钻探工程2025，Vol.52Issue(5)：61-66,6.DOI:10.12143/j.ztgc.2025.05.008
中深地热井复杂地层钻进高温钻井液研制
Research and development of high-temperature drilling fluid for complex strata in deep geothermal wells
摘要
Abstract
In recent years,the geothermal sector in China has witnessed rapid growth,and the significance of the development and utilization of geothermal resources has significantly escalated.To effectively drill medium-deep geothermal wells in complex strata,this paper focuses on the technical drilling issues that arise in medium-deep geothermal wells when penetrating water-sensitive strata,water-gushing strata,fractured and loose complex strata,as well as high temperatures within the boreholes.Based on a large number of experiments,an initial selection of high-temperature-resistant drilling fluid formulations was made.The optimal formulation was determined through orthogonal experiments.Through effective tests,the water loss of the drilling fluid at a high temperature of 120℃in the well was 8.4mL,the funnel viscosity was 24s,the yield point was 1.43Pa,the apparent viscosity was 14.5mPa·s,the plastic viscosity was 13.1mPa·s,the pH value was 8,the density was 1.04g/cm3,and the anti-aging performance of the drilling fluid flowing for 48 hours at 120℃was excellent.It indicates that the high-temperature-resistant drilling fluid developed for medium-deep geothermal well drilling(around 3000m)can meet the requirements of medium-deep geothermal well drilling,featuring good rheological properties,high-temperature resistance,anti-aging properties,and water loss and wall-building properties,and can effectively address the problems encountered during the drilling of medium-deep geothermal wells in complex strata.关键词
中深地热井/复杂地层/抗高温/钻井液/性能测试Key words
medium-deep geothermal well/complex formation/high-temperature resistance/drilling fluid/performance test分类
天文与地球科学引用本文复制引用
吴景华,冯海涛,谢俊革,吕涛,魏四平,戚波..中深地热井复杂地层钻进高温钻井液研制[J].钻探工程,2025,52(5):61-66,6.基金项目
吉林省发展和改革委员会项目"吉林省地热能开发利用产业化关键技术研究"(编号:2023C033-3) （编号:2023C033-3）
