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因为钻井过程中,井眼跨塌和井壁的凹凸不平使声波在井内传播的实际路径发生了改变,使声波时差测井曲线受到影响从而降低解释资料的精度,所以对声波时差进行校正是数据处理的一个重要环节。本文介绍了一种声波时差校正的方法:首先做井径与声波时差的散点图利用统计建模的方法回归出井径与声波时差的关系式,然后找出一种能有效地对声波测井资料进行校正的方法,最后声波时差求地层孔隙度,并对校正前后计算的孔隙度进行了对比和分析。
Because the wellbore collapse and uneven borehole wall make the actual path of sound wave propagating in the well changed during the drilling process, the acoustic logging will be affected and the accuracy of interpretation data will be reduced. Therefore, the correction of the acoustic time difference is the data An important part of the process. In this paper, a method of acoustic time-difference correction is introduced. Firstly, a scatter plot of the diameter of the well and the time difference of the acoustic wave is used to calculate the relationship between the diameter of the well and the acoustic time difference. Then, Data correction methods, the final acoustic wave difference seeking formation porosity, porosity and calculated before and after correction were compared and analyzed.