【摘要】 中国陆相致密油总体上运移距离相对较短,其形成和分布主要受构造背景、烃源岩、储层及源储配置控制,呈现出在优质烃源岩发育区内连续或准连续分布、局部富集的特点。烃源岩和储层在纵向和平面上的匹配关系,控制了致密油藏的形成、分布与规模,以源储配置关系为依据,将致密油资源划分为源内型和源外型,这2类致密油在中国各大含油气盆地均广泛分布。源内型致密油资源的分布和富集受烃源岩和有利储层分布控制;源外型致密油资源受输导体系和有利储层分布控制,但输导体系的有效性也受到烃源岩分布的控制,致密油资源的分级评价应考虑烃源岩和储层这2个核心参数。烃源岩和储层条件分类评价是致密油勘探潜力评价的基础,松辽、鄂尔多斯、四川、三塘湖、柴达木、准噶尔等六大重点盆地致密油资源总量为90.51×10~8t,是致密油勘探的主要地区。更多还原

【Abstract】 The formation and distribution of continental tight oil in China are mainly controlled by tectonic background,source rocks,reservoirs and source-reservoir configuration,showing the characteristics of continuous or quasi-continuous distribution and local enrichment in high-quality source rocks.The matching relationship between source rocks and reservoirs in both vertical and horizontal directions controls the formation,distribution and scale of tight reservoirs.Based on the allocation relationship between source and reservoir,the tight oil resources are divided into two types,i.ei.nside-sourcetight oil and outside--source tight oil.These two types of tight oil are widely distributed in China’s major oil--bearing basins.The distribution and enrichment of inside--s ource tight oil resources are controlled by the distribution of source rocks and favora--ble reservoirs ;the outside-source tight oil resources are controlled by the distribution of transport system and favorable reservoirs,but the validity of transport system is also controlled by the distribution of source rocks.The classification and evaluation of tight oil resources should consider the two core parameters of source rocks and reservoirs.Source rocks and reservoir conditions classification and evaluation are the basis of evaluation of tight oil exploration potential.The total amount of tight oil resources in Songliao,Ordos,Sichuan,Santanghu,Qaidam,and Junggar Basins,estimated about 9.051 billion tons,is the major exploration target for tight oil.更多还原