Origin and Evolution of the Hydrodynamics in Sedimentary Basins——A case study of the Songliao Basin
-
摘要: 盆地地下水动力场的形成演化与油气运移、聚集关系密切。由多个水动力体系组成的松辽盆地地下水动力场的形成与演化在平面上具有明显的不对称性,总体上盆地北部为大气水下渗向心流区;中央坳陷区为离心流区和越流泄水区;盆地南部以地下水的越流—蒸发泄水浓缩为主要特征,盆地边缘和隆起剥蚀区的局部地区为大气水下渗区。且形成在地层压力、流动方向、流体势、垂直压力梯度等方面各具特征的局部水动力单元。同时,地下水动力场的形成与演化具有阶段性,其水动力强度在纵向上具有分带性,由浅到深,可以划分出强、弱、停滞3个带。Abstract: Origin and evolution of the hydrodynamics has important relationship with the migration and accumulation of petroleum in sedimentary basins. The hydrodynamics made of several hydrodynamic systems in the Songliao basin is asymmetrical obviously, with the characteristics of gravityinduced centripetal flow recharged by meteoric water mainly at its northern and northeastern regions, centrifugal flow and crossformational flow at the basin center area, as well as crossformational flowevaporation at its southern area. And every hydrodynamic unit of the hydrodynamics in the Songliao basin has its own characters in aspects of stratum pressure, the waterflow direction, potential level and vertical pressure grads. Meanwhile, the origin and evolution of the hydrodynamics is characterized by stages, and its intensity has the property of vertical zonation, with the depth increasing, strong, weak and stagnant waterzones could be divided.
-

计量
- 文章访问数: 1745
- HTML全文浏览量: 2
- PDF下载量: 665
- 被引次数: 0