测井资料预处理-交会图技术(各种测井交会图).ppt

一、交会图的概念、类型、用途一、交会图的概念、类型、用途 1、交会图表示地层的测井参数或其它参数间关系的图形 2、交会图的类型交会图频率交会图 Z值图直方图 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 3、用途检查曲线质量对曲线进行校正鉴别岩石的矿物成分确定地层的岩性组合分析流体性质选择解释模型和解释参数计算地层的地质参数检验解释模型及评价地层 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 主要的交会图岩性--孔隙度 M----N 交会图 MID 交会图二、交会图版交会图版是用来表示给定岩性的两种测井参数关系的解释图版。交会图是根据纯岩石的测井响应建立的理论图版,是测井解释与数据处理的依据。 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 1、岩性孔隙度交会图的类型是当前广泛、用来研究解释井段的岩性的交会图图版。 L--- ? bCNL---AC AC--- ? b? b----Pe 2、使用条件纯岩石、原始测井值必须进行井眼、泥质和油气校正。 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 3、交会图的制作原理? b=(1-?)? ma + ?? f? N =(1-?)? Nma + ??? Nf 在岩性、?一定的情况下可以算出相应的? b、??岩性线:在交会图上标有岩性的线岩性点:标有岩性的点 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. P81 图 2-53 中子密度交会图中子密度交会图 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 4、交会图的应用(1)、确定岩性根据资料点所在的位置确定是岩石由单矿物、双矿物构成中子孔隙度密度岩性线砂岩灰岩白云岩等孔隙度线 AB 每种矿物的百分含量砂岩=PB\AB 灰岩=1-(PB\AB ) 资料点