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Development of a new high-temperature hydrothermal gas apparatus for studying deformation, fluid-flow and grain-boundary diffusion

开发用于研究变形、流体流动和晶界扩散的新型高温热液气体装置

基本信息

批准号：
09354006
负责人：
SHIMAMOTO Toshihiko
金额：
$ 14.98万
依托单位：
Kyoto University (1998-1999)The University of Tokyo (1997)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Deformation of rocks, and fluid flow and material transport via pore fluid in rocks at temperatures and pressures are significant in many problems such as understanding the mechanisms of earthquakes and their prediction, fluid circulation in the Earth, and Earth's environmental problems that are important both scientifically and socially. High-quality deformation and fluid-flow gas apparatus is needed for such studies, but gas apparatuses have not been developed in Japan. Thus the main task of the present research has been to design and make a conventional gas apparatus for studying deformation and fluid flow at temperatures to 1,000 degrees Centigrade and at pressures to 200 Mpa. Also, it has been important to establish an industrial foundation for producing and refining gas apparatuses domestically in the future. Although the maximum pressure was limited to 220 Mpa because of the government regulation on high-pressure gas, a high-temperature and high-pressure gas apparatus was develo … More ped successfully in the three-year period of this research. This apparatus cannot produce as high confining pressure (about 500 Mpa) as gas apparatuses used in other countries, but it is equipped with better servo-controlled actuators for the axial load and pore pressure than foreign apparatuses. Thus, the present apparatus is capable of measuring a very wide range of permeability using various methods such as the pore-pressure oscillation method and the pulse-decay technique. The apparatus will open ways for studying material properties under highly corrosive environments like supercritical water and has many industrial applications.The apparatus has been used to study permeability structures of fault zones of Nojima fault, Median Tectonic Line, Yanagase fault, a nappe-boundary fault in Chugoku district, and Kan-nawa fault at effective pressures to 180 Mpa and at room temperatures, using NィイD22ィエD2 gas as the pore fluid. The results have revealed large effects of effective-pressure cycling and quite variable permeability structures depending on the tectonic setting and the type of country rocks of faults. The work will be extended to fault constitutive properties and to more permeability measurements at temperatures and pressures. Less

岩石的变形，以及在温度和压力下通过岩石中的孔隙流体的流体流动和物质输运在许多问题中具有重要意义，例如理解地震的机制及其预测，地球中的流体循环以及地球环境问题，这些问题在科学和社会上都是重要的。这种研究需要高质量的变形和流体流动的气体装置，但在日本还没有开发出气体装置。因此，本研究的主要任务是设计和制造一个常规的气体装置，用于研究温度至1,000摄氏度和压力至200 Mpa的变形和流体流动。此外，重要的是建立将来在国内生产和精炼气体设备的工业基础。虽然由于政府对高压气体的规定，最大压力被限制在220 Mpa，但开发了高温高压气体装置， ...更多信息在这项研究的三年时间里，成功地完成了这项工作。该装置不能产生与其他国家使用的气体装置一样高的围压（约500 Mpa），但它配备了比国外装置更好的轴向载荷和孔隙压力的伺服控制致动器。因此，本装置能够使用诸如孔隙压力振荡方法和脉冲衰减技术的各种方法来测量非常宽范围的渗透率。该装置将为研究超临界水等强腐蚀环境下的材料性质开辟道路，并具有许多工业应用。该装置已用于研究野岛断层、中央构造线、柳濑断层、中国地区的推覆边界断层和关轮断层等断层带在有效压力至180 Mpa和室温下的渗透率结构，孔隙流体为NH_2D_2D_2气。结果表明，有效压力循环效应明显，渗透率结构随构造背景和断层围岩类型变化较大。这项工作将扩展到断层本构特性和更多的渗透率测量温度和压力。少