Q型聚类分析在四川盆地南部上三叠统须二段成岩相研究中的应用

发布时间：2018-05-13 10:21

本文选题：四川盆地南部 + 须家河组　；参考：《地质科技情报》2017年02期

【摘要】：上三叠统须家河组二段是四川盆地南部主要的勘探层位之一。对川南须二段储集砂岩进行的铸体薄片观察、物性资料研究表明,须二段储集岩石类型主要为长石岩屑砂岩、岩屑长石砂岩和岩屑砂岩,先后经历了压实作用、胶结作用、溶蚀作用、破裂作用和交代作用等成岩作用。在计算区内须二段储集岩石压实系数、胶结系数和溶蚀系数等成岩系数的基础上,结合Q型聚类分析方法对储集岩石的各成岩系数进行了变量因子的归类,划分出强压实强胶结相、强压实中胶结相、强压实弱胶结相、中压实弱胶结相及弱压实弱胶结相。成岩相的分布明显受到沉积相展布的影响,储层质量较好的成岩相主要发育于三角洲前缘亚相的水下分流河道等高能环境中,同时成岩相的分布还受到填隙物、塑性岩屑的控制。
[Abstract]:The member of Xujiahe formation of Upper Triassic is one of the main exploration strata in the south of Sichuan Basin. The thin section observation of the reservoir sandstone of Xuer member in south Sichuan shows that the reservoir rock types of the reservoir are mainly feldspathic sandstone, lithic feldspathic sandstone and lithic sandstone, which have experienced compaction and cementation successively, and the results show that the reservoir rock types of the reservoir are feldspathic sandstone, lithic feldspathic sandstone and lithic sandstone. Diagenesis, such as dissolution, rupture and metasomatism. On the basis of the diagenesis coefficients such as compaction coefficient, cementation coefficient and dissolution coefficient of reservoir rock in the second member reservoir in the calculated area, the variable factors of diagenesis coefficient of reservoir rock are classified with the method of Q-type cluster analysis. The strong cemented phase, the cemented phase in the strong compaction, the weak cementation phase in the middle compaction and the weak cementation phase in the weak compaction are divided. The distribution of diagenetic facies is obviously affected by the distribution of sedimentary facies. The diagenetic facies with good reservoir quality are mainly developed in high-energy environments such as underwater distributary channel of delta front facies, and the distribution of diagenetic facies is also affected by interstitial material. Control of plastic cuttings.
【作者单位】：成都理工大学油气藏地质及开发工程国家重点实验室;成都理工大学沉积地质研究院;
【基金】：国家科技重大专项(2011ZX05002-004-006HZ;2016ZX05002-004-010)
【分类号】：P618.13

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