中国中西部前陆盆地的油气勘探

PETROLEUM EXPLORATION IN FORELAND BASINS OF WESTERN AND CENTRAL CHINA

典型前陆盆地具有双层结构，即前陆盆地发育前的被动陆缘沉积和前陆盆地本身的沉积建造。中国的前陆盆地独具特色，在分类上大多应归于类前陆盆地。按照发育的时代，中国中西部的前陆盆地可划分为3个世代（古生代、中生代和新生代），中生代前陆盆地的油气是最为现实的勘探富标。前陆盆地的油气潜力主要受控于两个因素，一是油源的丰度，二是后期的保存条件。中国前陆金地的油气勘探应加强盆地下伏地层油气潜力的研究，并避开现个巨厚的磨拉石堆积区。

Typical foreland basins have two-bedded structure, in which the sediments of the foreland basin overlay on the old deposits ofpassive continental margin. The foreland basins in China have their own particular features, and most of them belong to thetype of quasi-foreland basin. In term of occurring time, the foreland basins in China can be divided into three generations(Paleozoic, Mesozoic and Cenozoic ). The Mesozoic foreland basins are the most practical targets for the petroleumexploration. The hydrocarbon potential of the foreland basins in China are mainly controlled by two factors: one is therichness of oil source and another is the later preservation- The petroleum exploration of foreland basins shou1d be based onthe comprehensive study of the sequence below the basin, and meanwhile avoid the area where huge mo1asse sedimentsaccumulated.