Numerical Simulation for Hot Dry Rock Geothermal Well Temperature Field

• 作者: Hao Yang Yuan Shao
• 来源期刊: 化学工程与科学期刊(英文)
• 学科: 医学
• 关键词: HOT DRY ROCK GEOTHERMAL WELL Temperature Field NUMERICAL Simulation
• 年，卷（期）: 2017,（1）
• 页码范围: 34-44
• 页数: 11页
• 分类号: R73

摘要

Study on temperature distribution simulation during cementing of hot dry rock (HDR) geothermal well is rare. It has important guiding significance to simulate the construction process of temperature distribution of hot dry rock on site construction. Based on numerical simulation of HDR considering heat-fluid-solid coupling, the influence of temperature distribution on well cementing is analyzed when the drilling fluid cycles and reaches stable state, respectively, and when the cement slurry is injected during the cementing process. It is found that the seepage at the well bottom accelerates the flow velocity of wellbore;the stable temperature change is less than the cyclic temperature change;and the upper and lower temperature variation of the stratum is greater when the cement slurry is injected. Therefore, as to cement retarder involved, the influence of temperature variation on concretion should be considered during cementing of the hot dry rock geothermal well.