鲁北济阳坳陷东营凹陷南坡沙河街组第四段上亚段高分辨率层序地层格架     

戴朝强  张金亮 《地质通报》2006,(Z2)

应用高分辨率层序地层学与沉积学等理论,通过对地震、录井、测井资料的分析,对鲁北东营凹陷南坡沙河街组第四段上亚段进行了高分辨率层序地层学的划分与对比,总结出各层序地层单元及其界面在录井和地震资料中的判识标志,把研究区基准面旋回划分为短期、中期和长期3个级别的旋回层序。整个沙河街组第四段上亚段由一个长期基准面旋回组成,并划分出5个中期基准面旋回,首次建立了研究区内该亚段高分辨率层序地层格架,有利于东营凹陷南坡该亚段沉积微相和储层结构描述等精细地质研究的进一步开展。  相似文献   

大地电磁与地震资料仿真退火约束联合反演   总被引：32，自引：11，他引：21  

杨辉  王家林  吴健生  于鹏  王小牧 《地球物理学报》2002,45(5):723-734

在对仿真退火算法研究的基础上,将非常快速仿真退火的连续模型空间改为可变的离散化形式,理论模型试算表明,使用本文方法可提高工作效率5-10倍. 为适应联合反演的需要, 对非常快速仿真退火的误差"单判断"检验准则改为误差"双判断"检验准则,避免Metrop olis接受准则的判断失误. 在此基础上,实现了一维及二维起伏地形条件下大地电磁与地震资料多参量信息的联合反演. 理论模型的试算及实例说明了约束联合反演的有效性.  相似文献   

TSIP中期地震预报方法在辽宁地区的应用与研究     

郭育  蒋秀琴 《东北地震研究》1998,14(2):35-42

本文用ＣＮ算法研究了辽宁省两个地震重点监视防御区的中强震前的强震发生概率增长时间,结果表明预测效果较好,有震报准率为９０％,ＴＩＰ预测警戒占时空率为３０％左右,Ｒ值评分为０．６左右。在ＴＩＰ预测的基础上,进一步用ＳＩＰ方法分析这两个区域的空间背景发震概率的不均匀分布。综合应用ＴＩＰ方法和ＳＩＰ方法,对辽宁省及邻近地区进行了试验性地震预报。  相似文献   

Intelligence-Aided Seismic Zonation System IASHES     

Liu Human  Zhu Min  Pan Keqi  Yang Liping  Tao Xiaxin  Zhang Yuming  Dong Ruishu  Wang Liangmou  and Du RuimingInstitute of Engineering Mechanics  SSB  Harbin  China Institute of Geology  SSB  Beijing  China Computer Application Department  Harbin University of Architecture  Engineering  Harbin  China 《中国地震研究》1996,(4)

In this paper,the structure of the intelligence-aided seismic zonation system IASHES and its validation are briefly introduced.Emphasis is placed on the two rank scheme of potential seismic source areas; an expert subsystem for estimating the seismicity trends of rank A source areas; an expert subsystem for delineation of rank B source areas; an expert subsystem for judgment of upper limit of magnitude of rank B source areas,and an improved procedure for determination of weighting factors of rank B source areas,which is specially suitable to ES(Expert systems).  相似文献   

柴达木盆地茫崖坳陷古近系—新近系R_o分布特征及地质意义     

钟建华  郭泽清  杨树锋  刘卫红  陈汉林  黄立功  刘云田  江波  张永庶 《地质学报》2004,78(3)

柴达木盆地西部的茫崖坳陷是青海油田的主力油气产区 ,对该区古近系—新近系镜质组反射率(Ro)进行了系统研究 ,发现其垂向分布有两种规律 :一是 Ro 与垂深有良好的线性关系 ,多分布在坳陷中央 ,反映了沉积环境、物源和构造的稳定性较好 ;二是 Ro 与垂深呈右阶状 ,反映了逆冲叠覆。此外 ,通过 EASY% Ro 方法计算了研究区地层剥蚀厚度 ,认为干柴沟—油泉子为英雄岭隆起的主轴 ,因为剥蚀了 36 0 0～ 375 0 m,所以英雄岭主峰在地形上呈现出隆起主轴的假貌。通过地层剥蚀厚度的研究 ,还发现油气田主要分布在剥蚀梯度带上。这一结论对柴达木盆地油气勘探开发具有重要意义  相似文献   

The Shengli I Point Bar on the Yellow River Delta: Three-Dimensional Structures and Their Evolution   总被引：3，自引：0，他引：3  

ZHONG Jianhu  SHEN Xiaohu  NI Jinren  WANG Guanmin  WEN Zhifeng  WANG Xibin  WANG Haiqiao  LI Li  WU Kongyou  LI Yong  HONG MeiEarth Resource  Information College  Petroleum University of Chin  Dongyin  Shandong Earth Science Department  Zhejiang University  Hangzhou  Zhejiang Center for Environment Science  Peking University  Beijing 《《地质学报》英文版》2002,76(4):463-477

Point bars are well developed on the Yellow River delta, among which the Shengli I point bar is the most typical. The point bar, being about 4 km in length and several tens to more than 100 meters in width, is located on the south side of the Shengli Bridge in Kenli County, Dongying, Shandong. It is a typical fine-grained point bar with silt, which is predominant, some clay and minor plant debris and clay boulders. The Shengli I point bar has complicated 3-D structures. Firstly, in a plane view, it comprises mainly eight sedimentary units, bar edge, bar ridge, bar platform, bar plain, bar channel, bar gully, bar pond and bar bay, developing side by side and superimposed one by one in a complex way. Secondly, its vertical structures are very complex due to the partial superimposition of the 8 sedimentary units. Besides hydatogenesis, very intensive wind erosion, eolian, ice and meltwater actions are also visible on the Shengli I point bar. The complex form is made even more complicated because of the abo  相似文献   

Analytic Solution of Elasto-Plastic Stress in Infinite Slope under Uniform Load     

WANG Nianxiang GU Lei Senior Engineer  Geotechnical Engineering Department  Nanjing Hydraulic Research Institute  Nanjing  P. R. China. Engineer  Plan  Statistics 《中国海洋工程》1999,(2)

-According to the Mohr-Coulomb yield criterion,the stress field of the infinite slope is derivedunder a vertical uniform load q on the top of the slope.It is indicated that elastic and elasto-plastic stateswould occur in the slope.When q is smaller than the critical load,q_p,the slope is in the elastic state.Ifq equals q_p,the slope is in the critical state,and the plastic deformation would occur along the critical an-gle.With the increase of q,the plastic zone would extend,and the slope is in the elasto-plastic state.Ifq equals limit load,the slope is in the limit equilibrium state.The slope may be divided into three zones.Some charts of the critical angle,the critical and limit load coefficients are presented in this paper.  相似文献   

Numerical Model of Total Sediment Transport in the Yangtze Estuary   总被引：2，自引：2，他引：0  

DOU Xiping LI Tilai  DOU Guoren Senior Engineer  River  Harbour Engineering Department  Nanjing Hydraulic Research Institute  Nanjing  P. R. China Senior Engineer  Nanjing Institute of Hydrology  Water Resourses  Nanjing  P. R. China Academician  Nanjing Hydraulic Research Institute  Nanjing  P. R. China 《中国海洋工程》1999,(3)

Based on the non-equilibrium suspended load transport equation,bed load transport equationand sediment transport capacity formulas derived by Dou et al.,a 2-D numerical model of total sedimenttransport in the Yangtze Estuary is presented.In the model,the actions of tidal currents and wind waves andthe effect of salinity on sediment transport are considered.An automatically generated boundary-fitted grid isused to fit the boundaries of the estuary and the boundaries of engineering projects.The verification of calcu-lations shows that the sediment concentration,the deformation of riverbed and siltation in the channels causedby typhoons can be successfully simulated.  相似文献   

Using a dynamical advection to reconstruct a part of the SSH evolution in the context of SWOT,application to the Mediterranean Sea   总被引：1，自引：1，他引：0  

Marine Rogé  Rosemary Morrow  Clément Ubelmann  Gérald Dibarboure 《Ocean Dynamics》2017,67(8):1047-1066

The main oceanographic objective of the future SWOT mission is to better characterize the ocean mesoscale and sub-mesoscale circulation, by observing a finer range of ocean topography dynamics down to 20 km wavelength. Despite the very high spatial resolution of the future satellite, it will not capture the time evolution of the shorter mesoscale signals, such as the formation and evolution of small eddies. SWOT will have an exact repeat cycle of 21 days, with near repeats around 5–10 days, depending on the latitude. Here, we investigate a technique to reconstruct the missing 2D SSH signal in the time between two satellite revisits. We use the dynamical interpolation (DI) technique developed by Ubelmann et al. (2015). Based on potential vorticity (hereafter PV) conservation using a one and a half layer quasi-geostrophic model, it features an active advection of the SSH field. This model has been tested in energetic open ocean regions such as the Gulf Stream and the Californian Current, and has given promising results. Here, we test this model in the Western Mediterranean Sea, a lower energy region with complex small scale physics, and compare the SSH reconstruction with the high-resolution Symphonie model. We investigate an extension of the simple dynamical model including a separated mean circulation. We find that the DI gives a 16–18% improvement in the reconstruction of the surface height and eddy kinetic energy fields, compared with a simple linear interpolation, and a 37% improvement in the Northern Current subregion. Reconstruction errors are higher during winter and autumn but statistically, the improvement from the DI is also better for these seasons.  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