废弃油井直接换热技术及应用效果评价

基于呼伦贝尔地区的地下地质特征，在工作区内选取深度、井身结构和套管程序都适宜的废弃油井，依据《浅层地热能勘查评价规范》将底部射孔层位进行封堵改造，实现了超导液闭式循环，达到了深井直接换热的目的.通过对区内ZK1油井的直接换热试验，经稳定测试取得了单井换热功率约162 kWh，每延米换热量为90 W的良好应用效果.ZK1油井直接换热改造的成功，标志着废弃油井直接换热改造是可行的，并总结了一套改造技术流程及取热利用方案，同时为类似改造工程积累了值得进一步推广的经验，为清洁能源地热的利用开辟了一条新的途径.

EVALUATION ON APPLICATION EFFECT OF DIRECT HEAT EXCHANGE TECHNOLOGY IN ABANDONED OIL WELLS

Based on the subsurface geological characteristics of Hulun Buir area, the abandoned oil wells with suitable depth, well structure and casing program are selected in the work area. According to the "Criteria for Exploration and Evaluation of Shallow Geothermal Energy", the bottom perforation layers are sealed and transformed to achieve the superconductive liquid closed circulation and direct heat exchange in deep wells. Through the direct heat exchange test of ZK1 oil well, a good application effect of single well heat transfer power about 162 kWh and heat transfer energy of 90 W/m are obtained by stability test. The successful result of ZK1 oil well indicates that the direct heat exchange transformation of abandoned oil wells is feasible. Moreover, it summarizes a set of transformation process and heat utilization scheme, which provides experience for similar projects and opens up a new way for utilization of clean geothermal energy.