随钻划眼采集模式的过套管声波测井数值模拟与实验研究
Progress in Geophysics（2021）
Abstract
随钻测井在高温高压井和大斜度/水平井应用广泛,在起钻或下钻的划眼过程中采集套管井段的声波数据,开展水泥胶结评价和地层评价的需求增加,因此套管井中开展随钻声场机理研究愈发重要.本文基于套管井随钻声波的柱状分层模型,利用实轴积分法对不同水泥胶结和地层软硬情况的随钻波形进行数值模拟,并进行传播速度特征研究.通过理论分析给出了套管井中随钻测井的模式波类型、传播速度与水泥胶结和地层速度的关系.现场套管实验井的随钻声波数据结果与数值模拟结果有一致性.本文的研究结果表明随钻声波测井有望能解决套管井固井评价的工程问题和过套管的地层声速提取的储层评价问题.
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