【正文】 eeply affect accumulating oil and gas. (2)The remain uncertain migration and accumulation process of oil and gas about Formation Mechanism and Distribution of PaleogeneNeogene Stratigraphic Reservoirs in Jiyang Depression 4 stratigraphic reservoir remain uncertain . Stratigraphic reservoir lay in edge of basin . So it is difficult to exactly hold accumulation regular of oil and gas because far distance traps and hydrocarbon resources make a plicated migration process. (3)Forecasting model of stratigraphic reservoir that could be used to guide explore is lack It is necessity to finely evaluate and explore stratigraphic reservoir along with degree of exploration. Mayor controlling factors remain uncertain in construction of forecasting model of stratigraphic reservoirs. Aim, sense and application value of theme The study resolves the problem of statigraphic reservoir formation and distribution of PaleogeneNeogene in Jiyang depression. By analysis of uniformity structure, their affect on statigraphic reservoir formation will be identify。 Neogene。parallel, parallel—overlap and paralel unconformity in Jiyang truncationoverlap unconformity lies in slopes of depression, and parallel unconformity developed inside of depression,another two types lie in local areas. Unconformity can be developed vertically threelayer structure which including unconformity roof rock, weathered clay layer and semiweathered rock. It also Can be two—layer structure if without weathered clay part of semi—weather rock Can be form a hard shell accuse of its filling process during the later stage. Geological characteristic of the structure layer of unconformity is different in lithology,mineralogy, element geochemistry and weather degree index. Based on optimal partition of sequential number and principal ponent analysis, logging quantification recognition method about unconformity structure layers were established, on which effective identification of unconformitystnlcture layers can bu achieved Formation Mechanism and Distribution of PaleogeneNeogene Stratigraphic Reservoirs in Jiyang Depression 2 in the case of no rock core. The formation of various unconformity structure types is Formation Mechanism and Distribution of PaleogeneNeogene Stratigraphic Reservoirs in Jiyang Depression 1 related to many factors such as, parent rock lithology, interval of deposition hiatus, palaeotopography,and preservation conditions, which aretogether to control spatial distributions of unconformity structure types . Macro styles and its vertical structure of unconformity can be effected as a blocking, reservoir, trap or carrier affection to fluid depends on weathered clay layer,hard shell of semiweathered rock and mudstone. So petroleum migration and accumulation units is relatively independence above and belowunconformity if structure layers mentioned above existed. Reservoir affection is due to permeable rock, including roof sandstone .Semiweathered sandstone, semiweathered carbonate rock, semi—weathered igneous rock and semiweathered metamorphic. Trap—controlling affection related to macro unconformity type and its juxtapose to permeability and impermeability rock above and below unconformity. It is easy to develop stratigraphy traps where the permeability and impermeability beds juxtapose in a truncationoverlap unconformity, where up permeability and down impermeability in paralleloverlap unconformity, and down permeability and up impermeability beds juxtapose in a truncationparallel. Transporting affection is owing to lateral continuity of permeable rock of unconformity. In a terrestrial rift basin, petroleum migration in transverse or vertical short distance in local area, and is not conducive to petroleum long distance along unconformity, because interbedding pattern of mudstone and sandstone is dominated, and its physical property of mudstone improved poorly . Because of the long distance from resource to trap, migration and accumulation procese is very plicated.. Accumulation process of PaleogeneNeogene stratigraphic traps can be summarized as following： allochthonous source rock , pound transportation , later period charging, buoyancy and pressure conversion driving for accumulation, and blocking by nonpermeable layer of unconformity, Trap types and its distribution are controlled by unconformity structure styles. Petroleum distribution and its scale are controlled by generating ability of Source rock. Petroleum accumulation area is decided by positive tectonic units. If carrier system existed , oil column of stratigraphic reservoirs is effected by four main factors which including generation expulsion quantity,migrating distance, dip angle and capillary resistance of carrier layer. Based on the analysis of single factor, the prediction model of height of oil columu through multi—factor regressions was established . Based on the model , the paper defruited favorable areas, which reserves in these areas exceed x 1 08t . Formation Mechanism and Distribution of PaleogeneNeogene Stratigraphic Reservoirs in Jiyang Depression 2 Research results of the paper bined closely with exploration practice, and according to previous research results， 31 exploration wells had been drilled, which of them 17 wells were successfully from 2020 to 2020. There is accumulation proved reserves Was up to 2362x104t. and predict reserves was to 3684x104t . Keywords： Paleogene。 distribution pattern。1954. The book entirely introduced definition and significance of unconformity and the relatiooships with oil accumulation .The research and application of unconformity were promoted by stratigraohy and recent oil and gas accumulation theory,especially,the sequence stratigraohy pay a important role in predict of geological discontinuity . P