摘要
测井曲线标准化用来消除数据采集时不可避免的系统误差,是多井油藏评价和井震结合储层预测中必不可少的基础性工作.本文对测井曲线标准化研究现状进行了分析,阐述了测井曲线标准化的基本思想和标准化方程;提出了常规方法选取理想标准层困难的情况下的几种解决办法:"相控标准层"、"视标准层"、"虚拟标准层"以及"宏观标准层"等,并对这些方法的优缺点及各自的适用范围做出了客观评价;对标准化过程中特征值和标准值的确定问题进行了讨论:除了常规的直方图法、趋势面法等,还对包络函数法、具有趋势的克里格法以及BP神经网络法等较为新颖的方法做了介绍,并给出了每种方法的适用条件;对测井曲线标准化效果的评价方法进行了总结,提出利用取心井资料检验的方法和对标准化后的数据和偏差分析的检验方法.最后指出了标准化工作中应该注意的一些问题.
Well log normalization is used to reduce systematic errors which is inevitable in data acquisition so that reliable results may be obtained for following processing.It is an essential work in multi-well reservoir evaluation and well-seismic reservoir prediction.In this paper,the research status of well log normalization is analyzed,and the basic idea and normalization equation are expounded.The normalization equation adjusts log data based on the basic idea.It is a function of four variables,two of which are defined for each well called characteristic value(Wmax and Wmin)and two of which are related to regional lithologic patterns called standard value(Rmax and Rmin).Also,several solutions to the situation for lack of stable marker bed by conventional methods are proposed:"facies-control marker beds","apparent marker beds","virtual marker beds"and"macro marker beds",and the advantages and disadvantages of these methods are evaluated objectively.The determination of characteristic value(Wmax and Wmin)and standard value(Rmax and Rmin)in the normalization process is discussed:in addition to the conventional histogram method and trend surface method,some other methods such as envelope function method,trend kriging method and BP neural network method are also introduced.The applicable conditions of each method are given.Two evaluation methods of normalization result are summarized:Comparison of core test data method and normalization data and deviation data analysis method.Finally,some matters that should be paid attention to in normalization work are pointed out.
作者
高春云
周立发
路萍
GAO Chun-yun;ZHOU Li-fa;LU Ping(Department of Geology,Northwest University,Xi'an 710069,China;State Key Laboratory for Continental Dynamics,Northwest University,Xi'an 710069,China)
出处
《地球物理学进展》
CSCD
北大核心
2020年第5期1777-1783,共7页
Progress in Geophysics
关键词
标准化方程
标准层
特征值
标准值
Normalization equation
Marker bed
Characteristic value
Standard value
