Abstract: Uplift is a large-scale positive structural element of sedimentary basin and has strong influences on the structural evolution,depositional system and fluid flow in the basin.Uplift has the poly-mechanism in its generation.The extension,compression and strike-slipping environments can give rise to the formation of uplift.With the transition of geodynamic settings,the varied primary-generated uplifts may show the distinct characteristic of superposition owing to the combination of the above-mentioned mechanisms and entitle a kind of much complicated structure and configuration.The evolution of uplift has undergone a process from the formation-period (or embryo-period),growing-period to mature-period and then succeeding,decreasing gradually or disappearing in the end.This process can be called as uplift cycle.Uplift can thus show a shape of any accordingly period of such a developing process.The existing uplift today is in some periods of growing.Uplift is an important area for oil and gas accumulated in petroliferous basin and has great influences upon pool-formation.The uplift during deposition period has restricted the development of the source rock-reservoir rock-cap rock assemblages.The uplift during reservoir-forming period controlled oil-gas accumulation.The uplift during adjusting period or modifying period governed the re-distribution of oil and gas,and the uplift during perching period or burying period controlled the position of oil-gas occurrence.The sedimentary basins are largely the superimposition of proto-type basins in different periods.The poly-history superposition has resulted in the favorable functions on uplift,such as intervals of the multiple oil and gas-bearing in paleo-highs,additional hydrocarbon plays exactly above or below superimposition contacts,large-scale oil-gas accumulation zones resulted from the multi-period charging and accumulation of hydrocarbon and increase of pool-forming probabilities in the uplift,or the generation of the fault-dominated oil-gas accumulation zones owing to the linkage among faults of different periods and the multiple independent petroliferous zones separated by the sealing beds of a later petrogenic origin.The axial and slope zones of the uplifts are favorable for generating a large-scale oil-gas accumulation dominated by the anticline and the lithologic-stratigraphic reservoirs respectively.

Key words: superimposed basin, paleo-uplift, uplift cycle, genetic mechanism, pool-formation conditions, oil-gas occurrence

摘要： 隆起是沉积盆地中的大型正向构造单元,对于沉积盆地的构造演化、沉积体系及流体活动都有较大的制约作用.隆起具有多种成因机制,伸展、聚敛与走滑环境都可以形成隆起.随着地球动力学环境的变化,各种动力机制的复合可以使不同初始成因的隆起发生叠加,从而形成结构形态更加复杂的隆起.隆起的演化可以划分为形成期(或雏形期)、发展期、高峰期、继承期、改造期和消亡期6个基本阶段,而现今所见的隆起可能仅停留在某些阶段上.在含油气盆地中,隆起往往是重要的油气聚集场所.沉积期的隆起影响着生储盖组合的发育;成藏期的隆起制约着油气运聚;调整期的隆起影响着油气再分配;定位期的隆起决定着油气最终富集部位.沉积盆地大多为多期原型盆地叠加发育而成,多期叠合作用导致:古隆起多层系油气聚集;在叠加界面上形成了一套油气成藏组合;多期生、运、聚使古隆起油气聚集几率增大,易形成大型油气聚集带;多期次断裂复合可形成以断裂为主导的油气聚集带;后期成岩改造形成的"封闭层"将古隆起分割为多个含油气区间.古隆起轴部及其斜坡带分别形成了以背斜型和岩性-地层型为基础的大型油气聚集(区)带,油气藏具有纵向叠置、横向连片的复式含油气结构.

关键词: 叠加盆地, 古隆起, 隆起旋回, 成因机制, 成藏条件, 油气分布规律