云南含油气区板块构造演化及其含油气性

Evolution of Plate Tectonics and Its Hydrocarbon,Bearing Property in Yunnan Petroliferous Region.

云南省及其邻近地区经历了自元古代晋宁运动至新生代喜马拉雅运动的强烈改造,形成了复杂的地质结构和沉积类型。以板块构造演化入手详细地研究了该区的构造、沉积特征及含油气性。指出在云南省境内呈东西向展布的楚雄、思茅-兰坪、南盘江、西昌-昆明、保山5个盆地,沉积岩总面积约16×104km2,若考虑到邻省面积则可达20×104km2;它们都是长期发展的叠合型含油气盆地,发育着海相震旦-下古生界,海相和海陆交互相的上古生界-上三叠统及陆相中-新生界3大套含油建造,具备了形成油气富集区的基本地质条件,应着手编制我国西南地区云南省的近、远期油气勘探规划,以期有所突破。

Yunnan province and its adjacent areas underwent strong modification from Proterozoic Jinning movement to Cenozoic Himalayan movement,followed by shaping complex geologic structures and sedimentary formations. Started with evolution of plate tectonics,this paper presents a detailed research of the structural and sedimentary features and hydrocarbon,bearing properties in these areas,and suggests that there are 5 basins such as Chuxiong,Simao,Lanping,Nanpanjiang,Xichang,Kunming and Baoshan in east,west orientation distributed within Yunnan province,with total areas of sedimentary rocks of 16×104 km2,or 20×104 km2 if adding adjacent provincial areas. These basins are all long developed coincidence,like petroliferous basins with three sets of hydrocarbon,bearing formations composed of marine Sinian System,Lower Paleozoic,marine and continental,marine interactive Upper Paleozoic,Upper Triassic as well as continental Mesozoic,Cenozoic. Hence,these basins possess basic geologic conditions for forming oil,gas enriched province. Should commence workout of near,and long,term layout for petroleum exploration in Yunnan province and adjacent areas of southwest China,looking forward to have a breakthrough.