Groß-Triaxialpresse

本提案的总体目标是建立一种新型的多物理场大型实验室设备，用于深部储层岩石测试，称为地质-储层实验模拟技术（GREAT）三轴单元。GREAT单元将使研究人员能够更好地理解、评估和测试地质储层（经典和强化地热、二氧化碳储存、碳氢化合物、核废料处理和油气地质储层）中多物理流体-岩石耦合过程的性质和行为，解决与地质储层相关的环境问题，并为地质学和岩石力学专业的学生提供教育。科学的基本焦点是流体在高应力热岩中的裂缝流动，岩石-流体力学，热，生物和化学相互作用，以及在复杂和变化的模拟地应力条件下具有裂缝和裂缝的准脆性岩石的破裂力学和诱发地震活动性的现实见解。为了回答尚未解决的多物理场问题，新型大型GREAT电池将具有先进的功能：(1)随时间（例如在实验期间）改变所有三个主应力的大小；(2)提供非均匀主应力场；(3)独立旋转三个主应力中的两个，即使在实验过程中也是如此；(4)以高时空分辨率研究孔隙流体压力和岩石裂隙流体流动；(5)先进的监测系统将内置在细胞，以跟踪应力，应变，孔隙和流体压力，温度和波在样品中的传播。

The overall goal of this proposal is to build a novel multi-physics large-scale laboratory equipment for deep reservoir rock testing termed the Geo-Reservoir Experimental Analogue Technology (GREAT) Triaxial cell. The GREAT cell will enable researchers to better understand, evaluate and test properties and behavior of multiphysical fluid-rock coupled processes in georeservoirs (classical and enhanced geothermal, CO2 storage, hydrocarbons, nuclear waste disposals and oil and gas geo-reservoirs), address environmental questions related to geo-reservoirs and educate geology and rock mechanics students. The scientific fundamental focus of interest is fluid flow through fractures in highly stressed hot rock, rock-fluid mechanical, thermal, biological and chemical interactions and realistic insight in fracture mechanics and induced seismicity for quasi-brittle rocks with cracks and fractures under complex and changing simulated in situ stress conditions. In order to answer the multi-physics questions not yet resolved, the novel large GREAT cell will have advanced capabilities: (1) varying the magnitude for all three principal stresses with time (e.g. during an experiment); (2) providing a nonuniform principal stress field; (3) rotating two of three principal stresses independently, even during the experiment it-self; (4) studying the pore fluid pressure and flow of fluid through rock fractures at high spatial and temporal resolution; (5) advanced monitoring system will be built into the cell in order to track stress, strain, pore and fluid pressure, temperature and wave propagation through the specimen.