Organism relics or kerogens in oils as oil-source rock correlation indicator     

Suping Yao  Jingrong Zhang  Kuili Jin 《中国科学D辑(英文版)》1997,40(3):253-258

Organism relics or kerogens in oils are first obsenred by a confocal laser scanning microscope (CLSM) and a transmission electron microscope (TEM). The complexes of kerogens in oils are characterized by the presence of a great variety of microfossils or macerals. These kerogens in oils are mainly the residues of the original organic substances from which oil formed, and minor kerogens from enclosing rocks enter the oils, therefore, the components and types of the kerogens in crude oils can serve as an indirect indicator of oil-source rock correlation. This method was applied to Jurassic oils in the Junggar Basin and the Turpan-Hami Basin, and there are two types of the kerogens in oils: one containing a lot of macerals from terrestrial plants may derive from coals, and the other, characterized by a high content of microscopic algae, fungus spores and Acritarch, may originate from Permian organic matter. In addition, the reflectance of the vitrodetrinites in oils can be used as an indicator of oil-source rock correlation.  相似文献   

扬子板块石炭纪沉积层序及其全球性对比研究   总被引：8，自引：3，他引：8  

李儒峰  刘本培 《沉积学报》1997,15(3):23-28

通过对石炭纪扬子板块内部、扬子板块与华北板块及扬子板块与欧美板块之间的不同级别沉积层序对比研究，编制了扬子板块、华北板块和欧美板块石炭纪的海平面变化曲线。在扬子板块内部，上、下扬子区２级沉积层序可以进行对比，但下扬子区海进和海岸上超滞后于上扬子区，由于资料的限制，３级沉积层序的对比还有困难；华北板块Ｆｕｓｕｌｉｎａ－Ｆｕｓｕｌｉｎｅｌａ带内的一个３级沉积层序和Ｔｒｉｔｉｃｉｔｅｓ－Ｐｅｕｄｏｓｃｈｗａｇｅｒｉｎａ带内的四个３级沉积层序，可以和扬子板块同期的３级沉积层序对比；扬子板块和北美中大陆不仅３级沉积层序可以对比，而且在晚石炭世Ｇｚｈｅｌｉａｎ期４级沉积层序也可以进行对比，但由于它们大地构造背景的差异，导致沉积层序组成内容的不同。上述对比结果被认为是冰川型全球海平面变化所形成全球沉积记录同时性的证据。并以冰期与非冰期、联合古陆形成前后等方面对相同板块内和不同板块间沉积层序的数量和级别的异同原因进行了探讨，认为石炭纪冈瓦纳大陆冰川消长是控制全球海平面变化的主要因素，因此，沉积层序应具全球同时性和可对比性，但局部沉积条件差异也将影响沉积层序组成。  相似文献   

塔里木盆地油气资源的基本特征   总被引：3，自引：0，他引：3  

陈正辅 《海相油气地质》1997,2(1):15-20

塔里木盆地成油气地质历史条件复杂，盆地内海陆相油气、不同成藏期油气、不同成熟度以及不同保存条件的油气并存。具海相古生界及陆相中－新生界两大烃源岩系，前者以奥陶系和石炭系为最好源岩，后者以三叠系和侏罗系最佳。烃源对比结果比较全面地反映了这一特点。石炭系、三叠系、白垩系和中新统均为重要的储油层系，其储集岩类古生界主要为白云岩，次为石灰岩，中－新生界主要为砂岩。成藏类型可分为六种：古生古储、后生古储、后  相似文献   

Fundamental study on the response characteristics of drivers during an earthquake based on driving simulator experiments     

Yoshihisa Maruyama  Fumio Yamazaki 《地震工程与结构动力学》2004,33(6):775-792

After the 1995 Kobe earthquake, the expressway structures in Japan were retrofitted and they will not now be seriously damaged under a certain level of strong earthquake motion. However, the stability of a moving vehicle has not been investigated yet. It has been reported that drivers feel seismically induced vibrations, especially in the transverse direction of vehicles. Owing to this phenomenon, drivers have some difficulty in controlling the vehicles during strong shaking. For further safety promotion of the expressway networks, it is important to understand the drivers' reactions to seismic motion. The present authors have performed a series of seismic response analyses of a moving vehicle to investigate its response characteristics based on numerical simulation. However, the responses of the driver were not considered in the simulation process. In order to investigate the drivers' reactions during an earthquake, a series of virtual tests were conducted using a driving simulator. This driving simulator has six servomotor‐powered electric actuators that control its motions. Several types of tests were carried out for different examinees to investigate drivers' responses while controlling the simulator under seismic motion. The results of this study showed that a larger response time lag to strong shaking and over turning of the steering wheel may shift the vehicle into the next lane. According to this finding, trafficaccidents could possibly occur under strong ground shaking in the case of heavy traffic. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   

2003 - 08 - 24 咸阳市大暴雨过程分析          下载免费PDF全文

王索民  李祥林 《山西气象》2004,(3):7-9

利用高空、地面天气图、红外云图、多普勒雷达图等资料对临汾市2004年6月16日局地降雹的天气背景、形势演变、层结稳定度、云图和雷达回波等变化特征进行了综合分析，结合以往冰雹预报经验对新一代雷达的探测能力进行了初步检验。分析发现，这次降雹过程属典型的西北冷涡影响型，此类型降雹相对于西北气流型和西风槽型降雹具有其自身特征；从多普勒速度图上，可分析出降雹过程中飑线前后较明显的中尺度天气系统。  相似文献   

高密度电法中的"异常扩展效应"及归位计算方法   总被引：1，自引：0，他引：1  

冯兵  张兴安  李有青 《物探与化探》2004,28(4):349-351,376

对高密度电法勘探的异常扩展效应问题进行了较深人的分析；提出了利用相关分析进行归位计算的方法。通过对球体及板状体的Pole-Pole、Wanner-alpha装置的异常归位计算，表明该方法对复杂异常的解释具有效果。  相似文献   

水质大涡模拟数学模型研究   总被引：2，自引：0，他引：2       下载免费PDF全文

张昌兵  熊朝坤  桂林  刘华  莫政宇 《水科学进展》2004,15(4):431-435

建立了基于弱可压缩流基础上的水质大涡模拟数学模型及污染物质扩散系数与平均运动的关系。数值计算采用有限体积法和预测校正法,固壁边界条件采用"部分滑移条件"。并应用该模型对重庆嘉陵江、长江两江交汇段的流场,污染物质浓度分布进行了计算,计算结果与实测值比较吻合。研究表明,横向扩散与流动状态有关,当支流流量相对较小时,横向扩散较弱,形成岸边污染带,当支流流量相对较大时,横向扩散较强,污染带向江心移动。  相似文献   

地下水水位时间序列中的混沌特征   总被引：20，自引：0，他引：20  

宋宇  陈家军  孙雄 《水文地质工程地质》2004,31(1):14-18

利用相空间重构技术、G -P算法以及Wolf提出的从单变量中提取Lyapunov指数的方法 ,分别计算了太原盆地 4组地下水水位时间序列的关联维数和Lyapunov指数。结果揭示在自然状态下 ,太原盆地某些孔隙潜水和孔隙承压水水位变化存在明显的混沌特征。这不仅为以后建立水位预测模型提供了理论依据 ,并且也为运用分形理论研究地质参数的时空变异性以及含水层结构的自相似性提供了进一步的支持。  相似文献   

鲁西南深埋粘性土物理力学指标多元统计研究   总被引：2，自引：0，他引：2  

孙如华  李文平 《水文地质工程地质》2004,31(2):37-40

运用R因子分析和R型聚类两种多元统计分析方法,对鲁西南地区深埋粘性土的20组样的8个物理力学指标数据进行了分析。利用R因子分析方法,揭示了各指标对鲁西南地区深埋粘性土状态和力学性质的影响关系。利用R型聚类分析方法,研究了深部粘性土各物理力学指标之间的相关性,为进一步从物理力学指标对深埋粘性土的特殊状态和力学特性的研究打下基础。  相似文献   

Correlation distance of waveforms for closely located events—I. Implication of the heterogeneous structure around the source region of the 1995 Hyogo-Ken Nanbu, Japan, earthquake (M_w= 6.9)     

Hisashi Nakahara 《Geophysical Journal International》2004,157(3):1255-1268

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