斋桑盆地与准噶尔盆地西北缘二叠系成藏条件对比

斋桑盆地位于“一带一路”重要的沿线国—哈萨克斯坦国东北部，二叠系成藏研究相对较少.基于斋桑盆地构造演化背景，通过与邻区准噶尔盆地西北缘在构造沉积演化、烃源岩、储盖组合以及运聚模式的对比，揭示其二叠系勘探潜力.结果表明:斋桑盆地和准噶尔盆地均为板块碰撞的产物，沉积体系受断裂控制；与风城组烃源岩类型相似，麦恰特组烃源岩有机质类型以Ⅰ和Ⅱ型为主，源岩发育于高盐度、强还原性水体环境，为一套好-很好的烃源岩；但斋桑盆地二叠系储层中孔低渗，物性相对较好，且二叠系内部发育大套地层圈闭，可形成规模地层油气藏.综合对比分析表明斋桑盆地二叠系具有良好的勘探潜力. 

Comparison of Permian Petroleum Accumulation Conditions between the Zaysan Basin and the Northwestern Margin of Junggar Basin

The Zaysan basin is located in northeastern Kazakhstan, one important country along "the Belt and Road". However, Permian petroleum accumulation research in Zaysan basin is relatively few. In this paper, Permian exploration potentials of the Zaysan basin are explored by a comparative study with adjacent northwestern margin of Junggar basin in tectonic and sedimentary evolution, hydrocarbon source rocks, reservoir cap assemblages, migration and accumulation patterns on the basis of background of tectonic evolution of the Zaysan basin. The results show both of them are the products of plate collisions and the sedimentary systems are all controlled by faults; similar to the Fengcheng Formation, the types of Maichat Formation source rocks are type Ⅰ and type Ⅱ; sources rocks deposited in high salinity, reducing environment and they are good source rocks; the reservoirs in the Zaysan basin are of medium porosity and low permeability reservoirs which indicates that the reservoir quality is relatively better. In Permian strata of the Zaysan basin there exists a large set of stratigraphic traps where the oil and gas can be directly accumulated so as to form oil and gas reservoirs. It is suggested that the oil and gas of the Permian strata in the Zaysan basin is characterized by huge potentials for exploration.