中文摘要：

含油气沉积盆地地下水动力场可以划分为：①泥岩压实水离心流;②大气水下渗向心流;③（层间）越流、越流-蒸发泄水和④滞流4种局部水动力单元类型。通常盆地边缘大气水不对称下渗,发育向心流,中央凹陷区以泥岩为主的砂泥岩地层压实,发育离心流,大气水下渗向心流与地层压实离心流汇合,发育越流泄水。沉积盆地地下水动力场演化和地下水成因控制了地下水化学场的分布规律。在离心流和向心流流动过程中,地下水浓缩、盐化,在越流泄水区形成高浓缩、高盐化地下水。泥岩压实离心流是沉积盆地油气运移的主要动力之一,在地层压实排水离心流过程中,由于岩性、地层、断层等圈闭使得部分油气在运移过程中聚集;在地下水越流泄水过程中有利于油气大量聚集—富集;在向心流推进过程中,早期聚集的油气可能部分被破坏,此外也可能在特定的地质条件下形成水动力和部分岩性、地层、断层油气藏。

英文摘要：

Hydrodynamic units in a petroliferous sedimentary basin can be categorized as follows. ①compactiondriven centrifugal flow, ② relief-driven centripetal flow, ③ cross-formational flow with/without evaporation and ④ lagged flow. In general, the meteoric water infiltrates asymmetrically in the margin of basin and centripetal flow develops. The central depression is an area of centrifugal flow caused by mudstone-compacted water. Centrifugal flow and centripetal flow converge and result in cross-formational flow. The distributions of hydrochemistry field are controlled by the hydrodynamic evolution and the formation mechanism of groundwater in sedimentary basins. The groundwater concentrated in the cross- formational flow area results in relatively higher concentration. Centrifugal flow driven by sediment compaction is the main driving force of the oil-gas migration and accumulation in the sedimentary basins. During the process of centrifugal flow, part of oil and gas are gathered due to the lithology, stratum, fault and so on. The cross-formational flow area is favorable to abundant oil and gas enrichment. During the process of centripetal flow, the oil and gas accumulated previously may be destroyed partly; maybe form dynamic trap or lithologic trap, stratigraphic trap and fault trap under certain geological conditions.