运用统计分析法与Lumpfit模型计算烟台于家汤热泉可采资源量

Using statistical analysis and Lumpfit model to calculate the recoverable resources in Yujiatang geothermal field,Yantai City

于家汤地热田因地热流体的大量开采已出现水位、水温下降的现象,如何准确评价其可采资源量是地热田可持续开发的首要任务。本文基于于家汤地热田2006~2016年的水位、水温、水质、水量等长期动态观测资料,采用统计分析法计算得出该地热田在温度不低于38℃时的最大允许水位埋深为19m;利用Lumpfit集中参数模型模拟得出地热田在保持现有平均开采量不变的条件下,水位最大埋深可达14.5m;反演计算水位埋深降至19m时的可采资源量为1523m3/d,同时通过地热田多观测孔抽水试验解析法计算地热田可采资源量与之对比,充分证明本次研究采用方法的可靠性,从而为于家汤地热田的合理开发利用地热资源提供参考依据。

Due to the large amount of mining of the geothermal fluid,the water level and water temperature have decreased in Yujiatang geothermal field,how to accurately evaluate the recoverable resources is the primary task of sustainable development of geothermal fields.Based on the long-termdynamic data of water level,water temperature,water quality and water volume in the geothermal field from 2006 to 2016,using the statistical analysis method to calculate the maximum allowable water depth is 19 m when the geothermal field is not lower than 38℃.Using lumped parameter model to simulate that the geothermal field can maintain the current average production amount unchanged,the maximum depth of the water level can reach 14.5 m;through inversion calculation,the recoverable resource when the water depth is reduced to19 mis 1523 m3/d.At the same time,the amount of recoverable resources in the geothermal field is calculated by the analytical method of multi-observation hole pumping test in geothermal field,it fully proves the reliability of the method used in this study,and provides a reference for the rational development and utilization of geothermal resources in Yujiatang geothermal field.