It was showed that understanding of the diage-netic modifications and its associated products in the dee-ply to ultra-deeply buried tight sandstone reservoirs(DUDTSR)is great important for reservoir characterization and hydrocarbon prediction.However,the fine characteri-zation of diagenetic evolution via geologic modelling in tight sandstones remains a great challenge as for com-plexity of lithology,temperature,pressure and formation fluid throughout the entire life cycle of tight sandstone reservoirs.To help get a comprehensive idea of the dis-tribution of diagenetic processes on the formation of DUDTSR in the long geological period,type-Ⅰ and type-Ⅱfine sections of diagenetic stage for clastic reservoirs were creatively proposed and its essence was illustrated using the Paleogene Huagang(E3H)Formation in the southern Xihu Sag.Through combination of both quantitative and qualitative methods which began with current formation temperature,vitrinite analysis,illite and I/S mixed layers based on analytical testing of the E3H Formation,(1)Paleotemperature(T),vitrinite reflectivity and smectite in mixed layer during burial processes were restored based on numerical analysis,(2)The accurate division of diagenetic evolution was identified from coarse to fine process using new model,(3)And finally the geological significance of fine division of the conventional diagenetic stage was illustrated for low-porosity and tight sandstone reservoirs.

Manwei Zhang;Hongjing Zhao;Taiju Yin;Wendao Qian;Anxin Mei;Fan Liu

Hubei Key Laboratory of Petroleum Geochemistry and Environment,Yangtze University,Wuhan,Hubei,China;School of Geosciences,Yangtze University,Wuhan,Hubei,China;College of Marine Science and Technology,China University of Geosciences,Wuhan,Hubei,China;School of Environment and Resource,Xichang University,Xichang,Sichuan,China;Chuanqing Drilling Engineering Company Limited Sulige Project Management Department Sichuan Chengdu,Chengdu,China

地球化学学报（英文版）

[1]Manwei Zhang;Hongjing Zhao;Taiju Yin;Wendao Qian;Anxin Mei;Fan Liu-.Diagenetic evolution of clastic reservoirs and its records in fine subsection:significance and application)[J].地球化学学报（英文版）,2022(05):887-892

subsection,diage,dee,DUDTSR,Huagang,E3H,Xihu,Paleotemperature

Diagenetic,evolution,clastic,reservoirs,its,records,fine,significance,application,It,was,showed,that,understanding,modifications,associated,products,ultra,deeply,buried,tight,great,important,characterization,hydrocarbon,prediction,However,diagenetic,via,modelling,sandstones,remains,challenge,plexity,lithology,pressure,formation,fluid,throughout,entire,life,cycle,To,help,get,comprehensive,idea,dis,tribution,processes,long,geological,period,type,sections,stage,were,creatively,proposed,essence,illustrated,using,Paleogene,Formation,southern,Sag,Through,combination,both,quantitative,qualitative,methods,which,began,current,vitrinite,analysis,illite,mixed,layers,analytical,testing,reflectivity,smectite,during,burial,restored,numerical,accurate,division,identified,from,coarse,new,And,finally,conventional,low,porosity

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