一种自动划分地层的计算方法

介绍一种自动划分地层的计算方法。该方法是运用地球物理测井信息,自动追索地震反射界面,定量地确定它在钻遇地层中的空间位置,建立地层层序,达到正确地划分地层的目的。在东海10多口钻井中,用该方法划分的地层界面与根据化石、岩相等所确定的地质时代分层界面基本一致,吻合率可达90％以上。

A Computative Method on Automatically Classif ied Strata

The paper introduces a computative method of automatically classifying the strata, which applies the information of geophysical well- logging for automatically following the trail of the reflecting boundary on a seismogram section, quantitatively acquiring its space location encountered in a forma-tion during drilling, setting up the sequence of strata and obtaining the goal of classifying the strata re-liably. Through the practice of this method with more than ten wells in the East China Sea, the relia-bility is conformable with the results from the methods of the microfossil and the lithofacies in dividing the strata from geological ages, and its conformability with these methods is over 90%.