油气层综合解释系统

综合录井各项录井水平的提高为综合解释油气层提供了前提条件。该文通过对地质、气测和地化录井等30多项参数与储层物性关系的分析研究,分别得出了三种录井方法对地层流体性质的判别标准,从而形成了较系统的油气层综合解释系统,进而可实现现场油气层的自动、快速、有效识别。其解释结果与试油结论相比,总体解释符合率已达到85.7%。     

Case History of Damage to a School Building Caused by Differentially Heaving Bedrock

This case study considers the question of whether settlement or heave is the principal cause of damage to a school building near Denver. The building, which was underlain by engineered fill in the center and shallow claystone bedrock beneath the outer wings, experienced progressive deformation and significant damage during a 15-year period. With several millions of dollars of rebuilding costs at risk, the most likely cause of failure needed to be ascertained to arrive at an optimum mitigation solution. The investigation described herein considers the regional geology and its known effect on various types of engineered structures in terms of characteristic damage patterns. The focus progressively narrows to concentrate on the geology and damage patterns of the local area and the site. The findings indicate that the major cause of damage to the building is associated with differential heaving of steeply dipping, expansive bedrock layers. This conclusion was adopted as a basis for subsequent remedial planning and design.     

关于矿区挡土建筑若干问题的商榷

本文总结矿山建设中挡土建筑设计应当注意的问题并进行讨论     

Stream Multiaquifer Well Interactions

In this paper, unsteady flow into a multiaquifer well due to stream stage changes and varying pumping rate is analyzed. The well is located at such a distance that the radius of influence touches the stream boundary; hence, pumping induces seepage from the stream to the aquifer. The discrete kernel approach, which is based on Duhamel’s principle, has been applied to find the interaction among stream, aquifers, and pumping well for constant as well as varying stream stage. The analytical expression for a damped sinusoidal flood wave passing in a fully penetrating stream has been used for obtaining the aquifer response. By applying image-well theory, the finite aquifer and well system has been transformed into an infinite aquifer and well system. The principle of superposition, which is applicable to a linear system, has been used to analyze the interaction processes among the three components of the system. The interaction of the stream, aquifers, and well with each other are analyzed during pumping, after stoppage of pumping, as well as during passage of a flood wave in the stream.     

秭归水田坝等三条断裂关系及孕震强度评价

鄂西种秭归盆地是长江三峡地区重要的构造单元之一，盆地东侧水田坝断裂与其南部龙王冲断裂、北部新华断裂，经分析不属同一基底构造体系。尽管各断裂近期活动不甚明显，按活动断裂评价标准，均不属工程活动断裂，但不能排除发生中强地震的危险性。用经验公式法估算的最大构造地辱震级，水田坝断裂为５．５级、龙王冲断裂为６．０级、新会断裂为６．５级。     

银山矿地质工作回顾和展望

本文总结了银山矿建矿四十年来积极开展矿山地质工作在矿床开采范围内进行找矿勘探、指导、服务生产等方面取得的可喜成绩和工作经验、提出了市场经济条件下矿山地质工作继续发挥重要作用的努力方向.     

百色水利枢纽地下厂房系统存在的主要地质问题及处理措施

百色水利枢纽地下厂房系统地质条件复杂,存在诸多不利因素,针对百色水利枢纽地下厂房系统存在的主要地质问题,介绍在设计、施工中所采取的处理措施。     

Validation of 2015 Lake Erie MODIS image spectral decomposition using visible derivative spectroscopy and field campaign data

Timely identification of color-producing agents (CPAs) in Lake Erie is a challenging, but vital aspect of monitoring harmful algal blooms (HABs). In particular, HABs that include large amounts of cyanobacteria (CyanoHABs) can be toxic to humans, posing a threat to drinking water, in addition to recreational and economic use of Lake Erie. The optical signal of Lake Erie is complex (Becker et al., 2009; Moore et al., 2017), typically comprised of phytoplankton, cyanobacteria, colored dissolved organic matter (CDOM), detritus, and terrigenous inorganic particles, varying in composition both spatially and temporally. The Kent State University (KSU) spectral decomposition method effectively partitions CPAs using a varimax-rotated, principal component analysis (VPCA) of visible reflectance spectra measured using lab, field or satellite instruments (Ali et al., 2013; Ortiz et al., 2017, 2013). We analyze 2015 imagery acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor and field samples collected during the early 2015 cyanoHAB season. We identified four primary CPA spectral signatures, and the spatial distribution of each identified CPA, in the reflectance spectra datasets of both the MODIS and lab-measured water samples. The KSU spectral decomposition method results in mixtures of specific pigments, pigment degradation products, and minerals that describe the optically complex water. We found very good agreement between the KSU VPCA spectral decomposition results and in situ measurements, indicating that this method may be a powerful tool for rapid CyanoHAB monitoring and assessment in large lakes using instruments that provide moderate resolution imagery (0.3 to 1 km²).     

复杂地表与地质地震资料处理技术研究与应用综述

复杂地区典型特征往往表现为近地表地质结构复杂,纵向、横向变化大,地下地质构造破碎,大倾角老地层出露。介绍了该类地区地震资料的主要特点;分析了处理好该类地震资料起决定性作用的静校正、去噪技术、频率补偿及偏移成像几个重要环节,并指出了生产中应注意的几个问题。     

防雷设计应首先认真调查地质、气象等条件

总结了建筑物易遭雷击的14种情况,以一个发生雷击事故的工程为例,提出在进行防雷设计时,首先要对建筑物所处的环境、地理、地质、气象条件和雷电活动规律进行认真调查,凡符合这14种情况之一的,至少应按第三类防雷建筑设防。