurassic Sanjianfang Formation in the Shanshan oil field,Xinjiang is interpreted to be assigned to the continental-dominated sedimentary strata.The sandstone beds as oil reservoirs tend to be laterally inextensive, and thus are difficult to be correlated by means of the pre-existing geological data.The author integrates in this paper the current data on the development of oil fields with the sedimentary rhythmites in the Sanjianfang Formation so as to present the reliable results of research on the microlayer continuity,sandbody boundary and distribution.