摘要
回灌试验表明随回灌时间的推移,回灌能力逐渐下降.在对第三系热储进行回灌过程中,热储的物理、化学阻塞使得渗透性下降.定量分析对井回灌过程中回灌井周围渗流场变化,渗透系数呈指数衰减.建立对井回灌渗流场数学模型,描述回灌压力、回灌流量随回灌时间的变化,以及回灌井周围热储中水头随回灌时间和距回灌井距离的变化,并采用离散化方法进行求解.分别模拟渗透系数变化与不变时渗流场的情况,计算结果表明渗透系数衰减不利于回灌,是影响回灌能力的重要因素.
Geothermal reinjection experiments show that reinjection ability declines with time. In the process of water reinjection, physical and chemical blocking in the Tertiary geothermal reservoir lead to a decline of permeability. The permeability coefficient of the seepage field changes in the exponent attenuation. A mathematics model of the seepage field was established to describe the geothermal reinjection process and a discrete method was adopted to solve the model. The seepage fields of K being variable and constant were simulated. The results show that the attenuation of permeability coefficient is unfavorable to water reinjection. Permeability coefficient is the important factor to water reinjection ability.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2004年第3期245-248,共4页
Journal of China University of Mining & Technology
基金
国家自然科学创新集体基金项目(50221402)
关键词
地热
对井回灌
渗流场
模型
geothermal
geothermal doublets
model of seepage field
