地震资料解释中应用测井数据需注意的几个问题

Several problems need to be noticed in the application of logging data to seismic data interpretation

测井资料作为连接地震与地质的桥梁和纽带,在地震资料构造解释、反演以及储层预测中得到了广泛应用。通过理论及实际测井数据分析,探讨了测井数据的频散特性、不同仪器测量结果的差异性等,指出了地震资料解释中应用测井数据应该注意的几个问题:①地震数据与声波测井数据之间存在由速度频散引起的差异,层位标定中应进行必要的匹配校正,地震反演中不能过分追求反演结果与测井数据的一致性;②测井数据并非真值,同样存在一定的误差,应用中不可将测井数据绝对化;③基于测井数据的统计回归分析应注意数据选取的系统性、数据分布的均匀性以及数据量的充分性。

As the bridge and link of exploration seismology and geology,well logging data is widely used together with seismic data for structure interpretation,inversion and reservoir prediction.By analyzing the theoretical and actual well logging data,we discussed the dispersion of well logging data and compared the measurement results from different well logging instruments.As a result,we pointed out that several points should be considered in the application of logging data to seismic data interpretation.Firstly,the difference caused by velocity frequency dispersion exists between seismic data and acoustic logging data;therefore,matching correction is necessary in seismic reflection horizon calibration,and it is not advisable to emphasize the consistency of seismic inversion results with well logging data excessively.Secondly,the well logging data is not true value,which also exits error,therefore,well logging data should not be regarded as true value in application.Thirdly,the statistics regression analysis based on well logging data requires systematic selection,even distribution and abundant data.