流体包裹体常规特征在油气成藏研究中的应用

Applications of general characteristics of fluid inclusions to the study of oil and gas pool formation.

在储集层成岩过程中 ,胶结物和次生矿物形成时常常会有流体被包裹在其内 ,形成储集层中的流体包裹体。流体包裹体在储集层中的种类、含量、分布等常规特征以及它们与成岩矿物的结构关系可以用来分析油气运移及圈闭充注模式。根据包裹体的均一温度 ,结合盆地的古地温模式和储集层埋藏历史 ,可以确定包裹体形成时的地层埋深及对应的地质时代 ,依此可以确定油气藏形成时间。通过某油气藏中储集层流体包裹体特征的研究 ,从油气运移及充注圈闭的角度 ,对该油气藏的形成机制作出了合理的阐述。认为该油气藏的成藏期为早第三纪末 ;油、气、水 (主要是油与水的混相液体 )同期运移至储集层 ;油气经过长距离运移聚集成藏 ,成藏后几乎没有再经历调整 。

Fluid inclusions in rese rvoir are formed during the growth of cements and secondary mineral in which flu ids are included. The general character of fluid inclusions and their type, cont ent, distribution and structure relationship with diagenetic minerals can be use d to study the oil and gas migration and trap charging mode. According to the h omogenization temperature of fluid inclusions, the paleo geotemperature mode of basin and the reservoir subsidence history, the time and depth of fluid inclusi ons formation can be confirmed, which shows the time of hydrocarbon pool formati on. This article discusses an oil pool formation mechanism by the analysis to th e general characteristic of fluid inclusio ns in the reservoir.