地下热水回灌过程中渗透系数研究  

STUDY ON HYDRAULIC CONDUCTIVITY DURING GEOTHERMAL REINJECTION

作　　者：何满潮[1] 刘斌[1] 姚磊华[2] 徐能雄[1] 任红艳[1] 

机构地区：[1]中国矿业大学力学与建筑工程学院,北京100083 [2]中国地质大学工程技术学院,北京100083

出　　处：《吉林大学学报（地球科学版）》2002年第4期374-377,共4页Journal of Jilin University：Earth Science Edition

基　　金：国家杰出青年基金资助项目 (5 985 2 114 )

摘　　要：地下热水回灌是处理地热开发利用中所引发的热储层压力降低和弃水污染环境等问题的有效方法。第三系热储层的回灌过程中 ,由于物理阻塞和化学阻塞 ,导致热储层的渗透性下降。回扬可在短时间内消除或缓解堵塞问题 ,提高回灌效率。将利用回灌试验数据求得的渗透系数进行回归 ,得到渗透系数衰减方程。用数值方法模拟渗透系数对回灌的影响 ,对比渗透系数为常数与渗透系数变化两种情况 ,结果表明渗透系数衰减是第三系回灌能力下降的主要原因 。Geothermal water reinjection is an effective method to solve the problems caused by geothermal exploitation and utilization. In the process of geothermal reinjection, physical block and chemical block in the tertiary geothermal reservoirlead to decline of permeability. Exploitation from reinjection well within a short time can clear up or cut down block to enhance reinjection efficiency. Attenuation equation of hydraulic conductivity is attained by regressing hydraulic conductivity from calculation result of experimental data. The effect of hydraulic conductivity on geothermal reinjection is simulated with comparing the two conditions of constant hydraulic conductivity and variable hydraulic conductivity. The results show that attenuation of hydraulic conductivity is the main reason for decline of reinjection ability and hydraulic conductivity is an important factor to reinjection.

关 键 词：地下热水 回灌 渗透系数衰减方程 第三系 热储层 

分 类 号：P314.1[天文地球—固体地球物理学]