Subtle traps prediction using sequence stratigraphy and 3D seismic technology: A case study from Qikou depression in Huanghua basin

Forecasting subtle traps by sequence stratigraphy and 3D seismic data is a sensitive topic in hydrocarbon exploration. Research on subtle traps by geophysical data is the most popular and difficult. Based on the sufficiently drilling data, log data, core data and 3D seismic data, sediment sequence of Qikou depression, Huanghua basin was partitioned by using sequence stratigraphy theory. Each sediment sequence system mode was built. Sediment faces of subtle traps were pointed out. Dominating factors forming subtle traps were analyzed. Sandstone seismic rock physics and its response were studied in Tertiary System. Sandstone geophysical response and elastic modulus vary laws with pressure, temperature, porosity, depth were built. Experimental result and practice shows that it is possible using seismic information forecasting subtle traps. Integrated using geology, log, drilling data, special seismic processing technique, interpretation technique, high precision horizon calibration technique, 3D seismic visualizing interpretation, seismic coherence analysis, attribute analysis, logging-constrained inversion, time frequency analysis, subtle traps object is identified and interpreted. Finally, advantage object of subtle trap in this area was determined. Bottomland sand stratigraphic and lithologic reservoirs in Qinan slope zone have been founded by means of high resolution 3D seismic data field technique, high resolution 3D seismic data processing technique and seismic wave impedence inversion technique. Foundation item: Project(2003034470) supported by the Postdoctoral Science Foundation of China; project supported by the Postdoctoral Science Foundation of Central South University     

DC元数据与网络信息的检索效率

本文通过DC元数据对网络资源的标引和管理特点的分析,说明它是提高网络信息检索效率的一种委朋发展前途的方法。     

用CS5460A构成的单相电能表现场校验仪

着重介绍用CS5460A芯片实现的现场校验仪的硬件框图、软件编程及调试中的关键问题．     

基于KIVA的内燃机燃烧室内湍流流动的数值模拟计算

内燃机缸内湍流的研究是个十分重要而且复杂的课题,数值模拟技术为其提供了有效的研究方法.本文利用CFD软件KIVA分别采用标准k-ε,RNGk-ε模型在无旋流和有旋流的两种工况下,对轴对称的ω型燃烧室内的湍流流动进行二维和三维数值模拟计算,并把计算结果与实验数据进行对比,得到了内燃机缸内湍流流动的特性.本文为内燃机港内湍流研究提供了一种比较好的研究方法,此方法和计算结果为内燃机的性能开发与优化设计提供依据.     

Strengthening steel joint of architectural structure under loading condition

Through the comparative analysis of steel plate reinforced,ceramics reinforced and non-reinforced joints under loading condition,the feasibility of strengthening steel joint of architectural structure was studied.By using element birth and death technology simulation of the fi nite element software ANSYS,it is found that when the reinforced structure is 10 mm in thickness and using steel structure to reinforce the concerned areas,the equivalent stress in concerned regionals reduces by 31.1% compared with that when the structure is not reinforced.When reinforced with ceramics,the equivalent stress in concerned regionals reduces by 24.1% compared with that reinforced with steels;when the reinforced structure is 20 mm in thickness using steels to reinforce the concerned area,the equivalent stress in concerned regionals reduces by 39.4% compared with that when the structure is not reinforced.When using ceramics to reinforce the concerned areas,the equivalent stress only decreases by 3.7% compared with that reinforced with steels.     

储罐区防火堤排污水阀关闭不严属重大安全隐患

对在安全检查中发现储罐区防火堤排污阀关闭不严的情况,从理论及防火堤、排污阀的作用和隐患可能导致的严重后果进行综合分析,认为此种情况应属于重大安全隐患,并列举了防火堤管理方面存在的若干个类似问题,以引起大家的重视。     

基于PTC材料的短路限流保护方案及PTC限流特性研究

分析了现有电力系统短路限流保护技术在低压独立电力系统中应用存在的问题，提出了一种基于PTC材料的可恢复型断路器的拓扑结构并说明其工作原理；完成了PTC热敏电阻应用于蓄电池组电源短路限流的试验测试，给出了不同电流下PTC材料电阻变化过程的试验结果,并对于将PTC材料应用于短路限流保护的电阻变化特性进行了分析，试验表明，应用该拓扑结构限流效果显著，具有良好的应用前景。     

Sulfide assemblages in granulite xenoliths from Hannuoba Basalt, Hebei Province, China

Granulite xenoliths are important samples for understanding the forming and evolution of the crust. The granulite xenoliths enclosed in Cenozoic basalt of Hannuoba, Hebei Province, China, contain four types of sulfide assemblages: isolate rotundity enclosed sulfides, intergranular sulfides between minerals, secondary sulfide inclusions ranging in linear, and fissure-filling sulfides.Electron microprobe analysis shows that the components of sulfides are Ni-poor pyrrhotite with the molar ratios of (Ni Co Cu)/Fe less than 0.2. The molar ratios of (Fe Cu Co Ni)/S are less than 0.875 of normal pyrrhotite, and are less than those of mantle xenoliths, reflecting a sulfur-saturated environment. Pyrrhotite in various occurrences contains some Au and Ag, with the averages of 0.19wt%-0.22wt% Au and 0.01wt%-0.02wt% Ag, showing the gold mineralization related to the granulitization of low crust. Ni, Co and Cu have a normal correlation with S in pyrrhotite, indicating that heavy metal elements have a same source similar to sulfur because of the degasification of upper mantle.     

AD7796在压电陶瓷微驱动器系统中的应用

AD7796是由美国Analog Device公司推出的一种较新的低功耗、低噪声、高精度的16位模数转换器,内部集成了温度传感器,片上仪器放大器倍数为128,适合于小信号直接输入转换.本文介绍了AD7796的基本工作原理、内部结构以及软件设计,并结合压电陶瓷驱动器系统,说明了此芯片在信号采集中的使用方法.     

基于VI的高速数据流盘设计

利用LabVIEW G语言并结合PCI-6024E数据采集卡设计实现了对高速数据的保存与波形再现.这种高速数据流盘充分利用了计算机的存储和与外部设备连接的能力,可以完成多通道数据采集、保存和波形回放,便于数据的保存与波形再现,为后续分析处理数据提供了可靠的依据.硬件系统具有开放性,可以通过修改和增加软件模块来增强和拓展仪器功能.通过仿真实验验证了该仪器能够完成对高速数据的保存和再现,实现理论上所设计的功能.