Extrapolate well logs based on the constrained interpolation algorithm

基于约束插值算法的井资料外推(英文)

Based on a detailed analysis of differences between seismic data and well logs, we discuss the problem of matching seismic traces and well logs and present a new matching method based on event search in instantaneous phase which greatly improves seismic resolution. The method is based on flattening events in instantaneous phase to compare the seismic traces to the well log traces with the same phase. We calculate the coefficients using the singular value decomposition method to extrapolate the well logs. As a result, the events in the seismic profile are continuous and match well with well logs. We apply this method to the Mao-2 well in Daqing Oilfield with good results.

本文在详细分析地震和测井方法属性差异的础上,系统讨论了声测井和地震资料的匹配问题,提出了一种基于瞬时相位地层追踪的井震匹配方法。通过同相轴拉平技术使地震资料和井旁道资料同相位对比,运用SVD方法求解方程得到插值系数,并利用插值系数把测井资料外推,从而得到同相轴连续,分辨率高,同时在井孔与测井资料能够匹配的地震资料。本方法应用于大庆mao2井区数据,得到了很好的效果。