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在三塘湖盆地地层压力纵向与横向分布特征分析的基础上,通过各种地质条件相结合对地层压力分布的影响因素进行了分析。认为三塘湖盆地地层压力总体不高,不同层位的地层压力在盆地南部高于北部,浅部地层为低压,深部地层为高压,压力与深度变化趋势线和静水压力变化趋势线斜交。浅部位的较低压力与潜水面的深度较大有关,深部位和盆地南部相对较高的压力主要与构造挤压作用有关,局部偏离压力变化趋势的地层压力主要与油水密度差有关。盆地现今的地层压力分布格局主要与潜水面、构造挤压作用对不同部位地层压力的影响程度不同有关。
Based on the analysis of vertical and horizontal distribution of formation pressure in Santanghu Basin, the influencing factors of formation pressure distribution are analyzed through various geological conditions. The formation pressure in the Santanghu Basin is generally not high. The pressure in different layers is higher in the south of the basin than in the north and shallow in the lower strata, while in the deep strata it is high pressure. The trend line of pressure and depth and the trend of hydrostatic pressure are skewed. The lower pressure in the shallow part is related to the larger depth of the submerged surface. The relatively higher pressure in the deep part and the southern part of the basin is mainly related to the tectonic extrusion. The formation pressure that deviates locally from the pressure is mainly related to the difference in oil-water density. The current formation pressure distribution pattern in the basin is mainly related to the different degrees of influence of subducting surface and tectonic extrusion on formation pressure in different parts.