PRELIMINARY APPROACH TO THE DEFINITION AND CONFIRMATION OF EFFECTIVE PATHWAYS FOR MIGRATION AND ACCUMULATION
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摘要: 油气成藏系统与运移通道的分布决定了油气运移的方向和数量.本文从砂岩孔隙型通道入手,着眼于资源评价目的,提出应用同类地区工业性油气田(藏)下限标准与不同时期油气汇聚区的水流量来定义临界饱和度.该饱和度值所圈闭的范围,即为有效运聚通道.利用盆地模拟结果参数可分别计算平面和剖面上的水流量,从而得到不同地质历史时期有效运聚通道的分布范围,这将有利于运聚史和运聚量的研究.Abstract: The distribution of pool forming systems and migration pathways for hydrocarbon decides the migration direction and amount of hydrocarbon.Starting with pore typed pathways in sandstone and aimed at resource evaluation,it is suggested in this paper that critical saturability should be defined by lower limit standards for industrial hydrocarbon fields(pools) in the areas of the same kind and the water flux of hydrocarbon accumulation areas in different periods.The trapped limits by this saturability value are effective pathways for migration and accumulation.The water flux on planes and profiles can be calculated separately using basin modeling result parameters,and so the distributive limits of effective pathways for migration and accumulation in the different periods of geological history be obtained.This will be advantageous to studying on the history and amount of migration and accumulation.
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