在蓬勃发展的地热领域，为了钻探更深、获取更高温地层，基底钻探的需求日益增长，这带来了与沉积盆地钻探不同的挑战。本研究评估了在罗马尼亚潘诺尼亚盆地基底钻探先进地热系统（AGS，一种闭环式非常规地热系统）的可行性。主要钻探目标包括在预期的硬岩层中实现高瞬时钻速（ROP）和延长钻头寿命，同时通过优化井底钻具组合（BHA）和钻柱设计来识别和解决作业限制。
潘诺尼亚盆地沿匈牙利边境向罗马尼亚境内延伸 50-100 公里，是一个有据可查的地热异常区，其热流密度范围为 50 至 130 毫瓦/平方米。历史上，其丰富的地热资源一直被用于供暖，主要是在温室中使用传统的热水生产方式。
为了减少对天然储层的依赖，两种创新的独立储层地热方法应运而生：利用水力压裂技术的增强型地热系统（EGS）和闭环系统（也称为AGS）。EGS借鉴了油气压裂技术，在不透水岩层中开凿通道，循环水流提取地热能。尽管EGS在缺乏含水层的地区效果显著，但它也面临着诱发地震和成本高昂等挑战。
In the expanding geothermal sector, the push to drill deeper and reach hotter formations is leading to increased basement drilling, which presents different challenges than those posed by sedimentary basins. This study evaluates the feasibility of drilling an advanced geothermal system (AGS), a closed-loop, unconventional geothermal system, in the Pannonian Basin basement of Romania. Key drilling objectives included achieving high instantaneous rate of penetration (ROP) and extended bit life in anticipated hard rock while also identifying and addressing operational limitations through optimized bottomhole assembly (BHA) and drillstring design.
The Pannonian Basin, extending 50–100 km into Romania along the Hungarian border, is a well-documented geothermal anomaly with heat-flow densities ranging from 50 to 130 mW/m². Its abundant geothermal resources have historically been tapped for heating, primarily in greenhouses using classical thermal water production.
To reduce reliance on natural reservoirs, two innovative reservoir-independent approaches have emerged: enhanced geothermal systems (EGS) using hydraulic fracturing and closed-loop systems [also referred to AGS]. EGS adapts oil and gas fracturing techniques to create pathways in impermeable rock, circulating water to extract heat. Though effective in areas lacking aquifers, EGS faces challenges from induced seismicity and high costs.
