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时深关系的精确与否直接关系地震资料解释的准确度,在地震资料解释过程中处于上游阶段.在各种时深关系获取中以VSP资料最为准确,但是传统的VSP时深标定都是基于地层倾角为零的基本假设,在地层为平层或地层倾角很小的情况下对于地震资料的解释而言是准确的,但是当地层倾角较大时,与平层相比VSP走时存在很大的误差.若依然按照平层模型进行时深标定则会发生层位串层现象,导致地震资料解释不准确.为此本文围绕时深标定开展了倾斜地层VSP走时分析以及VSP精细时深标定软件系统的研究工作.最后,利用该软件系统对实际资料多种曲线进行时频分析及时深关系校正,取得了良好的效果.
The accuracy of the time-depth relationship is directly related to the accuracy of seismic data interpretation, which is in the upstream stage in the process of seismic data interpretation. The VSP data are the most accurate among all time-depth relationships, but the traditional VSP time- The basic assumption that the dip of a dip is zero is accurate for the interpretation of seismic data when the stratum is flat or the dip of the stratum is small. However, when the dip of the stratum is large, there is a large VSP travel time compared with the stratum Of the error.If still in accordance with the flat-layer model for the time-depth calibration layer stratigraphy will occur, resulting in seismic data interpretation is not accurate.To this end, the time-lapse calibration carried out inclined VSP walking time analysis and VSP fine time-depth calibration software System.Finally, the software system is used to time-frequency analysis and time-frequency correction of a variety of actual data curves, and achieved good results.