油田水动力系统与油气藏的形成   总被引：6，自引：0，他引：6  

陈建文  厉玉乐  孙德君  闫同生 《海洋地质与第四纪地质》1999,19(4):31-38

油田水中存在“沉积承压水”和“地表渗入水”两个相对独立而又相互作用的水动力系统,前者由上覆地层重量所引起的地静压力以及地静压力等引起的异常孔隙流体压力所形成,具有内循环承压式水交替特征,后者为大气降水和地表水向储集层的渗入而形成,以外循环渗入或水交替为特征。这两大系统（尤其是前者）的作用在很大程度上控制了含油气盆地中油气的运移、聚集和保存,油气聚集区主要位于水文地质带中的交管阻滞一停滞带内,沉积交替强度的低值区是油气富集区,沉积水的离心流使凹陷中的油气围绕凹陷中心呈带状分布。  相似文献   

Hydrodynamic Forces on Smooth Inclined Cyh''''nders in Oscillatory Flow     

Kang Haigui Asscociate Professor 《中国海洋工程》1994,(3)

-The hydrodynamic forces on a smooth inclined circular cylinder exposed to oscillating flow were experimentally investigated at Reynolds number (Re) in the range 40000-200000 and Keulegan-Capenter number (KC) in the interval from 5-40. In the test, Re number and KC number were varied systematically. The inertia force coefficient (Cu) and the drag force coefficient (CD) in Morison equation were determined from the measured loads and the water particle kinematics. In this analysis a modified form of Morison equation was used since it uses the normal velocity and acceleration. Thus, the applicability of the Cross Flow Principle was assumed. This principle, simply stated, is as follows: the force acting in the direction normal to the axis of a cylinder placed at some oblique angle with the direction of flow is expressed in terms of the normal component of flow only, and the axial component is disregarded. Both the total in-line force coefficient (CF) and transverse force (lift) coefficient (Cf) were analyzed  相似文献   

Comparison of two three-dimensional hydrodynamic modeling systems for coastal tidal motion     

Q.Y. Zhang   《Ocean Engineering》2006,33(2):137-151

A comparison of two three-dimensional numerical modeling systems for tidal elevations and velocities in the coastal waters is presented. The two modeling systems are: (1) the Princeton Ocean Model (POM) and (2) the MIKE 3 flow model. The model performance results for Singapore's coastal waters show that the predicted tidal elevations from the two hydrodynamic modeling systems are almost identical and are in very good agreement with field measurement data. The simulated tidal current velocities match well with field measurement data at the selected stations, but it seems that the POM provides the slightly better simulation, compared to the MIKE 3 flow model. The depth profiles of the velocities obtained from the two modeling systems may be greatly different at some time, due to the vertical diffusion coefficient calculated from different turbulent sub-models in the two modeling systems. The POM generally predicts larger peak tidal velocities. The maximum speed differences for the model results from the two modeling systems occur in the top and differ from time to time and from location to location, reaching up to 20%.  相似文献   

Treatment of Hydrodynamic Loading for Random Sea State     

Anjan Sarkar  Suhail Ahmad  T. K. Datta M. Tech. Student Assistant Professor 《中国海洋工程》1996,(3)

- In order to employ cost effective frequency domain analysis for off-shore structures treatment of hydrodynamic loading is essential. Drag and inertia dominated, resonating and antiresonating cases under random sea states are analyzed to highlight the implications and relative merits of four salient linearization techniques.  相似文献   

Fluid forces on a small cylinder in the presence of a large cylinder in relative oscillatory flow     

C.H.K. Williamson 《Applied Ocean Research》1985,7(3):124-127

The present brief paper is intended to show that the fluid forces on a small cylinder can be considerably magnified when it is in the flow field of a larger cylinder. Two cylinders of unequal diameter are oscillated in a tank of fluid, and the lift and in-line forces on the smaller cylinder are measured when the pair of cylinders is placed at various orientations and spacings.  相似文献   

长江口三维潮流数值计算及动力分析   总被引：10，自引：1，他引：10  

于凤香  宋志尧  李瑞杰 《海洋湖沼通报》2003,(3):14-23

采用三维动力学数学模型对长江口潮流场进行了计算，对长江口潮流流态在一个潮周期内逐时进行了分析，并对长江口南支盐水倒灌从动力学角度进行了初步探讨。计算结果表明：文中模型较好地重演长江口潮流场，可以用于大型复杂河口工程实际中的潮流场的计算和分析。  相似文献   

厦门港水动力因素低频波动特征及其机制分析     

王寿景  李立 《台湾海峡》1993,12(4):303-311

本文根据历史水文气象资料，用条件谱分析方法，分析了厦门港水动力因素低频波动特征并探讨其发生机制。结果表明，低频波动清楚地表现为水位和表层盐度的波动。厦门港水位的低频波动主要源自平潭站的水位波动，风的贡献是次要的；条件谱分析了难以描述表层盐度低频波动和九江径流波动的复杂关系。  相似文献   

SPATIAL DISTRIBUTION OF NUTRIENTS OF SHALLOW LAKE IN THE ZHALONG WETLAND   总被引：1，自引：1，他引：1  

WANG Lei ZHANG Guang-Xin 《湿地科学》2006,4(3):193-197

1 INTRODUCTIONNitrogen and phosphorus in the water are the nu-trients limited in natural wetlands,which seriously in-fluence on the ecosystem production and the biodiver-sity(Mitsch,Grosselin,2000).Nitrogen and phos-phorus recycles have been interrupted b…  相似文献   

Time domain Gauss–Newton seismic waveform inversion in elastic media     

Dong-Hoon Sheen  Kagan Tuncay  Chang-Eob Baag  Peter J. Ortoleva 《Geophysical Journal International》2006,167(3):1373-1384

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Fréchet kernels for body-wave amplitudes     

F. A. Dahlen  Adam M. Baig 《Geophysical Journal International》2002,150(2):440-466

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