天津地区雾迷山组水位降落漏斗演化特征及合理开发利用探讨

Evolution characteristics of the Wumishan Formation depression cones in Tianjin aera and discussion of rational development and utilization

雾迷山组是天津地区地热资源开发利用的主要热储层,连续32年的开采已形成较大规模的水位降落漏斗,热储压力下降形势严峻。本文通过对多年的雾迷山组热储水位监测数据进行系统整理、分析,对漏斗的形成和演化规律做了初步总结,提出雾迷山组水位降落漏斗在人为开采和地热地质条件共同影响下,目前仍以4～6 m/a的下降速率向深部扩展;同时从水均衡的角度提出资源合理开发利用的建议,认为降低地热流体的消耗量是缓解乃至解决雾迷山组热储压力下降、实现资源可持续开发利用的唯一途径。

Wumishan Formation is of Jixian Series the major geothermal reservoir stratum for the development and utilization of geothermal resources in Tianjin. Several large-scale groundwater depression cones have been formed during nearly 30 years exploitation,and the groundwater pressure is declining rapidly. This article summarizes the preliminary rules of the formation and evolution of the depression cones based on many years of monitoring data about the level in the Wumishan Formation. It is proposed that with the influence of artificial exploitation or geothermal and geological conditions,depression cones of the Wumishan Formation are still spreading to deep with a value of 4~6 m/a. Reasonable development and utilization suggestion with resources also be provided on the perspective of water balance. It is considered that reducing the consumption of geothermal resources is the only way to alleviate or even eliminate the thermal storage pressure declining and achieve the sustainable utilization of the resources.