利用斯通利波衰减反演渗透率的方法改进     

崔志文  吕伟国  谢树理  曹正良  王克协 《吉林大学学报(地球科学版)》2010,(Z1)

利用严格的Biot介质模型,针对阵列声波测井情况,建立了基于物理统计方法的利用斯通利波幅度衰减反演储层渗透率之线性化最小二乘反演模型。作为对方法可行性的检验,运用该方法对理论合成数据进行了处理,结果表明运用统计方法后反演渗透率的偏差变小,证明了方法的可行性。  相似文献   

河南省煤系地层地震反射波发育特征     

陈双华  董守华  张丽华 《吉林大学学报(地球科学版)》2010,(Z1)

对河南省不同区域的煤系地层反射波发育特点进行分析研究、归类总结和正反演对比,建立了地震波-地质层位的对应关系,有利于解释人员从时间剖面上准确分辨出新生界、煤系地层和煤系基底反射波组,确定煤层反射波及煤层赋存状况,为类似地区的地震资料解释工作提供科学的指导。  相似文献   

网络存储技术在石油地震数据处理中的应用     

文领章  刘财  魏旭光 《吉林大学学报(地球科学版)》2010,(Z1)

针对油田局域网的特点,利用网络存储技术中的SOCKET编程方法,结合Linux或Unix系统中的常驻进程及输入输出控制技术解决海量地震数据交换的问题,这个方法可以实现远程磁带或磁盘数据的读取。对常用的地震数据SEGY格式及其存储特点进行分析,在SEG-Y格式的地震数据的读写技术中,采用位运算的方式解决移位及浮点数的读写操作。网络存储技术的应用实现了远程海量地震数据的存取,位运算方法提高了地震数据输入输出的速度。  相似文献   

航空重力数据常用滤波方法对比研究     

袁园 《吉林大学学报(地球科学版)》2010,(Z1)

航空重力测量中,存在着各种各样的噪声干扰,严重影响了异常的精度和分辨率。低通滤波器在航空重力测量数据处理中对于去掉高频噪声干扰有着重要的作用;因此,对航空测量信号进行异常恢复和噪声信号衰减的一个重要步骤就是设计低通性能更优越的滤波器。通过模型实验,对比6×20_s RC滤波器、Kalman滤波器和FFT滤波器输出结果,以确定各种滤波器的可靠性,并分析了3种滤波器的影响因素,为以后对数字滤波器的研究奠定基础。  相似文献   

利用功率谱直接求埋深的影响因素     

戴伟铭 《吉林大学学报(地球科学版)》2010,(Z1)

功率谱方法在磁数据处理方面的应用比较广泛。采用近似公式直接求出地质体的上下底埋深。在此近似方法中,会出现一些影响结果的因素。主要对地质体的水平尺寸和厚度的影响做了一些研究,并得出相应的结论。  相似文献   

海底扩张的潮汐模式   总被引：3，自引：0，他引：3  

杨学祥 《大地测量与地球动力学》2003,23(2):77-80

2000年6月底，东京以南的伊豆岛开始发生火山与地震活动。此后，在伊豆岛观测到异常的地壳变形，8月底，火山与地震活动达到高潮。对潮汐与火山和地震活动的关系进行了分析，认为：地壳变形是由伊豆岛的岩脉侵入引起的，并且与强潮汐天文条件相对应。根据观测和计算数据提出了海底扩张的潮汐模式。  相似文献   

A geochemical survey of thermal springs in western part ofRepublic of Yemen and their geothermometric characteristics     

HazaeaMohammed HUKe 《东北亚地学研究》2004,7(1):58-63

The high-mineral contents of some thermal waters are believed to have medicinal properties. Numerous spas and bathhouses might be built at these hot springs to take advantage of theses supposed healing properties such as skin diseases, rheumatism and so on. This paper is to find thermal reservoir and to classify the kinds of water. The majority of thermal springs are found discharging from igneous centers of Tertiary and Quaternary volcanic fields of the western Yemen (research area). Structurally these volcanisms are connected to N-NW faults that are parallel to the main Red Sea trend. Temperature and pH values of the thermal spring range 37℃-96℃, and 6.3-8.7 respectively. The Yemen/thermal waters indicate high variability in composition since they are ofNa (K) -CI, Na=HCO3 and Ca (Mg) =SO4 types, whereas the surficial waters have the typical worldwide Ca (Mg) -HCO3 composition. Different liquid phase geothermometers,such as SiO2, K^2/Mg and Na/K. Estimated reservoir temperatures ranging 70℃-140℃ perform equilibrium temperature evaluation of the thermal reservoirs.  相似文献   

Attribution of Persistent Precipitation in the Yangtze–Huaihe River Basin during February 2019     

Zhixuan WANG  Jilin SUN  Jiancheng WU  Fangyue NING  Weiqi CHEN 《大气科学进展》2020,37(12):1389-1404

In February 2019, a month-long persistent precipitation event occurred in the Yangtze–Huaihe River basin. The geopotential height field that affected the duration of this frontal rainfall was divided into a high-latitude part and a low-latitude part for analysis. In the high-latitude part, a two-wave structure led to quasi-stationary circulation, and the change of both the blocking high pressure and Arctic Oscillation phase caused cold air to invade South China continuously and changed the frontal position. In mid-to-low latitudes, the persistent precipitation showed quasi-biweekly oscillation characteristics. The so-called “subtropical high–precipitation–anticyclone” (SHPA) feedback mechanism blocked the circulation systems in the mid-to-low latitudes and provided a continuous supply of water vapor for precipitation. As for the effect of sea surface temperature, the western North Pacific anomalous anticyclone stimulated by El Ni?o strengthened the intensity of the southerly wind and provided support for the redevelopment of the anticyclone system in the SHPA feedback mechanism. The sea surface temperature anomaly in the South China Sea provided sensible heating for precipitation, and convergent rising airflow was conducive to the occurrence of precipitation. Additionally, the SHPA mechanism provides a reliable basis for the prediction of persistent precipitation in winter in the mid-to-low latitudes.  相似文献   

北美洲冬季冷空气对南美洲夏季降水异常影响的研究          下载免费PDF全文

梁嘉俊  孙即霖   《山东气象》2020,40(2):62-70

利用1981—2017年NCEP/NCAR再分析资料和ECMWF再分析资料,研究了北美洲冬季高纬度冷空气对南美洲夏季降水异常的影响。结果表明,北美洲冬季高纬度冷空气通过影响向南越赤道气流的强弱,影响南美洲热带辐合带（intertropical convergence zone, ITCZ）位置和强度的变化,进一步引起南美洲天气的变化。北美洲冬季冷空气的南下过程能够引起80°～70°W的向南越赤道气流明显加强,导致2011年南美洲热带辐合带的位置异常偏南,强度异常偏强,是造成降水异常偏多的重要成因。通过相关分析发现北美洲冬季冷空气对南美洲ITCZ位置的影响更明显。  相似文献   

Research on method of pressure grouting piling of driven tube     

Dianqi PAN Zupei ZHANG Diancai PAN Yong CHEN Maosen TAN 《东北亚地学研究》2006,9(2):194-196

The pressure grouting pile of driven tube can improve the load bearing capacity of the single pile from the mechanism of pressure grouting pile of driven tube.On the basis of analyzing the mechanism,the authors designed the machines and tools of pressure grouting,determined the operating manufacture and technology parameter on the pressure grouting secondly.The result shows that the pressure grouting pile of driven tube not only changes the pile type but also reduce the length of the pile and its engineering cost,it enhances the load bearing capacity of single pile an the same time.  相似文献