Substorm observations in the early morning sector with Equator-S and Geotail

Data from Equator-S and Geotail are used to study the dynamics of the plasma sheet observed during a substorm with multiple intensifications on 25 April 1998, when both spacecraft were located in the early morning sector (03–04 MLT) at a radial distance of 10–11 R_E. In association with the onset of a poleward expansion of the aurora and the westward electrojet in the premidnight and midnight sector, both satellites in the morning sector observed plasma sheet thinning and changes toward a more tail-like field configuration. During the subsequent poleward expansion in a wider local time sector (20−04 MLT), on the other hand, the magnetic field configuration at both satellites changed into a more dipolar configuration and both satellites encountered again the hot plasma sheet. High-speed plasma flows with velocities of up to 600 km/s and lasting 2–5 min were observed in the plasma sheet and near its boundary during this plasma sheet expansion. These high-speed flows included significant dawn-dusk flows and had a shear structure. They may have been produced by an induced electric field at the local dipolarization region and/or by an enhanced pressure gradient associated with the injection in the midnight plasma sheet.     

古冲沟冲积扇体地震反射资料研究

利用地震资料研究古冲沟冲积扇体的反射特征、内部结构、剖面特征和分布特征等问题,研究结果为识别和确认古冲沟冲积扇体油气藏提供依据     

南堡1号构造馆三段断盖配置油气渗漏部位及其控藏作用

为了研究南堡凹陷南堡1号馆三段火山岩盖层上下油气分布规律,在馆三段火山岩盖层及其内油气渗漏断裂发育及分布特征研究的基础上,通过对馆三段火山岩盖层断接厚度与其封油气所需最小断接厚度相对大小的比较和对油气渗漏断裂凸面脊的确定,预测了南堡1号构造馆三段断盖配置油气渗漏部位;并结合油气分布,对断盖配置油气渗漏部位对油气成藏与分布的控制作用进行了研究。结果表明,南堡1号构造馆三段断盖配置发育10处油气渗漏部位,其中：F₂及分支断裂油气渗漏部位最发育,有3处油气渗漏部位;其次是F₁、F₆断裂,有2处油气渗漏部位;F₃、F₄、F₅和F₇断裂仅各发育1处油气渗漏部位。这些油气渗漏部位及附近有利于下伏东一段油气在上覆馆三段之上聚集成藏,应是造成南堡1-1断鼻、南堡1-3断块和南堡1-5断鼻北部油区油气既可以分布在下伏东一段又可分布在馆三段之上,而南堡1-5断鼻南部油气仅分布在下伏东一段的根本原因。     

苏德尔特构造带贝14块兴安岭群层序地层分析

以层序地层学理论为指导,利用岩心、测井、地震资料相结合的分析手段,建立了苏德尔特构造带贝14块兴安岭群的层序地层等时格架,将兴安岭群划分为3个三级层序和短期中期基准面旋回。分析了个层序的主要构型及其成因,认为盆地由断陷向凹陷转化,沉积速率也随之降低,盆地各层序的厚度由厚变薄。兴安岭群内部层序界面多为沉积间断,不同沉积时期的岩性、物性以及沉积物叠置关系具有明显的韵律性变化。层序发育明显受构造活动的控制,幕式构造活动是构成层序主要构型的成因。     

The response of braided planform configuration to flow variations,bed reworking and vegetation: the case of the Tagliamento River,Italy

Morphological features of braided rivers (bars, channels and pools) experience major changes in area, shape and spatial distribution as a response to (i) the pulsation of discharge during a flood and (ii) the bed evolution induced by floods. In this work, at‐a‐station relationships between water level and planform configuration were investigated on the Tagliamento River, a large gravel‐bed braided river in northeast Italy, over a 2‐year study period comprising three bankfull events and several small‐to‐medium floods. The analysis was performed on two 1‐km‐long reaches, characterized by different riparian vegetation cover. Ground‐based images with an hourly temporal resolution were acquired using software‐controlled, digital cameras. Bars, channels, pools and vegetated patches were manually digitized on more than 100 rectified images. Sequences of constant‐level images spanning the study period were used to quantify the impact of floods on the stability of at‐a‐station relationships and on the turnover rate of water bodies. The analysis shows that wetted area increased almost linearly with water level in both reaches. The average number of branches per cross‐section peaked at intermediate flow levels, increasing from 2 at low flow up to 6–7. The number of branches displayed the largest fluctuations over time, with significant changes produced also by moderate floods. Turnover rates were high in both reaches, with more than 30% of wetted areas at low flow converting into bare gravel in less than 2 months. Vegetation colonization was found to limit the mobility of the low flow channels over time by concentrating the flow in fewer, deeper anabranches. The number of channels per cross‐section was 30–40% less in the vegetated reach and the proportion of low flow water bodies in the same position after 12 months increased from 3% to 14%. Copyright © 2012 John Wiley & Sons, Ltd.     

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地震应急快速触发响应系统的参数配置与用户分组管理

主要介绍了中国数字地震观测网络项目应急分项软件"地震应急快速触发响应系统"中的参数配置和用户分组管理2项重要的基础功能模块,详细阐述了这2项功能的具体实现方法和原理。     

中东地区鲁卜哈利盆地古生界地震反射构型特征与储层预测

根据中东地区鲁卜哈利盆地古生界不同沉积相储集砂体的地震反射构型不同,运用地震资料精细解释与地震沉积学、层序地层学相结合的方法,对盆地东部已钻井区辫状河道和三角洲前缘砂体的沉积特征与地震反射构型特征进行了识别分析;并由此类比到西部地区进行储层预测,在沉积环境相同的T构造区古生界志留系三级基准面旋回TS3下降期,识别出与东部反射特征相似的两套地震反射体,分别预测为辫状河道和三角洲前缘砂体;以此为依据提交的井位建议得到采纳,实钻后证实预测砂体存在。     

基于GIS的油田站控组态软件研究与实践

针对油田联合站的主要工艺流程、生产要求及自动化仪表的配置情况,在现有力控组态软件的基础上,探讨了一种利用GIS技术特点的组态图应用模式,结合组态软件采集的实时生产数据,结合GIS化的工艺流程,为油田各级领导提供宏观与微观的生产状态展示与分析,辅助生产决策。     

电法在秦岭钼多金属矿区找盲应用

本文以电法在秦岭某钼多金属矿区寻找深部盲矿的应用为例,介绍了电法勘查方法应用效果,说明物探资料在地球物理前提条件具备时,可以为矿区设计和开发生产过程提供重要的信息和依据,在相似地区深部找矿和寻找盲矿体具有一定借鉴意义。