高邮凹陷阜一段油气充注对储层物性演化的影响

Influence of Hydrocarbon Charging to the Reservoir Property in 1st Member of Funning Formation in Gaoyou Depression

摘要:

通过对高邮凹陷阜一段储层各种成岩现象的镜下观测与物性统计分析发现储层物性演化受到油气充注的影响.油气充注通过影响储层演化过程中各种成岩作用的进程和强度使得含油储层和非含油储层物性特征出现明显差异，造成含油层物性条件优越而非含油层物性条件相对较差.其具体影响主要表现在促进储层演化过程中各种溶解作用的进行、抑制晚期碳酸盐胶结并弱化石英的次生加大，但在压实作用的影响上需要考虑超压、常压及石油沥青化3种条件.整体上，油气充注对于储层的物性演化起到积极作用.

Abstract:

Through the microscopic observation of reservoir diagenetic phenomenon and statistical analysis of reservoir property for1st Member of Funning Formation in Gaoyou Depression, it is found that the evolution of reservoir property is influenced by hydrocarbon charging. To have an effect on the processes and intensity of diagenesis, hydrocarbon charging made the reservoir property different between oil layer and non oil layer. Generally speaking, oil layer’s property is better than non oil layer’s. For the specific influences of hydrocarbon charging, it can promote dissolution, suppress the late carbonate cementation and weaken quartz overgrowth, while when it comes to compaction, three conditions should be taken into consideration: overpressure, normal pressure and transformation from oil to asphalt. Overall, hydrocarbon charging plays an active role in reservoir property evolution.