液动潜孔锤技术应用于干热岩钻井的可行性探讨

Feasibility Study on Application of Hydraulic Hammer Technology in Hot Dry Rock Drilling

摘要:

分析了清洁、可再生能源干热岩的地质特征以及进行钻井施工可能会遇到的环境温度高、钻井深度大等技术难点，并依据此对液动潜孔锤钻进技术应用于该领域进行了分析。按照目前的技术水平和施工能力，提出干热岩钻井分两步走的思路，目前液动潜孔锤所能达到的指标应用于第一步（井深3000～6000 m，温度150～350 ℃）钻井实践已经基本具备，并对液动潜孔锤需要完善的关键技术提出解决的方案。

Abstract:

The analysis is made on the geological characteristics of hot dry rock which is a kind of clean and reusable energy and the technical difficulties that might be encountered in drilling construction, such as high temperature and large drilling depth. On this basis, the application of hydraulic hammer drilling technology in hot dry rock field is discussed. According to the present technical level and construction ability, hot dry rock drilling needs 2 steps; with the present technical performance index, hydraulic hammer has the basic conditions for the first step drilling of 3000-6000m in well depth at the temperature of 150-350 ℃. The solution to the key technology improvement is also put forward.