黄骅坳陷港西开发区新近系明化镇组沉积微相三维建模   总被引：9，自引：3，他引：9       下载免费PDF全文

武军昌  吴胜和  尹伟  卢凤鸣  石占中  窦松江 《古地理学报》2002,4(4):39-46

本文以黄骅坳陷港西开发区为例，探讨在油田开发阶段，如何通过密井网区沉积微相定量几何学数据对新近系明化镇组沉积环境相似的稀井网区进行沉积微相三维建模的方法。密井网区研究表明，港西开发区河流相的单河道砂体宽度约50-300 m，一般为100-200 m，厚度约5-15 m，一般为6-10 m；漫溢砂体长、宽一般小于200 m；砂体结构主要为迷宫状和拼合板状两种型式。应用密井网区沉积微相定量几何学数据，采用标点过程方法，对井网较稀的目标研究区进行了三维沉积微相建模研究，并取得了良好的应用效果。  相似文献   

渤海,黄海及沿岸强震聚类分析     

刁桂苓  王俊国 《华北地震科学》1999,17(2):6-12

采用聚类分析方法,研究了渤海、黄海及沿岸强震（Ｍ≥６）的空间分布。研究结果划分出了强震活动区及一些离散发生的强震。渤海的强震往往参与河北、山东、辽宁沿岸的强震分期、分区活动,且以强度高为特征;南黄海强震区自成体系,存在多期活动,与沿岸强震关系不大,以频度高为特点;北黄海内呈弱活动区的状态;朝鲜半岛强震独立成区,未向黄海内部延伸。文中给出分区的构造解释,并提出海域强震存在时空差异,在沿岸及海洋的防震  相似文献   

石油深井地震观测中“井管突升,地面崩裂”异常机理及其社会影响对策研究     

李一兵 《华北地震科学》1999,17(1):9-16

１９７９年以来,天津地区先后有９口石油深井出现了“井管突升,地面崩裂”异常现象,本文通过这９口井的基本情况,分布特点,异常类型等方面的分析,对这一现象产生的机理进行了研究;认为;这一现象的发生是由于地面局部沉降的结果,并对其进行数值模拟,力学解释,同时提出了安定社会的三项对策。  相似文献   

Numerical Simulation of Wave Field at the Kemena River Mouth in Kalimantan Island     

CHEN Yang SUN Jingshi Associate Professor  Tianjin Research Institute of Water Transport Engineering  Tianjin  P. R. China. Professor  Tianjin Research Institute of Water Transport Engineering  Tianjin  P. R. China. 《中国海洋工程》1999,(2)

-By use of the parabolic equation of numerical simulation of wave which is suitable forlarge-angle propagation and Crank-Nicolson differential method,the wave field at the Kemema Rivermouth has been studied for analysis of sediment movement in the area.In order to reflect wave energy lossaccurately,the Bretchneider-Reid formula is quoted and the friction coefficient in the formula is discussedin this paper.The calculation results indicate that the wave becomes a little damped at the mouth ofKemena River influenced by the topography and bottom friction,and the wave at the east beach is higherthan that at the west beach,because the east beach extends out.  相似文献   

Coupling Effect of Riser on Integrated FPS in Deepwater Area     

韩志强  Bernt J.Leira  李飒 《中国海洋工程》2009,23(4):613-622

The main challenge in predicting global responses of floating vessels in deepwater and ultra-deepwater areas comes from the system's coupled effect.In this paper,the coupled approach is used to analyze effects of riser on floating system in deepwater.The analysis results show that the coupling effects of risers will mainly affect the low frequency (LF) motions of the system.That is because risers will provide the system with a significant low frequency (LF) damping which will vary with the sea states.Under ...  相似文献   

A Three-Dimensional Nearshore Hydrodynamic Model with Depth-Dependent Radiation Stresses   总被引：2，自引：0，他引：2  

吴相忠  张庆河 《中国海洋工程》2009,23(2):291-302

For the simulation of the three-dimensional (3D) nearshore circulation,a 3D hydrodynamic model is developed by taking into account the depth-dependent radiation stresses.Expressions for depth-depeedent radiation stresses in the Cartsian coordinates are introduced on the basis of the linear wave theory,and then vertical variations of depth-dependent radiation stresses are discussed.The 3D hydrodynamic model of EICIRC (Eulerian-Lagrangian CIRCulation) is extended by adding the terms of the depth-dependent or depth-averaged radiation stresses in the momentum equations.The wave set-up,set-down and undertow are simulated by the extended ELCIRC model based on the wave fields provided by the experiment or the REF/DIF wave model.The simulated results with the depth-dependent and depth-averaged radiation stresses both show good agreement with the experimental data for wave set-up and set-down.The undertow profiles predicted by the model with the depth-dependent radiation stresses are also consistent with the experimental results,while the model with the depth-averaged radiation stresses can not reflect the vertical distribution of undertow.  相似文献   

Analysis on Motion and Cable Dynamic Tension for An ALT-Tanker System     

李红霞  唐友刚  刘利琴  张若瑜 《中国海洋工程》2009,23(2):355-366

A two-degree freedom model for an ALT-tanker system is established corresponding to the pitch of the ALT and the surge of the tanker.Tension in the mooring cable between the ALT and the tanker is represented by an unsymmetrical,piecewise-nonlinear function.Wave load on the tower is evaluated by use of the Morison equation.The first order wave load acting on the tanker is calculated by the linear diffraction theory based on the 2-D Helmholtz equation,and the near field approach of Pinkster is used to evaluate the second order drift force.The dynamic equation of motion is established based on the principle of D'lembert.Dynamic response and cable tension of a mooring system composed of an 88.4 m ALT and a 100000 t grade tanker are calculated.The influence of wave frequency,wave excitation amplitude,wind and current force on ALT-tanker motion and cable tension is discussed.  相似文献   

云南地区现今地壳水平运动与变形特征   总被引：10，自引：4，他引：6  

杨国华  王琪  王敏  周晓燕  韩月萍 《大地测量与地球动力学》2003,23(2):7-14

利用云南地区 1999、2 0 0 0、2 0 0 1年共 10 0余个测站的GPS资料 ,获得了该区现今水平运动与形变的特征图像。研究结果认为 :①根据变形与运动特征 ,云南地区可划分为 4个运动单元 ,即滇西地区、滇东地区、滇中东北地区和滇中西南地区 ;剔除整体运动后 ,它们的优势水平运动分别为 :滇西地区以 5 .2± 0 .6mm/a向W 31°N运动 ,滇东地区以 4 .8± 1.8mm/a向E2 6°N运动 ,滇中东北地区以 5 .2± 0 .6mm/a向S4 4°E运动 ,滇中西南地区则基本不动。②相邻单元的平均差异运动分别为 :滇西地区相对滇中东北地区的运动为 10 .9± 1.1mm/a ,方向为W 39°N(张性右旋 ) ,相对滇中西南地区的运动为 5 .3± 1.3mm/a ,方向为W 4 1°N(右旋 ) ;滇中东北地区相对滇中西南地区的运动为 5 .6± 1.6mm/a ,方向为E36°S(左旋 ) ;滇东地区相对滇中东北地区的运动为 6 .2± 1.6mm/a ,方向为N3°E(左旋 )。③从断裂走滑活动看 ,红河断裂两侧的差异运动并不是由红河断裂的活动所形成的 ,而是在很广阔的空间上自西向东渐变而成的 ,跨距达数百km ;小江断裂两侧的差异运动也非完全是小江断裂本身的活动 ,差异运动的渐变空间至少在 6 0km以上。④云南地区的地壳运动方式可能是“断块活动”和“连续变形”的组合 ,或许“连续变形”  相似文献   

华北地区古元古代真核生物化石   总被引：14，自引：1，他引：13  

孙淑芬  朱士兴 《地质学报》2000,74(2):116-122,T002

在华北地区古元古代滹沱属豆村亚群的大石岭组、青石村组（约２５００～２４００Ｍa） 和长城群的常州沟组、串岭沟组（１８００～１７００Ｍa）中存在着大直径的球形态呈三 角形、多角形及船形微古植物,根据它们的大小、外部开矿和内部结构等综合判别,它们可难属于单细胞真核浮游生物。这些资料表明,地球早期单细胞真核生物可能始于古元古代早期的滹沱群底部（约２５００～２４００Ｍa）,而到古元古代晚期的长城群（１８００～  相似文献   

吕梁地区早前寒武纪主要地质事件的年代框架   总被引：37，自引：1，他引：36  

耿元生  李惠民 《地质学报》2000,74(3):216-223

通过同位素地质年代学研究初步建立的吕梁山地区早前寒武纪主要地质事件的年代格架是：界河口群形成在２６００～２４００Ｍａ期间。吕梁群近周峪组火山岩形成在２３６０～２３５０Ｍａ期间,２１２４Ｍａ时野鸡山群白龙山组火山喷发。赤坚岭杂岩约在２１５０Ｍａ时侵位,随后发生了钾质花岗岩的侵入（２０３１Ｍａ左右）,界河口群和吕梁山群都爱到这次构造热事件的影响。芦芽山紫苏花岗岩在１８００Ｍａ左右侵位。  相似文献