深井水氡主要干扰因素及映震效能分析

对甘肃省玉门青6井和平凉泾川泾3井两口深水井的水氡及辅助项目观测资料采用多元逐步回归、相关距平、一阶差分等方法进行处理，分析并排除了主要干扰因素，显示出两井在肃南5.4级、托莱6.0级和礼县5.1级地震前有明显异常，对两井的映震效能和地震预报前景进行了评价。     

流动成像测井研究进展

流动成像测井属于对非均匀介质动态的非线性测量，通过对油气井内多相流体信息的投影扫描和反演处理，实时成像显示流体分布及流动状况，国外研制的电导法，电容法仪器采用电导探针或电容元件构成阵列测量探头，分别利用油气与水的导电特性和介电特性差异辨识井内流体，对流动截面的测量局限于个别点上，已在水平井中见到应用效果，但对物场信息投影测量的数据量和分辨率未能满足成像要求。我国提出的电磁法采用环状阵列电极构成测量探头，综合利用油气与水的导电和介电特性差异辨识井内流体，可以测量获得多相流体流动截面的清晰图像，为研究开发全新的流动成像测井系统奠定了良好基础。     

A discussion on the records of water level ‘precursors’ in Well Shuozhou, Shanxi Province

A lot of slow fluctuations of water level have been observed in the original recording maps of subsurface fluid in Well Shuozhou, Shanxi Province. Some typical recording maps of the “precursors” are introduced in the paper and the features of the “precursors” recorded by the well are analyzed. The results show that 38% strong earthquakes possess this kind of record, which has a fluctuation period arranging from several to tens of minutes and appear mostly two days before the earthquakes. Moreover, the mechanism, transmission and responding conditions of well water level are discussed, as well as the scientific meaning and practical value of the “precursor” of the well water level in earthquake predictions. Foundation item: State Natural Science Foundation of China (19973011).     

大姚地热动态特征分析

通过大姚高精度水温观测井水地质、井孔条件的分析，震例观测资料、实验观测数据的处理，以及井水水质分析结果，表明大姚水温周期性变化的突出位置是井深75m左右，根本原因是该地层石膏脉稳定释热，含水层热水与井内冷水混合过程中，在通道内形成钙盐类沉淀物（如CaSO4CaCO3），堵塞对流通道，含水层内外压差突破被阻塞通道，热水反复侵入井内，便形成水温周期性变化。地震的孕育、发生和调整过程，由于应力场作用，产生附加地热场，水温基值发生变化，周期畸变或消失，这种附加地热动态是可以恢复的。所以认为大姚地热动态是井区特殊地层地热信息的反映。     

汾河口傍河水源地激发补给量研究

该文阐述傍河水源地地下水资源构成和补给特性。利用野外试验与室内数值模拟相结合方法，分析汾河口傍河水源地可采水资源量，数值模型刻画黄河实际摆动边界，考虑潜水延迟给水和极端干旱气候条件等多种方案；利用环境同位素技术追踪傍河水源地开采条件下的河水激发补给过程和补给强度。研究表明，在渗透性较好的常年性河流旁建立的水源地，具有抵御极端气象、水文环境以丰补歉的能力，枯水年动用的含水层储存量。丰水年恢复性强。     

大港油田板深22井油气地球化学异常特征

根据板深22井中不同地球化学指标的背景含量和异常特征，重点探索和总结了不同油气层的化探指纹指标，并根据地表指纹指标的异常组合、配套关系及异常特征，对油气层的埋深进行了初步预测，为今后该地区地表开展预测油气藏埋深的工作提供了一定的地球化学依据。     

罕见矿物--六方球方解石的发现及特征

大庆油田部分三元复合驱抽油井结垢现象比较严重。井中结垢损害抽油设备，增加了生产成本。通过运用XRD，IR，SEM和化学分析手段对抽油井垢的研究发现，垢的主要化学成分为CaO和SiO2，其含量分别为67％和28％，油井垢中的主要矿物成分是罕见矿物——六方球方解石。六方球方解石呈微晶状(1—10μm)，并常常以微晶聚集的球粒状出现，同时伴生有无定形SiO2。呈游离态的SiO2和有机质对于六方球方解石的形成起到了重要作用。     

Introduction of structural aseismic research in China in recent four years

Introduction Greeting the coming of the 21st century, Professor HU Yu-xian and other Chinese scholars briefed the trend of earthquake engineering in China and aboard (HU, 1999; HU, ZHOU, 1999). The experiences and lessons learning from the destructive earthquakes in China and abroad in re-cent years, the damage action of the large velocity impulse in ground motion in near field in seis-mic design, numerous earthquake examples show that there are many weaknesses in aspects of earthquake p…     

石泉ML4．7级地震前天水深井水温的短临异常特征

分析了天水台数字深井水温资料在陕西石泉ML4．7级地震前的异常特征，发现在震前5天内深井水温发生大幅度的降升变化，呈负脉冲形态，表现为典型的脉冲型前兆异常形态特征。     

Scattering of elastic waves by a general anisotropic basin. Part 2: a 3D model

Scattering of plane harmonic waves by a three‐dimensional basin of arbitrary shape embedded within elastic half‐space is investigated by using an indirect boundary integral equation approach. The materials of the basin and the half‐space are assumed to be the most general anisotropic, homogeneous, linearly elastic solids without any material symmetry (i.e. triclinic). The unknown scattered waves are expressed in terms of three‐dimensional triclinic time harmonic full‐space Green's functions. The results have been tested by comparing the surface response of semi spherical isotropic and transversely isotropic basins for which the numerical solutions are available. Surface displacements are presented for a semicircular basin subjected to a vertical incident plane harmonic pseudo‐P‐, SV‐, or SH‐wave. These results are compared with the motion obtained for the corresponding equivalent isotropic models. The results show that presence of the basin may cause significant amplification of ground motion when compared to the free‐field displacements. The peak amplitude of the predominant component of surface motion is smaller for the anisotropic basin than for the corresponding isotropic one. Anisotropic response may be asymmetric even for symmetric geometry and incidence. Anisotropic surface displacement generally includes all three components of motion which may not be the case for the isotropic results. Furthermore, anisotropic response strongly depends upon the nature of the incident wave, degree of material anisotropy and the azimuthal orientation of the observation station. These results clearly demonstrate the importance of anisotropy in amplification of surface ground motion. Copyright © 2003 John Wiley & Sons, Ltd.