中国中新生界沉积盆地与油气成藏

中国中新生代沉积盆地是在多种大陆动力学体制下形成和发展演化的,不同板块边界条件、岩石圈变形机制和地幔热状态等因素制约了中新生代沉积盆地不同的发展过程。古气候条件是控制中新生代沉积盆地有机质形成和分布的重要因素。多次潮湿与干旱气候的交替形成了多个有利生油岩系。有机质热演化程度使沉积盆地成烃过程复杂多样,成烃门限也存在很大差异。多旋回构造运动使中新生代沉积盆地具有多个含油气系统的横向迁移和垂向叠置以及多个关键时刻的鲜明特点。油气往往存在多次运移,盆地内的油气藏往往是后期改造、调整和破坏的结果。

GEOLOGY FEATURES AND PETROLEUM RESERVOIRFORMATION IN MESO-CENOZOIC SEDIMENTARYBASINS IN CHINA

The formation of Meso-Cenozoic sedi mentary basins in China was controlled by several continental geodynamic systems.The plate bound ary condition,lithosphere distortion mechanism and mantle thermal status restricted the different evo lution processes and geologic featu res of Meso-Cenozoic basins.The pale-o-climate condition is a very important factor for the formation and occu rrence of organic matters in those basins.The multiple alternations o f humidity and aridity climate came i nto being several available source rock systems.The difference of orga nic matter thermal evolution extent made the petroleum formation process very complicated and various in diff erence basins.Due to multiple gyrations of tectonic movement in the Mesozoic and Cenozoic,the sediment ary basins have several petroleum sy stems coupling together laterally a nd vertically.The oil &gas migration o ccurred several times controlled by tectonic movements,which shows us a final result of reservoir distribu tion after multiple reconstruction s,modifications or destructions.