摘要
含油气系统思路为认识盆地的油气富集规律和远景目标评价提供了强有力的分析工具 ,但是研究存在尺度效应。大多数情况下 ,含油气系统研究评价成藏组合 ,油气运聚单元研究评价圈闭。运聚单元具有相对明确的边界和边界流量定义 ,是实现运聚过程动态模拟的最小成因单元。在运聚单元中进行圈闭研究时 ,边界的选择必须以目标圈闭的形成和发育期为依据。同时 ,为了体现地层和断块等多种圈闭类型的流场特征 ,运聚单元的纵向尺度要细划到层序体系域。与传统方法比较 ,基于运聚单元的圈闭分析更加强调输导网络的有效性 ,以及关键时刻的圈闭条件。只要能够建立关键时刻与圈闭尺度匹配的运聚体系框架 ,及相对确定的油气源分析 。
The petroleum system philosophy has great utility in providing an unifying concept for understanding the distribution of hydrocarbon accumulations.The concept has been used effectively to analysis and evaluate plays,but the abnormal of liquid potential energy induced by a trap was usually too weak to simulate.In present,it has been recognized that the migration accumulation units (MAU) have more powerful influence on the discovery ratio and the risk assessment in the traps than a total petroleum system.Two important steps must be paid enough attention.The first one is that the boundary of MAU must be selected according to the critical moment on the traps forming,and the other one is that the stratum unit must be classified by the tracts of a sequence stratigraphic for simulation.The revolutionary progress on trap research will be the concept changing from “reservoir” to “carrier network”.Because the migration process is hydrocarbon from source to trap,it can be simulated only in a MAU based on the carrier network.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2001年第4期18-23,共6页
Acta Petrolei Sinica
