冰岛Laugaland地热田示踪试验与回灌温度模拟

doi:10.7523/j.issn.2095-6134.2005.6.016

中国科学院大学学报 ›› 2005, Vol. 22 ›› Issue (6): 761-766.DOI: 10.7523/j.issn.2095-6134.2005.6.016

冰岛Laugaland地热田示踪试验与回灌温度模拟

张远东¹, 魏加华²

1. 中国科学院地质与地球物理研究所, 北京 100029;
2. 清华大学水利水电工程系, 北京 100084

收稿日期:2004-10-13 修回日期:2004-12-24 发布日期:2005-11-15
通讯作者: 张远东:E-mail:zhangyuandong@mail.tsinghua.edu.cn;电话:(010)62788787

Prediction of Injection Induced Cooling Based on Analysis of Tracer Test Data in the Laugaland Geothermal Field, S-Iceland

ZHANG Yuan-Dong¹, WEI Jia-Hua²

1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China

Received:2004-10-13 Revised:2004-12-24 Published:2005-11-15

摘要/Abstract

摘要：

开采井温度下降是热储回灌实施过程中的潜在问题之一。在冰岛Laugaland地热田研究过程中,为评价和预测回灌后热储温度的变化,采用示踪试验方法定量研究采、灌井之间的水力联系.示踪数据的解译分析表明,采、灌井之间的水力联系密切。基于示踪试验,对不同的采、灌量条件所引起的开采井温度变化进行了定量模拟。模拟结果与实测温度之间存在一定的偏差,主要原因可能是示踪试验阶段和实施回灌时热储中水动力条件存在差异所致。此外,该区的两次地震也可能在一定程度上改变了热储中水流运动模式。

关键词: 地热田, 回灌, 示踪试验, 温度, Laugaland, 冰岛

Abstract:

The temperature decline of production wells is a potential problem induced by reinjection.At Laugaland,in order to assess and predict the temperature changes result ing from reinjection,a tracer test was carried out as an effective tool for quantitat ively studying the hydraulic connection between production and injection wells.The analysis of the tracer test data indicates that the connection between the injection well GN-1 and production well LWN-4 is fairly direct.Based on the tracer test,the reinject ion-induced temperature decline of the production well LWN-4 was predicted under different hypotheses and production-reinjection scenarios.The calculated temperature decline is,however,a few degrees greater than the actual cooling observed.The discrepancy is mainly attributed to a drastic change in flow conditions because of reduced production since reinjection started.In addition,the major earthquakes in 2000 may also have influenced the flow-pattern in the reservoir at Laugaland.

Key words: geothermal field, reinjection, tracer test, temperature, Laugaland, Iceland

中图分类号:

P314

张远东, 魏加华. 冰岛Laugaland地热田示踪试验与回灌温度模拟[J]. 中国科学院大学学报, 2005, 22(6): 761-766.

ZHANG Yuan-Dong, WEI Jia-Hua. Prediction of Injection Induced Cooling Based on Analysis of Tracer Test Data in the Laugaland Geothermal Field, S-Iceland[J]. , 2005, 22(6): 761-766.

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冰岛Laugaland地热田示踪试验与回灌温度模拟

Prediction of Injection Induced Cooling Based on Analysis of Tracer Test Data in the Laugaland Geothermal Field, S-Iceland

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