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盆地古地下水动力是油气成藏过程的重要动力,但尚未检索到盆地三维古水动力场演化动态数值模拟方法研究的文献。从盆地演化地质模型出发,综合考虑盆地古地形、沉积压实水、地表渗入水、地层渗流性质和盆地构造演化特征等因素,建立了三维古水动力演化数值模拟模型,能够反映非均质各向异性条件下地下水的流动规律。应用该模型可以定量模拟各地质阶段盆地各地层的三维流势场、流速场、流向场,还可计算地层水交替次数,从而再现各构造运动时期的地下水活动史。用该方法对塔里木盆地现有的实际资料进行了实算模拟,获得了丰富的计算成果和大量成果图件,表明该方法具有使用和推广价值。图3彩图3参6(王孝陵摘)
The paleo-groundwater hydrodynamics in the basin is an important driving force for the hydrocarbon accumulation process. However, no literature has been retrieved on the numerical simulation of the evolution of the three-dimensional paleo-hydrodynamic field in the basin. Based on the evolution geologic model of the basin and considering the paleogeography, sedimentary compaction water, seepage water in the basin, seepage properties of the strata and tectonic evolution characteristics of the basin, a three-dimensional paleo-hydrodynamic evolution numerical simulation model is established, which can reflect heterogeneity Groundwater flow in the direction of anisotropy. The model can quantitatively simulate the three-dimensional flow field, velocity field and flow field of various strata in various geologic stages, and calculate the alternation times of formation water to reproduce the history of groundwater activities in each tectonic movement period. The method is applied to actual calculation of actual data in Tarim Basin, and a wealth of calculation results and a large number of results are obtained, which shows that the method has the value of use and promotion. Figure 3 Figure 3 Reference 6 (Wang Xiaoling pick)