高邮凹陷阜一段差异成岩作用及成因

Differential Diagenesis and Its Genetic Analysis of 1st Member of Funning Formation in Gaoyou Depression

摘要:

高邮凹陷阜一段处于不同成岩阶段的储层出现了大致相同的成岩矿物的成岩现象,通过对目的层成岩阶段、成岩现象分析，结合构造、盆地流体等因素, 提出差异成岩原理，认为当地层倾斜角度不大时，同一时代的地层往往处于相同的成岩阶段；早期成岩阶段的产物可能会在晚期成岩阶段中残留；当地层倾角较大时，同一时代的地层可能处于不同的成岩阶段，深部成岩流体的向上流动使浅部处于早期成岩阶段的储层具有晚期成岩现象.

Abstract:

It is found that the diagenetic minerals are quite similar in reservoirs that are undergoing different stages of diagenesis for 1st member of Funning Formation in Gaoyou Depression. The principle of differential diagenesis was summarized up through the research of diagenetic stage and minerals considering the tectonic structures and fluid in the depression. When the formation dip angle is small, formations of the same age will be at the same stage of diagenesis, early diagenetic minerals will be preserved in late diagenetic stage; when the formation dip angle is large, different diagenetic stages will be conducted in formations of the same age, deep seated diagenetic fluid may upwell, leading to late diagenetic minerals precipitate in shallow buried reservoir that early diagenetic stage dominates.