中文摘要：

采用自行开发的数值模型，模拟分析循环流体在双井增强型地热系统（EGS）地下热储中的渗流过程，系统分析不同水力渗透条件热储中流场形态的变化规律．结果表明，重力作用和流体动静压转换造成的“基础压差”与循环流体在地下裂隙岩体中的沿程阻力之间的相对大小是决定热储中流场分布形态的重要因素，而循环流量大小对热储内渗流场形态影响非常有限．基于此，我们提出水平井和多井环绕布局两种抑制流体短路的方案，为EGS的建设提供理论指导．

英文摘要：

With a self-developed numerical model, we simulate seepage flows in reservoir of an imaginary doublet EGS and perform a systemic investigation on flow pattern correlating with the reservoir hydraulic permeability. It reveals that the flow pattern in reservoir is mainly decided by relative magnitude of ＂ basic pressure difference＂ caused by gravity and hydrodynamic-hydrostatic pressure transformation to fluid flow resistance through fractured rock mass. Circulation flow rate exhibits a limited effect on the flow pattern. Based on this we bring forward two strategies, horizontal well and multiple well layouts, to restrain the down-hole flow circuit in EGS reservoir, which acts as theoretical guidelines for practical construction of EGSs.