| 构造应力作用下流体运动的动力学分析——构造流体动力学 |
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| 引用本文：孙雄,洪汉净,马宗晋.1998.构造应力作用下流体运动的动力学分析——构造流体动力学[J].地球学报,19(1):150-157. |
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| 中文摘要:本文从流体动力学的基本规律出发，应用渗流力学、岩土力学及弹性力学的理论及方法，推导出了考虑应力状态的可变形介质中流体运动的动力学方程，由该方程可以看出：应力状态是影响流体运动的一个非常重要的因素，它通过３种方式来影响流体的运动，其一是：应力的作用改变介质的渗透性能，从而影响流体运动；其二是：平均正应力的变化速率影响介质的含流体能力，它以源汇项的形式反映在方程中；其三是：应力的作用影响流场的初始状态及边界状态，通过影响定解条件反映在动力学方程中，从而影响运动特征。构造应力场对流体运动的最终影响是这３方面作用的总效果。作为流体研究的一个实例，油气的运动特征完全符合一般流体的运动规律，本文通过某油田３个时期不同应力状态下油气运移的模拟研究可以看出，在不同的构造应力状态下，油气的运移特征是完全不同的，它从一个侧面反映出应力状态对流体运动的影响。 |
| 中文关键词:构造应力场 流体运动 油气运移 构造流体 |
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| The Influence of Structure Stress on Fluid Movement ——Structure Fluid Dynamics |
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| Abstract:ln this paper, the influence of structure stress field on fluid movement is discussed. In the theoretical aspect, the 3-dimensional dynamic equations of fluid under structuer stresses are derived on the basis of the knowledge of fluid mechanics, mechanics of fluid in porous media and elastic mechanics.By means of numerical models, effect of stresses on oil migration in an oil field is analyzed.A 3-dimensioned unsteady model for this area is established on the basis of knowledge on this region.The specific work and results are as follows: (1)The dynamic equation of fluid movement under 3-dimension is derived. It shows that the state of stress is an important factor affecting fluid movement. (2)The modeling results of an example of oil area show that the effect of topography on oil accumulation is dominant if the function of stress is not considered.It is evidently not in agreement with the actual results of exploration. If the role of stress is considered,the oil accumulation will concentrated near the faults. This is consistent with the present state of exploration in the oil area as well as other oil field area. It demonstrates the significance of effect of stress on oil migration. fluid movement is a complicated process, on which many factors may affect it besides the structure stress field.Single factors have been considered in this study with aim to explain effect of stress on fluid movement from physical mechanism. |
| keywords:structure stress stress field fluid movement oil migration model |
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