基于开挖的增强型地热系统概述

地热能赋存于地球内部岩土体、流体和岩浆体中,是一种永久的、可再生的、储量丰富的清洁能源。地热能的开发,尤其是干热岩的开发利用,有可能成为解决人类未来能源危机的重要途径。目前采用的干热岩开采方法被称为增强型地热系统(EGS)。热储地质环境的复杂性和水力化措施对天然裂隙的依赖性,造成多数的EGS项目存在热储体积和换热面积不足、工质流量小、终端温度低,以及诱发地震风险等局限性,致使干热岩开发始终未能大规模商业化。基于开挖的增强型地热系统(EGS-E)的提出为突破传统EGS的技术弊端和规模局限提供了新思路。文章在其概念模型的基础上,从系统原理、工程构想、技术优势等方面对EGS-E进行了更详尽的阐述。EGS-E采用开挖、爆破、崩落等采矿技术,形成了独特的热储致裂系统和热能交换系统,能够大幅度降低地质环境对热储质量的限制,具备构建定制的热储空间、形成充足的换热面积,维持稳定的工质流量与温度及减少诱发地震风险等优势,为干热岩开发的商业化提供了新的解决方案。     

北祁连山中西段塞浦路斯型铜矿特征、成矿作用及找矿标志

本文总结北祁连山中西段塞浦路斯型铜矿特征及找矿标志 ,获得如下认识 :1成矿环境为奥陶纪亲弧扩张脊 (岛弧扩张脊和弧后扩张脊 ) ,容矿岩石为蛇绿岩套上部火山 -沉积岩系 ;矿床成矿金属组合为铜锌 ,贫铅 ;2矿床地质模型为蘑菇状 ,蘑菇茎代表沿热液通道的柱状矿体 ,蘑菇伞代表在热液喷流口周围海底展开的透镜状、似层状矿体 ,伞翼之下为基性火山岩 ,伞上常覆盖碧玉岩 ,成矿环境不稳定时 ,缺失碧玉岩。近喷流口位置矿体 Cu>Zn,远喷流口位置矿体 Cu相似文献   

Laboratory Simulation of Vertical Hydrocarbon Microseepage

Based on a conceptual model of hydrocarbon microseepage, a macro-sized experimental equipment used the matched mixtures of cement and quartz sand as simulated caprock and its overlying strata is first set up to simulate the processes of hydrocarbon microseepage and its near-surface expressions. The results of the simulation experiments suggest that simulated caprock and its overlying strata have a certain sealed capability; hydrocarbon microseepage is dominated by the pressure of point gas source, and temperature plays only a subordinate role; on the path of hydrocarbon microseepage, the distribution of hydrocarbon concentration is fan-shaped; differential adsorption of alkanes by the simulated caprock and its overlying strata results in the occurrence of a chromatographic effect. Different migrating patterns within simulated caprock are shown by the ratio of i-butane to n-butane. The concentration of hydrocarbon in the surface soil has good correspondence with the pressure of point gas source. These simulation results are significant to further study of the mechanism of anomalies recovered in surface geochemistry exploration.     

Seismological investigations of fireworks factory explosions in Hendek-Sakarya (Turkey)

Journal of Seismology - On July 3, 2020, a sequence of explosions occurred in the Hendek fireworks factory in Sakarya, Turkey. The explosion caused great material damage and loss of life. In this...