Drilling fluid and drilling fluid performance maintenance method based on wellbore temperature

The invention relates to the field of high-temperature geothermal drilling, in particular to a drilling fluid and a drilling fluid performance maintenance method based on wellbore temperature, which comprises the following steps: according to the change condition of the wellbore temperature in the drilling process, on the premise of ensuring the stable performance of the drilling fluid, taking the volume of the required drilling fluid as the standard; according to the performance requirements of a high-temperature geothermal drilling fluid system formed by research, the dosage of different treating agents is optimized, and the method is beneficial to optimizing the dosage of the drilling fluid treating agent and a treatment process, reducing the cost of the high-temperature geothermal well drilling fluid and effectively reducing the maintenance cost. 本发明涉及高温地热钻探领域，具体涉及一种钻井液及基于井筒温度的钻井液性能维护方法，包括根据钻井过程中井筒温度的变化情况，在保证钻井液性能稳定前提下，以所需钻井液的体积为准，根据研究形成的高温地热钻井液体系性能要求，优化不同处理剂的加量，该方法有利于优化钻井液处理剂加量及处理工艺，降低高温地热井钻井液成本，有效降低维护成本