Underground real-time monitoring method and device of formation water contamination rate

The invention relates to an underground real-time monitoring method and device of the formation water contamination rate. A detection method for calculating the water-based mud contamination rate is constructed on the basis of formation fluid characteristics. By adopting the method, the contamination condition (the formation water contamination rate, i.e. the proportion of pure formation water towater-based mud intrusion fluid) of formation extracted fluid samples can be calculated in real time, and explorers and interpreters are guided to distinguish the formation water and the water-based mud intrusion fluid. 地层水污染率井下实时监测方法与装置，基于地层流体特性，构建一种计算水基泥浆污染率的检测方法，借助该方法，可以实时计算地层抽取流体样品的污染情况(地层水污染率，即纯净地层水和水基泥浆侵入液的比例)，指导勘探人员、解释人员区分地层水和水基泥浆侵入液。