地热井套管外水位测管系统的设计与试验应用

Design and Application of Water Level Monitoring Tube System Outside Geothermal Well Casing

摘要:

地热井水位的监测是地热开发与利用过程中的一项重要工作，尤其是为了加强资源管理，合理平衡利用地热资源，使得监测工作日趋常态化。目前水位测量的工作主要在地热井的套管内来实现，或直接下入测线、或以并列安装在泵管上的测管作为通道来完成测量工作，其中前者由于潜水泵的泵管和电缆易与测线发生缠绕，影响测量精度，后者由于系统不完善经常无法测量，无法达到监测测量工作的要求。针对这些问题研制了一套基于连通器原理的套管外水位测管系统，并通过在试验井的安装测试证明其可行性及实用性。介绍了该系统的工作原理、结构设计、安装测试过程，并对测试结果进行了分析和评价。

Abstract:

Because of the importance in the process of geothermal energy development and utilization, water level monitoring of geothermal wells is generally normalized, especially for enhancing resource management and reasonable use of geothermal resources. Currently, the water level measurement is mainly carried out inside the geothermal well casing by directly putting down the measuring line or making use of measuring tubes installed side by side on the pump pipe as channels for measurement. The measuring accuracy would be affected by the tangling of submersible pump pipe & cable and measuring line with the former; and the measuring requirements could not be met because of the imperfect system with the latter. To solve these difficulties, a set of water level monitoring tube system outside casing was developed based on the communicating principle and the feasibility and practicability were proved by the installation test in test well. The paper introduces this system about its working principle, structure design and installation test process, the test results are analyzed and evaluated.