摘要
松辽盆地地下水动力场具有明显的不对称性：盆地北部大气水下渗形成向心流；中央坳陷区发育泥岩压榨水形成的离心流和越流泄水；盆地南部以越流—蒸发泄水为特征，只有盆地边缘和隆起区的顶部有大气水下渗。泥岩压榨水形成的离心流是松辽盆地油气运移的主要动力。古水文地质的旋回性和离心流的阶段性，决定了油气的阶段性运移和在一个独立水动力体系内多个油环在内，气环在外。
The hydrodynamics field in the Songliao basin is obviously asymmetrical with the characteristics of gravityinduced centripetal flow recharged by meteoric water mainly in its northern region, centrifugal flow and crossformational flow in the basin center area,groundwater discharged by crossformational flow and evaporation in its southern area,and meteoric water permeating downwards only along the basin rim and uplifted areas locally and unabidingly. Centrifugal flow caused by mudstonecompacted water is the main dynamic force which induces the petroleum migration and accumulation in the Songliao basin. Paleohydrogeologic cycles and centrifugal flow stages induced the migration by stages and stepmannular distribution of oil and gas in an independent hydrodynamic system. Multidepressions for the Songliao basin would have developped several hydrodynamic systems. Of which two major ones are located at the Sanzhao and QijiaGulong depressinons,and they made up a double stepannular distribution of oil and gas in the Songliao basin. Inside are multirings of oil, which are encapsulated by uncontinuous natural gas pools. All of them are concentric with their depressions mainly due to symmetric and concentric centrifugal flow.
出处
《沉积学报》
CAS
CSCD
北大核心
1997年第4期115-120,共6页
Acta Sedimentologica Sinica
关键词
水动力
油气运移
盆地
油气聚集
地下水
油气藏
hydrodynamics,migration and accumulation of oil and gas,Songliao basin
