长白山火山活动发展阶段及火山灾害评价

长白山地区火山活动划分二个发展阶段：以点一线形式喷发形成的广阔玄武岩台地阶段一焊缝构造发展阶段;中心式大规模喷发形成的锥状火山机构一焊点构造发展阶段,长白山地区乃至吉林东部地区中一新生代以来抬升平均速率81m／Ma及白头山一泉阳一露水河一带中生代以来存在一个火山坳陷盆地。     

Lithofacies paleogeography mapping and reservoir prediction in tight sandstone strata: A case study from central Sichuan Basin,China

Sand-rich tight sandstone reservoirs are potential areas for oil and gas exploration. However, the high ratio of sandstone thickness to that of the strata in the formation poses many challenges and uncertainties to traditional lithofacies paleogeography mapping. Therefore, the prediction of reservoir sweet spots has remained problematic in the field of petroleum exploration. This study provides new insight into resolving this problem, based on the analyses of depositional characteristics of a typical modern sand-rich formation in a shallow braided river delta of the central Sichuan Basin, China. The varieties of sand-rich strata in the braided river delta environment include primary braided channels, secondary distributary channels and the distribution of sediments is controlled by the successive superposed strata deposited in paleogeomorphic valleys. The primary distributary channels have stronger hydrodynamic forces with higher proportions of coarse sand deposits than the secondary distributary channels. Therefore, lithofacies paleogeography mapping is controlled by the geomorphology, valley locations, and the migration of channels. We reconstructed the paleogeomorphology and valley systems that existed prior to the deposition of the Xujiahe Formation. Following this, rock-electro identification model for coarse skeletal sand bodies was constructed based on coring data. The results suggest that skeletal sand bodies in primary distributary channels occur mainly in the valleys and low-lying areas, whereas secondary distributary channels and fine deposits generally occur in the highland areas. The thickness distribution of skeletal sand bodies and lithofacies paleogeography map indicate a positive correlation in primary distributary channels and reservoir thickness. A significant correlation exists between different sedimentary facies and petrophysical properties. In addition, the degree of reservoir development in different sedimentary facies indicates that the mapping method reliably predicts the distribution of sweet spots. The application and understanding of the mapping method provide a reference for exploring tight sandstone reservoirs on a regional basis.     

浅析现浇板裂缝产生原因及治理方法

近年来,随着现浇结构使用越来越广泛,但建设物现浇板板角出现裂缝的现象越来越多,笔者就板角裂缝的形成原因,进行了简要分析,并提出了其预防措施.     

Mathematical modelling of volcanic tsunamis

The height of widespread tsunami runup about the Bay of Plenty from various volcanic scenarios involving eruptions at White Island is shown to be insignificant in all cases considered, except for Krakatoa‐type explosions. The problem of localised inundation remains unanswered. Some definitions describing volcanic tsunami risk, introduced recently by J. Latter (Bulletin volcanologique 1982), are briefly mentioned. All numerical calculations assumed cylindrical symmetry and used a flux‐corrected Lax‐Wendroff algorithm to solve the modified shallow water equations of Peregrine.     

刺参(Apostichopus japonicus)腐皮综合症发生相关蛋白的分离与鉴定

采用比较蛋白质组学的方法,对2011年10月20日取自辽宁省普兰店室内养殖厂腐皮综合症刺参和健康个体肠组织中差异表达蛋白进行了研究。结果表明,在优化的电泳条件(80μg脱盐蛋白、pH4—7[NL,13cm]的IPG预制胶条)下,共检测到约700个蛋白质点;表达量差异两倍以上的蛋白点51个,最大表达差异比率为4.32;对其中重复性一致的30个差异点进行质谱鉴定,成功鉴定了23个差异蛋白,包括铁蛋白,过氧化氢酶,泛素相关修饰子3,细胞色素氧化酶和肌动蛋白等;进一步扫描实验室完成的刺参转录组数据,筛选了过氧化氢酶和泛素相关修饰子3的EST序列。本研究是蛋白层面上刺参腐皮综合症发生机制的有效尝试,研究结果为进一步认识该疾病的发生机制提供了参考。     

位场解析信号振幅极值位置空间变化规律研究

通过对单一边界、双边界、多边界以及点(线)质量模型重力异常解析信号振幅和重力异常垂向导数解析信号振幅的极值位置空间变化规律研究表明,重力异常垂向导数解析信号振幅和化极磁力异常解析信号振幅的极值位置相同,且与重力异常解析信号振幅的极值位置空间变化规律相似.利用位场解析信号振幅极大值位置能够准确识别单一直立边界地质体的边缘位置,但不能准确识别其它任何形体的边缘位置,其识别结果的偏移量大小随地质体的埋深、水平尺寸以及倾斜程度等变化.虽然重力异常垂向导数解析信号振幅比重力异常解析信号振幅的峰值更加尖锐、横向识别能力更强,其极大值位置更靠近地质体上顶面边缘位置,但均受地质体埋深的影响较大;随着埋深的增加,位场解析信号振幅的极大值位置会快速收敛到形体的"中心位置",其轨迹类似"叉子状";且对多边界模型会出现"极大值位置盲区"而无法识别其边缘位置.通过这些理论研究表明,位场解析信号振幅只能识别单一边界地质体的边缘位置;而不宜用来识别多边界地质体的边缘位置,但可以用来识别多边界地质体的"中心位置".     

免疫细胞化学法测定鱼类淋巴囊肿病毒(LCDV)滴度

利用免疫细胞化学法测定鱼类淋巴囊肿病毒(LCDV)滴度.以牙鲆鳃细胞系(FG)作为感染细胞,将生长旺盛的FG细胞接种于48孔培养板中培养至形成细胞单层,用2倍连续稀释的LCDV粗提液分别接种FG细胞.固定各稀释度LCDV感染后的FG细胞,孵育抗牙鲆LCDV单克隆抗体,其后再运用生物素-亲合素反应系统,以碱性磷酸酶底物APRed试剂盒发色.倒置显微镜观察,被病毒感染的FG细胞的细胞质呈现红色,未被感染细胞的细胞质呈无色.记录各稀释度病毒感染的阳性细胞孔数,按Reed-Muench法计算组织细胞培养半数感染量(TCID0).结果显示,免疫细胞化学法测得LCDV在FG的滴度为1.77×210 TCID50/mL.该法可以用来有效测定LCDV滴度,且结果直观、准确性较好,灵敏度较高.     

低渗透油藏菱形反九点井网不等缝长优化研究

在低渗透油藏开发中广泛使用菱形反九点井网,但针对不同位置生产井及注水井的裂缝缝长配比关系还缺少广泛深入的研究。基于长庆油田某低渗透油藏参数,建立了数值模拟模型,在菱形反九点井网中分别设置不同的边井、角井和注水井裂缝穿透比,研究不同裂缝配置模式对水驱开发效果的影响。流线模拟及数值模拟计算结果表明,在注水开发中,注水井缝长是影响油田产液量及水驱效果的关键因素;边井裂缝较角井裂缝更易见水,对油田综合含水影响较大,在菱形反九点井网中需要进行不等缝长优化设计;边井裂缝缝长对水驱效果的影响分为早、中、晚期(Ⅰ、Ⅱ、Ⅲ)曲线段,随着注水井裂缝穿透比增加,早期(Ⅰ)曲线段增长,中期(Ⅱ)曲线段缩短,而晚期(Ⅲ)曲线段变化较小;随着角井裂缝穿透比增加,采出程度逐渐增大,当角井裂缝穿透比较大时,存在“反转”现象;随着注水井裂缝穿透比增加,角井裂缝优化穿透比减小,而边井裂缝优化穿透比增加。该研究成果对于指导低渗透油藏菱形反九点井网裂缝优化设计,提高波及系数和开发效果具有重要的指导意义。     

Study of “bright spots” in seismic reflection data

"bright spot" on reflection seismic profile has been regarded as one of the important indications of oil and gas, and it has been widely used in the oil and gas exploration.Moreover, with the development of new technologies, "bright spot" technique has been gradually applied to the exploration of coal, underground water and other fields, and also in the research of deep structure of the earth.Based on the reviewing of published literatures, the authors described the structural features and generation of "bright spot" on seismic profile for energy resources exploration and crustal-scale deep seismic reflection profiles, and further summarized the applications of the "bright spot" technique in energy resource exploration and deep structure research.     

滇越铁路车站等级设置与周边城镇化关系的探讨

滇越铁路是云南也是西南地区最早修建的一条铁路,沿线车站共设5等:特等、一等、二等、三等、小站,按各县/市内最高等级车站将研究区相应划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ5个区。滇越铁路不同等级车站设置对周边城镇化进程的影响不尽相同,特等站产生显著影响,Ⅰ区人口增长尤为突出(高达214.5%),远高于其他4个区(均低于100%);一等、二等、三等站因有关区域各具特色影响程度较为相当,Ⅱ、Ⅲ、Ⅳ区内人口增长速度相似(69.1%、76.6%、73.2%);小站影响较小,Ⅴ区内人口在通车时最多但增长极为缓慢(仅27%)。就人口密度与车站等级设置的关系来说,与特等站有一定关系,与其他等级车站则关系不大,这是因为人口密度与城镇自身发展历史更为密切。