一种基于虚拟井和多层对比的地层对比方法

利用分层后的测井曲线进行地层对比是地层对比的一个基本手段．文中提出了一种基于测井曲线分层结果的面向多井对比的地层对比算法．该算法采用原本用于空间插值的普通克里金方法创建虚拟井．借助虚拟井可以有效地将所有井的相同层段的地层相互关联起来，从而有助于地下三维地层图的绘制．此外，在每两口井的地层对比算法中提出了多层对比的概念，并采用动态规划法进行两井对比，使两井对比结果更加贴近实际利用VC＋＋开发了一套基于该算法的地层对比系统软件实验结果表明，利用该算法的对比结果拟合出的三维地层图十分贴近真实情况

A Method of Stratigraphic Correlation Based on Virtual Wells and Multi-Layer Correlation

The stratigraphic correlation using the stratified well logs is a basic way of stratigraphic correlation. A multi-well correlation oriented stratigraphic correlation algorithm was proposed based on the stratifying results of well logs. The algorithm applied the ordinary Kriging method that was originally used in spatial interpolation to construct virtual wells. The strata from different wells could be correlated simply and effectively by virtue of the virtual wells so as to map the underground 3D strata graph. The concept of multi-layer correlation was given in the stratigraphic correlation algorithm handling every two wells. The method of dynamic programming was used to correlate two wells,so the correlation results are closer to the actuality. A set of software of stratigraphic correlation system was developed using microsoft Visual C＋＋ based on the above algorithm. Experimental results show that the 3D strata graph fitted by using the correlation results of the algorithm is very close to the actuality.