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青海省贵德县(盆地)地热资源的开发利用 总被引:1,自引:0,他引:1
本文以贵德盆地地热地质条件为背景,结合贵德盆地多年的地热探采积累的资料,论述该盆地地热资源赋存特点,并对地热成井工艺和对地热的合理的开发利用提出了见解,对类似山间盆地地热资源的开发利用具有一定的借鉴意义。 相似文献
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河北省邯邢东部平原区(冀南凹陷)地热资源的利用与开发 总被引:1,自引:0,他引:1
邯邢东部平原区温增温率3℃/100m,被任为是不宜开采利用的“非地热异常区”。但近几年来在该区已成功施工了井深1500~1800m的探采结合地热井拾余口,井口出水温度达50℃以上,证实了邯邢东部平原区地热开发利用前景广阔。根据该区域地热条件背景及地热资源赋存特点,结合该区近几年地热探采施工体会,对地热井成井工艺和合理开发利用地热资源的提出了有益见解,对类似平原区地热资源的开发利用具有一定的启发和借鉴意义。 相似文献
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地热、浅层地温能(以下简称地热"两能")是一种新型的可再生能源,具有储量大、清洁、就地取材、可再生等优点,其开发利用对改善空气质量、落实绿色发展理念具有重要作用。京津冀地区是地热"两能"开发利用程度最高、应用规模最大的地区。特别是以北京经验为基础,促成了全国范围内浅层地温能勘查开发工作的大发展。如何使地热"两能"为京津冀协同发展的生态文明建设做出更大的贡献值得思考。本文在北京市地勘局多年浅层地温能研究与推广实践经验总结的基础上,提出应深入落实中央提出的的五大发展理念,开发与创新结合积极推进京津冀地区地热"两能"的高效利用。 相似文献
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为了探索苏北盆地赣榆—和安湖地区地热地质条件,在了解该区地质、物探条件的基础上,采用地热地质调查、可控源音频大地电磁法(CSAMT)、氡气测量、地温测量方法进行探测,对研究区2500 m左右深度内断裂位置和展布特征进行地质物探综合解析研究。研究成果表明:调查区地热资源的分布与断裂构造关系密切,并具备形成地热的“热源、流体源、通道、热储、盖层”等基本热储水文地质条件,具有良好的勘查前景,区内北北西向断裂为地热资源勘查有利部位。本研究为苏北地区地热成因与地质结构增添了新的地质及地球物理依据,对合理开发利用地热资源具有重要指导意义。 相似文献
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为了探索苏北盆地赣榆—和安湖地区地热地质条件,在了解该区地质、物探条件的基础上,采用地热地质调查、可控源音频大地电磁法(CSAMT)、氡气测量、地温测量方法进行探测,对研究区2500 m左右深度内断裂位置和展布特征进行地质物探综合解析研究。研究成果表明:调查区地热资源的分布与断裂构造关系密切,并具备形成地热的“热源、流体源、通道、热储、盖层”等基本热储水文地质条件,具有良好的勘查前景,区内北北西向断裂为地热资源勘查有利部位。本研究为苏北地区地热成因与地质结构增添了新的地质及地球物理依据,对合理开发利用地热资源具有重要指导意义。 相似文献
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考虑核电厂地基-基础的动力相互作用,应用显式动力有限差分法分析了地震作用下极软岩、较软岩、坚硬岩上核电厂建筑结构基础的地震响应特征,比较了岩石坚硬程度对基础加速度反应谱的影响。研究表明:随着岩石坚硬程度的提高,核电厂建筑物结构基础的地震响应有增加的趋势;在周期轴上,基础处的加速度反应谱曲线会随着岩石坚硬程度的提高逐渐向短周期(高频段)方向移动。在高频段,建造于较坚硬岩石上基础结构的加速度反应谱值偏大;在中等频段,建造于较软岩石上基础结构的加速度反应谱值偏大;在低频段,岩石坚硬程度对加速度反应谱的影响不显著。 相似文献
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Ivan V. BRAGIN Georgy A. CHELNOKOV Oleg V. CHUDAEV Natalia A. KHARITONOVA Sergey V. VYSOTSKIY 《《地质学报》英文版》2016,90(1):276-284
Studied waters belong to warm(T=30-50℃),alkaline(pH=8.9-9.3),low mineralized(TDS235 mg/1)Na-HCO_3 or Na-SO_4-HCO_3 thermal waters with high content of SiO_2(up to 81 mg/l)and F(up to 3.9 mg/1),occur on modern volcano-tectonic rejuvenated areas of Eastern Sikhote-Alin orogenic belt.Low~3He concentration as well as N_2/O_2 and N_2/Ar ratios exclude influence of deep mantle fluid.New rare earth element data constrain our understandmg of water-rock interaction occurring in the water source region.Meteoric origin of waters is proved by stable isotope values varying from-71‰to-136.1‰and from-10.8‰to-18.8‰forδ~2U andδ~(18)O respectively.REE patterns reflect high pH,resultfing from water-rock interaction and oxidative conditions.Calculations of deep aquifer temperature using Na-K and quartz geothermometers show 116.8-131.1°C and 82.2-125.8℃respectively.Presence of deep faults both with abnormal thermal gradient(~45-50 K/km)define unique geochemical shape of thermal waters of Sikhote-Alin,area,where no present volcanic activity is registered. 相似文献
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M. D. Sharma 《Journal of Earth System Science》2004,113(2):247-257
Three dimensional scattering of near-field is studied for dilatation and rotation in the time domain. The perturbation method
is applied to solve the equation of motion for the first order scattering from a weak inhomogeneity in an otherwise homogeneous
medium. The inhomogeneity is assumed close enough to the point source so that the near-field intermediate wave is dominating
over the far-field sphericalP andS pulses. The integral expressions are derived to relate dilatation and rotation of scattering to the radial fluctuations of
velocities and density in the inhomogeneity. These integrals are solved to calculate the strains of scattering from (a part
of) an inhomogeneous spherical shell of arbitrary curvature. Variable curvature may allow the shape of inhomogeneity volume
element to change uniformly from spherical to rectangular. Rotation of scattering from a spherical shell is independent ofP wave velocity inhomogeneity. Dilatation of scattering does not involveS wave velocity inhomogeneity but its gradient. The back scattering results are obtained as a special case. Strains are computed
numerically, for hypothetical models to study the effects of various parameters viz., velocity inhomogeneity, distance of
source from inhomogeneity and from receiver, and thickness of inhomogeneity. The curvature of the spherical shell is varied
to study the effects of the shape of inhomogeneous volume element on scattering. 相似文献
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地震次生地质灾害风险评估集对态势分析 总被引:2,自引:0,他引:2
5.12四川汶川8级强震引发了大量次生地质灾害,加剧了灾情并严重影响抗震救灾。地震次生地质灾害受多重因素制约,其孕育与致灾过程具有不确定性。利用集对分析原理与方法,对地震次生地质灾害进行同异反态势分析,拟定了风险评估的集对分析同一度、差异度、对立度等指标体系的构建原则与赋值标准,对承灾体系统的不确定性及其作用作了刻画与分析,建立了不同风险分区代表性的集对分析联系度表达式,为地震灾害研究提供了可资借鉴的新思路和技术方法。 相似文献
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下扬子区三叠纪古地理演化 总被引:2,自引:2,他引:0
下扬子区在三叠纪期间接受了早-中三叠世海相碳酸盐沉积、中-晚三叠世海陆交互相和陆相湖沼沉积.沉积相带的空间分布和古地理格局的变迁明显地受到区域构造的控制.区内盆地发育与演化是在华南板块与扬子板块、扬子板块与华北板块相互作用的背景下进行的.早-中三叠世末期的印支运动是下扬子区构造-古地理格局改变的决定性因素,使下扬子海盆闭合,沉积类型由海相沉积变为陆相沉积.下扬子区三叠纪古地理的演化特征也为板块碰撞提供了沉积证据. 相似文献
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Isothermal thermogravimetric experiments have been carried out to determine the reaction kinetics of the dehydration processes
in fuller's earth, a natural Ca-montmorillonite. Dehydration in swelling clays is a complex reaction, and analysis of the
thermogravimetric data using empirical rate equations and time-transformation analysis reveals that the nature of the rate
controlling mechanism is dependent upon both the temperature regime of the sample as well as the extent of reaction. For fuller's
earth, we find that the dehydration kinetics are dominated by a nucleation and growth mechanism at low temperatures and fractions
transformed (stage I), but above 90 °C the last stages of the reaction are diffusion controlled (stage II). The activation
energy for dehydration during stage I is around 35 kJ · mol−1, whereas the removal of water during stage II requires an activation energy of around 50 kJ · mol−1. These two stages of dehydration are associated with primary collapse of the interlayer (stage I) and movement of water that
is hydrated to cations within the interlayer (stage II).
Received: 28 August 1998 / Revised, accepted: 27 January 1999 相似文献