新疆红连地区七克台组储层成岩作用与成岩相

吐哈盆地红连地区中侏罗统七克台组油气勘探潜力巨大。在综合运用普通薄片、铸体薄片和扫描电镜等资料的基础上，系统分析七克台组储集砂岩成岩作用特征，建立成岩演化序列，进而分析成岩相特征及有利成岩相的分布。结果表明：七克台组储集砂岩成岩阶段总体处于中成岩阶段 A－B 期，主要经历了压实作用、胶结作用、溶蚀作用和破裂作用。压实作用、硅质胶结作用、碳酸盐胶结作用对储层起破坏性作用；建设性的成岩作用主要为早期绿泥石环边胶结作用、溶蚀作用和破裂作用。初步进行了成岩相特征的研究，划分出5种成岩相类型，其中环边绿泥石胶结-硅质、高岭石充填-剩余原生粒间孔成岩相和伊利石、方解石充填-剩余原生粒间孔-溶蚀孔成岩相为较有利的成岩相类型。

Diagenesis and diagenetic facies of the Qiketai Formation in Honglian area,Xinjiang,China

Data of thin sections,cast slice,SEM and other analyses are used to study the diagenesis of Middle Jurassic Qiketai Formation in the Honglian area so as to establish the diagenetic evolution sequence and analyze the characteristics of diagenetic facies and distribution of favorable facies for accumulation of oil and gas.It shows that the sandstones of Qiketai Formation are in the mid-diagenetic A-B stage and experience destructive diageneses of compaction,siliceous cementation, carbonate cementation,and constructive diageneses of rim agglutination of chlorite at the early stage, solution and cataclasis.Five types of diagenetic facies are divided according to association types and evolutionary sequences of the diagenesis. Rim agglutination of chlorite-siliceous cementation, kaolinite-residual primary intergranular pore diagenetic facies and carbonate cementation-residual primary intergranular pore-dissolved pore diagenetic facies are favorable diagenetic facies in the study area.