According to the distribution of stratigraphic sequences and structure unlts Interpret—ed using seismic data and distribution pattern of small beds constructde by multi-well cot-relation，a quantitative geological model describing t．he spatial distribution of any Partlcuiar point in a thtee--dimensional space of a reser voir has been constructed? In the model the seq uence is divided in detail and as parallelly as possible to the primary sedlmentary sur_ face．With this model as a framework combined with the reservoir parameters obtained bymeans of well logging interpretation and core aD．alysis or seismic interpretatlon,the authors construct a three—dimensional geological model of Leng一4 3 block i．n a three-dimenslonal space． The model is displayed in the mips workstation as verious kinds o±s11ce maps，sections and perspective maps．