基于DTW算法的井间动态连通性评价

Inter-well dynamic connectivity evaluation based on DTW algorithm

针对注采井间动态连通性反演中影响因素多、滞后性和衰减性影响考虑不足的问题,以注采井井底流压动态变化数据为基础,应用数据标准化方法与动态时间规整(dynamic time warping,DTW)算法进行数据处理和计算,得到注水井流压与油井井底流压时间序列曲线的DTW距离,并以此量化判别注水井流压与油井井底流压曲线的相似度,进而评价出注采井间动态连通性的强弱,这在一定程度上克服了注采井间压力传播衰减性和滞后性的影响。将研究成果应用于矿场实际井组连通性评价,结果表明,DTW算法计算连通性评价结果与矿场特征相吻合,该方法对于矿场快速评价井间连通性具有重要意义。

Aiming at the problem of multiple influence factors and hysteresis and attenuation lack of consideration in dynamic connectivity between injector-producer inversion,based on injector-producer dynamic change data of bottom hole flowing pressure,using the data standardization method and the dynamic time warping(DTW)algorithm to carry out data processing and calculating,the DTW distance between the injection well flow pressure and the bottom hole flow pressure curve was obtained and the similarity between the injection well flow pressure and the bottom well flow pressure curve was quantified based on this to evaluate the strength of dynamic connectivity between injection and production wells,to a certain extent,overcoming the influence of pressure transmission attenuation and delay between the injection-production well The research results were applied to the evaluation of the actual well group connectivity in the mine,and the results show that the calculated connectivity evaluation results of the DTW algorithm are consistent with the characteristics of the mine.This method is of great significance for the rapid evaluation of inter-well connectivity in the mine.